...Highlights of 2023...

• Annual: Period of Record is 105 years
  • 12th coldest year on record at 41.2F degrees. This was 2.7degrees below normal.
  • 3rd Wettest year on record with 15.51 inches. This is 163% of Normal
  • 1st Snowiest year on record with 92 inches. This is 208% of normal.
  • 1st Snowiest Snowfall Season (July 2022-June 2023) with 94.7 inches of snow.
• Monthly Temperatures: 3rd coldest February, 2nd coldest March, 9th coldest April and 9th warmest May on record.

• Monthly Precipitation:  1st wettest January, 3rd wettest June, 7th wettest August, 10th wettest October and 3rd wettest November on record.

• Monthly Snowfall: 1st snowiest January, 9th snowiest April, and 1st snowiest November on record.

Temperatures

Precipitation

Snow

  

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Average High	22.9	38.2	49.8	59.8	65.7	84.8	88.7	86.2	81.0	66.2	44.8	41.8	60.8
Mean High (1991-2020 Normals)	28.7	35.5	49.2	58	67.4	78.9	87.9	85.7	74.4	59.2	42.7	29.6	58.1
Average Low	0.7	15.6	24.8	32.8	38.0	51.4	53.7	53.0	44.9	35.1	19.3	5.7	31.3
Mean Low (1991-2020 Normals)	4.2	9.6	22.2	30.5	40.3	48.5	54.8	52.2	42.5	30.4	17.1	5.7	29.8
Average Temperature	11.8	26.9	37.3	46.3	51.9	68.1	71.2	69.6	63.0	50.6	32.0	28.4	46.4
Mean Average Temperature (1991-2020 Normals)	16.4	22.5	35.7	44.2	53.8	63.7	71.3	69	58.4	44.8	29.9	17.6	43.9
Departure from Normal	-4.6	4.4	1.6	2.1	-1.9	4.4	-0.1	0.6	4.6	5.8	2.1	10.8	2.5
Rank: Coldest         to          Warmest  106 years of record (P.O.R 12/1918-2024)	30	78	85	77	28	95	62	75	102	102	76	100	96
Highest Daily Maximum	40	55	64	77	83	96	100	98	92	94	62	53	100
Date of Occurrence	30	26	19	15	29	24	12	4	3	5	12	23	7/12
Lowest Daily Minimum	-30	-12	13	22	25	38	44	41	35	18	7	7	-30
Date of Occurrence	16	17	5	21	2	19	4	30	22	31	29	10,16	1/16
Number of Days with:
Maximum >= 90°	0	0	0	0	0	9	15	11	4	0	0	0	39
Maximum <= 32°	23	7	0	0	0	0	0	0	0	0	1	1	32
Minimum <= 32°	31	29	31	15	7	0	0	0	0	13	30	31	187
Minimum <= 0°	8	2	0	0	0	0	0	0	0	0	0	0	10
Record Highs Set or Tied	0	0	0	0	0	0	0	0	2	0	0	0	2
Record Lows Set or Tied	1	0	0	0	1	0	0	0	0	0	0	0	2
* Multiple day occurrence

Temperature Ranks and Records:

 Daily Records:

 
Max:

 

   September: 91 on the 29th and 91 on the 30th.

 

Min:  

    January: -35 on the 30th

   May: 29 on the 24th (tie)

 

Top Ten Warmest June's on Record
Rank		Year		Average Temperature °F
1		1988		72.2
2		2021		70.2
3		1977		69.3
4		2016		68.9
5		2006		68.8
6		2012		68.5
7		2015		68.4
8		1933		68.2
9		2024		68.1
10		2013		67.6

 

Top Ten Warmest September's on Record
Rank		Year		Average Temperature °F
1		2015		63.6
2		1998		63.5
3		1990		63.4
4		2024		63.0
5		2022		62.9
6		2009/2001		62.3
8		1938		62.2
9		1948		62.1
10		1940		62.0

 

Top Ten Warmest October's on Record
Rank		Year		Average Temperature °F
1		1963		52.0
2		2015		51.7
3		2010		50.9
4		2003		50.7
5		2024		50.6
6		2014		50.4
7		1988		50.0
8		1934		49.6
9		1933		49.4
10		2011		49.2

 

Top Ten Warmest December's on Record
Rank		Year		Average Temperature °F
1		1933		31.8
2		2021		30.4
3		1950		29.2
4		1980		29.0
5		2024		28.4
6		1957/1946		27.7
8		1999		27.3
9		1939		27.2
10		1929		26.5

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Warmest Years on Record (100 Years)
Rank		Year		Average Temperature °F
1		2012		48.5
2		2021		47.1
3		2006, 1999		47.0
5		1934		46.9
6		2007		46.5
7		2024		46.4
7		2005, 1981		46.3
9		1954		46.2
10		2015		45.9

 

Top Ten Coldest Years on Record
Rank		Year		Average Temperature °F
1		1993		38.8
2		1924		39.5
3		1984, 1944		39.7
5		1978		40.1
6		1985		40.3
7		1968, 1929		40.5
9		1975		40.8
10		1986, 1932		41.0
96		2024		46.4

 

Average Annual Temperature for Period of Record - Click on Graph to Enlarge

  

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Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	0.35	1.07	0.36	0.73	1.68	0.96	0.14	0.40	0.08	0.60	0.24	0.05	6.66
Mean Precipitation (1991-2020 Normals)	0.35	0.43	0.71	1.31	1.98	1.09	0.70	0.45	0.80	0.93	0.44	0.31	9.5
Departure from Normal	0	0.64	-0.35	-0.58	-0.30	-0.13	-0.56	-0.05	-0.72	-0.33	-0.20	-0.26	-2.84
Percent of Normal	100	249	51	56	85	88	20	89	10	65	55	16	70
Rank - Driest            to           Wettest  106 years (P.O.R. 1918-2024)	81	102	52	37	56	54	21	58	14	52	41	23	19
Greatest 24-HR Total	0.19	0.56	0.16	0.27	0.44	0.91	0.06	0.26	0.03	0.31	0.23	0.05	0.91
Dates of Occurrence	11	4	14	1	6	21	21	27	4	30	13	31	6/21
Number of Days with:
Precipitation >= 0.01	5	8	6	7	10	3	5	5	3	6	2	1	61
Precipitation >= 0.10	2	3	2	2	5	1	0	1	0	2	1	0	19
Precipitation >= 1.00	0	0	0	0	0	0	0	0	0	0	0	0	0
Daily Precipitation Records Set or Tied	1	0	0	0	0	0	0	0	0	0	0	0	1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Precipitation Ranks and Records:
 

One Day Precipitation Records:

   January: 0.10." on the 13th.

     

Top Ten Wettest Months of February on Record
Rank		Year		Precipitation (inches)
1		2004		1.33
2		2015		1.28
3		2003		1.15
4		2024		1.07
5		2020		0.98
6		1986		0.97
7		2017		0.96
8		1955		0.90
9		1935		0.86
10		1920		0.80

 

Top Ten Driest Years on Record
Rank		Year		Precipitation (inches)
1		1988		3.75
2		2012		3.98
3		1974		4.12
4		1954		4.85
5		2001, 2006		5.07
7		2020		5.62
8		1966		5.66
9		1990		5.71
10		1922		5.91
19		2		15.51

 

Top Ten Wettest Years on Record
Rank		Year		Precipitation (inches)
1		1923		18.43
2		2017		15.86
3		2023		15.51
4		2016		15.24
5		1941		14.74
6		1912		14.73
7		1993		13.49
8		1998, 1995		13.41
10		1971		13.11
89		2024		6.66

 

Annual Precipitation for Period of Record - Click on Graph to Enlarge
Click on Graph to Enlarge

  

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Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	5	10	4.9	4.2	1.7	0	0	0	0	3.1	0.5	1	30.4
Mean Snowfall (1991-2020 Normals)	5.5	7.4	6.5	7.2	2.1	0.0	0.0	0.0	0.6	4.4	5.3	5.3	44.3
Departure from Normal	-0.5	2.6	-1.6	-3.0	-0.4	0.0	0.0	0.0	-0.6	-1.3	-4.8	-4.3	-13.9
Percent of Normal	91	135	75	58	81	0	0	0	0	7	9	19	69
Rank - Least            to           Most  106 years (P.O.R 1918-2024)	71	87	52	59	82	NA	NA	NA	NA	66	27	25	46
Greatest 24-HR Total	2.3	3.2	2.3	2.8	0.9	0	0	0	0	3.1	0.4	1.0	3.2
Dates of Occurrence	11	10	14	1	3	0	0	0	0	30	13	31	2/10
Number of Days with:
Snowfall >= 1.0 inch	2	4	2	1	0	0	0	0	0	1	0	1	11
Daily Snowfall Records Set or Tied	0	0	0	0	0	0	0	0	0	0	0	0	0
*   69 months of May on record a trace or 0.0" of snowfall.  *  83 months of September on record with no snowfall.

 

 

 

 

 

 

 

 

 

 

 

 

Snowfall Ranks and Records:
 

One Day Snowfall Records (inches): 

  There were no daily records in 2024

 

  There were no significant snowy months in 2024.

 

Top Ten Snowiest Years on Record
Rank		Year		Snowfall (inches)
1		2023		92.0
2		1920		77.0
3		2017		71.1
4		2013		70.6
5		2009		62.5
6		2022		61.7
7		2020		61.7
8		2016		61.7
9		2010		60.1
10		1919		58.0
46		2024		30.4

 

Annual and Seasonal Snowfall for Period of Record - Click on Graph to Enlarge

  

 

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Click Here for the complete 2023 summary for Casper

...Highlights of 2023...

• Annual:
  • 24th coldest year on record at 44.6 degrees, just 1 degrees below normal.
  • 11th wettest year with 15.41 inches, 126% of normal.
  • 5th snowiest year with 116.1 inches, 161% of normal.
  • 3rd snowiest snowfall season (July 2022-June 2023) with 134.5 inches.
  • Highest wind gust was 70 mph on April 27th.
     
• Monthly Temperatures: 8th coldest March on record at 26.7 degrees. 3rd warmest December at 32 degrees.
   
• Monthly Precipitation: 1st wettest January, 7th wettest June on record. New all-time daily high precipitation on January 11th with 0.55". 10th wettest October and 2nd driest December on record.
   
• Monthly Snowfall: 2nd snowiest January and April and 10th snowiest February on record. New all-time daily snowfall on April 3rd with 26.7"

Temperatures

Winds

Precipitation

Snow

  

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Average High	27.4	29.9	37.5	51.7	70.3	73.2	88.0	84.5	78.9	59.5	47.6	42.6	57.6
Mean High (1991-2020 Normals)	35.2	37.8	48.8	56.3	66.8	79.6	89	86.7	75.6	59.7	45.9	34.7	59.7
Average Low	14.3	12.0	15.9	26.9	40.1	47.1	51.6	51.8	43.5	30.5	23.5	21.5	31.6
Mean Low (1991-2020 Normals)	15	15.4	22.7	28.2	37.1	45.4	53	51.4	42.2	30.9	22	14.8	31.5
Average Temperature	20.9	20.9	26.7	39.3	55.2	60.2	69.8	68.1	61.2	45.0	35.6	32.0	44.6
Mean Average Temperature (1991-2020 Normals)	25.1	26.6	35.8	42.3	52	62.5	71	69	58.9	45.3	34	24.8	45.6
Departure from Normal	-4.2	-5.7	-9.1	-3	3.2	-2.3	-1.2	-0.9	2.3	-0.3	1.6	7.2	-1.0
Rank: 84 years of record (P.O.R 12/1939-2023)	22	14	8	17	72	18	22	30	65	27	58	82	24
Highest Daily Maximum	39	43	53	72	81	84	101	95	91	78	65	56	101
Date of Occurrence	14,15	26	30	12	22,31	19	17	16,17	1	10	5	6	7/17
Lowest Daily Minimum	-21	-26	-6	3	26	38	40	36	33	2	-10	0	-26
Date of Occurrence	30	23	8	5	1	17,25	7	31	26	27	25	25	2/23
Number of Days with:	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Maximum >= 90°	0	0	0	0	0	0	16	9	1	0	0	0	48
Maximum <= 32°	21	14	9	4	0	0	0	0	0	3	5	3	59
Minimum <= 32°	31	28	30	23	4	0	0	0	0	13	22	27	178
Minimum <= 0°	4	5	1	0	0	0	0	0	0	0	1	1	12
Record High Temperatures Set or Tied	0	0	0	0	0	0	1	0	0	0	0	2	3
Record Low Temperatures Set or Tied	0	2	1	1	0	1	0	1	0	0	0	0	6

Temperature Ranks and Records:
 

 Daily Records:

 
Record High Temperatures:

 

  July: 101 on the 17th. 

  December: 55 on the 19th and 53 on the 21st (tie)

 

Record Low Temperatures:

  February: -17 on the 22nd and -26 on the 23rd.

  March:  -6 on the 8th (tie)

   April: 3 on the 5th
   June: 38 on the 25th (tie).

   August: 39 on the 14th.

    

 

Coldest Months of March on Record
Rank		Year		Average Temperature °F
1		1965		20.4
2		1964		25.1
3		1943		25.8
3		1944		25.8
3		2002		25.8
3		1955		25.8
7		1954		26.2
8		2023		26.7
9		1952		27.0
10		1958,1969		28.4

 

Warmest Months of December on Record
Rank		Year		Average Temperature °F
1		1980		34.3
2		1946		33.0
3		2023		32.0
4		1957/1994		31.8
6		1950		31.2
7		1962		30.4
8		1959		30.3
9		2021		30.1
10		1999		29.9

 

Top Ten Warmest Years on Record
Rank		Year		Average Temperature °F
1		1994		49.1
2		2012		48.7
3		1954		48.3
4		1981		48.1
5		1992		48.0
6		1940, 1953, 1963		47.3
9		2015, 2006, 1999		47.1
61		2023		44.6

 

Top Ten Coldest Years on Record
Rank		Year		Average Temperature °F
1		1985		42.5
2		1951		43.1
3		1978		43.2
4		1964		43.5
5		2019, 1975		43.6
6		2009, 1979, 1968, 1949		43.8
10		1971		43.9
24		2023		44.6

 

Average Annual Temperature for Period of Record - Click on Graph to Enlarge

  

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Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Average Speed (MPH)	15	19.1	13.2	13.4	9.5	8	8.4	8.7	9.4	9.1	14.3	13.7	11.8
Maximum 3-sec Gust	55	58	64	70	51	57	62	64	56	61	52	66	70
Direction	210	220	210	350	230	290	290	280	230	260	280	250	350
Date of Occurrence	9	21	10	27	6	20	3	27	4	10	5	7	4/27
Number of Days with:
2-Min Wind >50 mph	0	0	0	1	0	0	0	0	0	0	0	0	1
Peak Wind >50 mph	2	4	2	4	1	1	6	4	2	1	1	2	30
Peak Wind >70 mph	0	0	0	1	0	0	0	0	0	0	0	0	1

 

 

 

 

 

 

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Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	1.99	0.69	0.65	1.49	2.03	3.29	1.33	1.01	0.59	1.88	0.40	0.06	15.41
Mean Precipitation (1991-2020 Normals)	0.49	0.56	0.84	1.41	2.21	1.34	1.19	0.79	0.95	1.19	0.64	0.61	12.22
Departure from Normal	1.50	0.13	-0.19	0.08	-0.18	1.95	0.14	0.22	-0.36	0.69	-0.24	-0.55	3.19
Percent of Normal	406	123	77	106	92	246	112	128	62	158	63	10	126
Rank -  84 years (P.O.R 12/1939-2023)	84	60	33	53	47	78	60	67	37	74	24	2	74
Greatest 24-HR Total	0.80	0.49	0.39	0.90	0.53	0.88	0.49	0.29	0.23	1.62	0.40	0.04	1.62
Dates of Occurrence	10-11	21-22	22	3	23-24	15-16	20	8	13-14	11-12	23-24	23-24	11-12 Oct
Number of Days with:
Precipitation >= 0.01	11	6	9	9	14	15	11	11	7	7	3	4	107
Precipitation >= 0.10	7	3	1	2	9	9	3	4	2	3	2	0	45
Precipitation >= 1.00	0	0	0	0	0	0	0	0	0	1	0	0	0
Days with Thunderstorms	0	0	0	1	9	23	14	11	6	0	0	0	64
Daily Precipitation Records Set or Tied	5	1	0	2	0	1	0	0	0	1	1	0	11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Precipitation Ranks and Records:

 

One Day Precipitation Records:

   January: 0.27" on the 1st, 0.23" on the 2nd, 0.16" on the 10th, 0.55" on the 11th (all-time high), and 0.17 on the 18th

   February: 0.28h." on the 21st

   April: 0.90" on the 3rd and 0.37" on the 4th

   June: 0.51 on the 4th.

   October: 1.34" on the 12th.

   November: 0.29 on the 23rd (tie).

 

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Top Ten Driest December's on Record
Rank		Year		Precipitation (inches)
1		1952		0.03
2		2023		0.06
3		2004		0.07
4		1998/1999		0.10
6		2001		0.13
7		1969		0.16
8		2002		0.19
9		1974		0.22
10		1958/1962		0.23

 

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Top Ten Wettest January's on Record
Rank		Year		Precipitation (inches)
1		2023		1.99
2		1987		1.42
3		1949		1.36
4		1944		1.30
5		1984		1.19
6		2009		1.08
7		2016		0.99
8		1972		0.99
9		1996		0.94
10		2022		0.90

 

Top Ten Wettest June's on Record
Rank		Year		Precipitation (inches)
1		2003		4.74
2		1982		4.15
3		1986		4.06
4		1983		3.76
5		1967		3.75
6		1995		3.62
7		2023		3.29
8		1947		3.11
9		1993		279
10		1998		2.67

 

Top Ten Wettest October's on Record
Rank		Year		Precipitation (inches)
1		1998		4.62
2		1994		4.17
3		2013		3.03
4		2021		2.69
5		1986		2.63
6		1962		2.49
7		1972		2.04
8		1957/1949		2.00
9		1942		1.95
10		2023		1.88

 

Top Ten Driest Years on Record
Rank		Year		Precipitation (inches)
1		2020		5.79
2		1988		6.56
3		2001		6.76
4		2002		7.05
5		1960		7.34
6		1954		7.70
7		2012		7.88
8		1963		7.90
9		1966		8.14
10		1943		8.91
74		2023		15.41

 

Top Ten Wettest Years on Record
Rank		Year		Precipitation (inches)
1		1982		20.48
2		1995		18.94
3		1983		18.41
4		1978		17.64
5		1941		16.24
6		1957		16.12
7		1986		15.92
8		1993		15.91
9		2009		15.77
10		2016		15.57
11		2023		15.41

 

Annual Precipitation for Period of Record - Click on Graph to Enlarge

  

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Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	37	16.4	9.4	39	0	0	0	0	0	2.8	10.5	1	116.1
Mean Snowfall (1991-2020 Normals)	9	10.9	10.3	10.5	2.6	0.1	0	0	1.5	7	8.9	11	71.8
Departure from Normal	28	5.5	-0.9	28.5	-2.6	-0.1	0.0	0.0	-1.5	-4.2	1.6	-10	44.3
Percent of Normal	411	150	91	371	0	0	0	0	0	40	118	9	162
Rank - Least to Most  84 years (P.O.R 12/1939-2023)	83	75	34	83	NA	NA	NA	NA	NA	26	24	33	82
Greatest 24-HR Total	9	6.8	4.8	26.7	0	0	0	0	0	2.2	6.4	0.6	26.7
Dates of Occurrence	28	22	22	3	NA	NA	NA	NA	NA	26	23	23	04-3
Number of Days with:
Snowfall >= 1.0 inch	9	3	3	4	0	0	0	0	0	1	2	0	22
Daily Snowfall Records Set or Tied	4	2	0	2	0	0	0	0	0	0	1	0	8
* 50 months of September on record with no snowfall.

 

 

 

 

 

 

 

 

 

 

 

Snowfall Ranks and Records:

One Day Snowfall Records (inches):

   January:  7.3" on the first, 5.9" on the 2nd, 5.8" on the 11th and 9" on the 28th

   February: 4.6" on the 21st and 6.8" on the 22nd

    April: 26.7" on the 3rd (all-time highest) and 9.3 on the 4th

    November: 6.4" on the 23rd

       

 

 

Snowiest Months of January on Record
Rank		Year		Snowfall (inches)
1		1949		39.3
2		2023		37.1
3		1987		24.0
4		1980		22.1
5		1984		19.4
6		1972		19.2
7		1965		16.5
8		2009		16.4
9		1979		16.3
10		1996,1962		16.2

 

Snowiest Months of February on Record
Rank		Year		Snowfall (inches)
1		2020		28.4
2		1952		23.8
3		1987		22.7
4		1989,1955		21.5
6		2004		18.9
7		2018		18.6
8		1953		18.5
9		1995		16.9
10		2023		16.4

 

Snowiest Months of April on Record
Rank		Year		Snowfall (inches)
1		1973		56.3
2		2023, 2013		39.0
4		1984		33.6
5		1971		24.2
6		1983		23.3
7		1964		22.8
8		1945		21.9
9		1941		21.5
10		1957		21.2

 

Top Ten Snowiest Years on Record
Rank		Year		Snowfall (inches)
1		1982		137.6
2		1975		124.0
3		1984		121.2
4		1973		118.3
5		2023		116.1
6		1983		114.2
7		1978		112.7
8		2021		108.1
9		2013		107.5
10		1955		103.3

 

Annual and Seasonal Snowfall for Period of Record - Click on Graph to Enlarge

  

 

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