Western and Central Wyoming

Weather Forecast Office

Riverton 2023 Annual Climate Summary

...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

Temperature Banner

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

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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Precipitation Banner

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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Snow Banner

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

Learn more about the National Weather Service's efforts to build a Weather-Ready Nation!

Heavy Rainfall in the Southwest; Scattered Severe Thunderstorms in the Mid-Atlantic

Riverton 2023 Annual Climate Summary

Precipitation Ranks and Records:

Snowfall Ranks and Records: