Thermopolis Weather Records

Thermopolis, Wyoming weather averages and records from 1899–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Thermopolis, Wyoming was 107 °F which occurred on July 25, 1929.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Thermopolis, Wyoming was -44 °F which occurred on January 16, 1930.
Lowest Temperatures: All-Time By Year
Thermopolis Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 37.3 11.5 67 -44 0.4 5.3
February 41.6 15.6 70 -42 0.4 4.8
March 54.0 25.6 80 -28 0.8 4.0
April 61.8 33.4 89 -6 1.5 2.5
May 71.4 42.5 98 12 1.9 0.2
June 82.9 50.6 105 24 1.3 0.0
July 91.8 57.1 107 34 0.8 0.0
August 89.8 55.0 106 23 0.5 0.0
September 79.7 45.7 104 7 1.0 0.3
October 64.5 33.8 92 -11 1.2 2.2
November 48.5 21.7 77 -28 0.7 5.3
December 37.5 12.3 78 -38 0.4 5.6
Entire year 63.5 33.9 107 -44 10.7 30.7
More Thermopolis Weather Records
1899–2024
Highest daily low 77 °F August 18, 2023
Lowest daily high -17 °F January 28, 1916
Greatest daily range
(Difference of high and low)
68 °F October 8, 1920
Greatest difference in daily high
over two conscutive days
48 °F Feb 21–22, 2022
Most daily precipitation 4.9 inches September 30, 1923
Most monthly precipitation 8.3 inches April 1904
Most yearly precipitation 23.7 inches 1923
Most yearly days with precipitation 83 2004
Earliest snow in season September 7 2020
Latest snow in season June 4 1937
Most daily snow 18.0 inches April 6, 1922
Most monthly snow 41.0 inches March 1998
Most yearly snow 78.2 inches 1912
Most snow in a winter 79.0 inches 1997–1998
Greatest snow accumulation 25.0 inches January 31, 1936
Earliest freeze August 25 1910
Earliest day ≥ 80 °F March 31 2012
Earliest day ≥ 90 °F May 7 1934
Earliest day ≥ 100 °F June 9 1902
Latest freeze June 24 1904
Latest day ≥ 80 °F October 29 1937
Latest day ≥ 90 °F October 19 2003
Latest day ≥ 100 °F September 8 2022
Most days in a year < 0 °F 53 1922
Most days in a year < 32 °F 203 1916
Most days in a year ≥ 80 °F 128 2001
Most days in a year ≥ 90 °F 78 1936
Most days in a year ≥ 100 °F 19 1936
Thermopolis Weather Streaks
Most consecutive days...
With precipitation 12 days Jun 3–14, 1998
Without precipitation 88 days Jun 14 – Sep 9, 1932
With snow 8 days Apr 9–16, 1927
High temperature at or
below freezing
25 days Jan 6–30, 1930
High temperature ≥ 80 °F 86 days Jun 9 – Sep 2, 1953
High temperature ≥ 90 °F 49 days Jun 30 – Aug 17, 2003
High temperature ≥ 100 °F 8 days Jul 19–26, 1936
Plant Hardiness Zone
5A
Thermopolis is in plant hardiness zone 5A
based on average yearly minimum temperature from 1991–2020
Thermopolis Weather by Year
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Weather Station Details
Years Station Coordinates
1899–2024 Thermopolis location