National Weather Service United States Department of Commerce
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--Halloween--
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The weather on Halloween is typically autumn-like with mild temperatures. An occasional cold front will glide through the region about once every three years bringing slightly cooler temperatures and scattered showers. Rain has fallen on Halloween about 33 percent of the time in College Station, Galveston and Houston. Average high temperatures are generally in the mid to upper 70s. October is one of the rare months in Southeast Texas where there is very little variation in high temperatures between coastal and inland locations. Average low temperatures range from the lower 50s over the north, mid 50s central and lower 60s along the coast. Snow has neven fallen on trick or treaters but Jack Frost may have nipped at Mr. Jack O'Lantern a time or two.

Weather conditions vary in October. Some months are unusually quiet while others can be unusually violent. One significant outbreak of unusual weather occurred on Halloween in 1981. Heavy rain fell along a stationary front draped across the area. Rainfall totals averaged 5 to 10 inches along and west of Interstate 45. Some rainfall totals included 6.80 inches in Ft. Bend County, 10 inches in Austin County and 9 inches in both Colorado County and Wharton County.

The following table lists the five warmest, coldest and wettest Halloweens for Houston, Galveston and College Station.

 

Houston (1891-2018)
Average High: 76.6°F
Average Low: 57.1°F
Average Rainfall: 0.24"
Warmest
88°F 2004
88°F 1977
88°F 1972
88°F 1919
87°F 1992
Coldest
29°F 1993
35°F 1980
39°F 1925
40°F 1917
41°F 1991
Wettest
5.14" 2015
3.84" 1909
2.49" 1941
2.26" 2018
2.05" 1974

 

Galveston (1947-2018)
Average High: 75.2°F
Average Low: 64.4°F
Average Rainfall: 0.18
"
Warmest
86°F 2004
84°F 2006
84°F 1998
83°F 2016
82°F 2003
Coldest
39°F 1993
48°F 1991
48°F 1976
49°F 1967
49°F 1949
Wettest
2.97" 2013
2.12" 2018
1.23" 1947
1.07" 1983
0.77" 1981

 

College Station (1902-2018)
Average High: 76.3°F
Average Low: 54.5°F
Average Rainfall: 0.19"
Warmest
90°F 1916
89°F 1992
89°F 1977
89°F 1943
89°F 1938
Coldest
29°F 1993
30°F 1917
35°F 1980
37°F 1991
37°F 1925
Wettest
2.51" 1981
2.10" 1941
1.64" 1959
1.61" 2018
1.55" 1974