Casper Weather Records

Casper, Wyoming weather averages and records from 1900–2022 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Casper, Wyoming was 109 °F which occurred on August 26, 1912.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Casper, Wyoming was -41 °F which occurred on December 21, 1990.
Lowest Temperatures: All-Time By Year
Casper Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 35.5 15.5 72 -40 0.5 9.0
February 38.0 15.9 68 -41 0.6 10.9
March 49.2 23.3 77 -25 0.8 10.3
April 56.5 28.7 84 -8 1.4 10.5
May 67.0 37.5 99 16 2.2 2.6
June 79.8 45.7 102 24 1.3 0.1
July 89.2 53.4 107 26 1.2 0.0
August 86.9 51.8 109 29 0.8 0.0
September 75.8 42.6 103 14 1.0 1.5
October 59.9 31.4 87 -9 1.2 7.0
November 46.0 22.5 80 -27 0.6 8.9
December 35.1 15.2 67 -41 0.6 11.0
Entire year 60.0 32.0 109 -41 12.2 71.3
More Casper Weather Records
1900–2022
Highest daily low 77 °F July 28, 1935
Lowest daily high -25 °F February 3, 1989
Greatest daily range
(Difference of high and low)
66 °F July 13, 1935
Difference in high temperature
over two conscutive days
60 °F Dec 16–17, 1924
Most daily precipitation 2.6 inches September 28, 1923
Most monthly precipitation 6.5 inches May 1978
Most yearly precipitation 21.3 inches 1923
Earliest freeze July 4 1972
Latest freeze June 27 1915
Earliest snow in season September 6 1929
Latest snow in season June 13 1969
Most daily snow 24.3 inches December 24, 1982
Most monthly snow 62.8 inches December 1982
Most yearly snow 137.6 inches 1982
Most days in a year ≥ 80 °F 126 1911
Most days in a year ≥ 90 °F 83 1912
Most days in a year ≥ 100 °F 46 1912
Casper Weather Streaks
Most consecutive days...
With precipitation 12 days May 16–27, 1995
Without precipitation 55 days Sep 30 – Nov 23, 1965
With snow 8 days Feb 20–27, 1962
Freezing temperatures
High temperature ≤ 32 °F
26 days Jan 15 – Feb 9, 1949
High temperature ≥ 80 °F 108 days May 16 – Aug 31, 1912
High temperature ≥ 90 °F 52 days Jul 8 – Aug 28, 1912
High temperature ≥ 100 °F 12 days Jul 31 – Aug 11, 1912
Casper Weather by Year
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Weather Station Details
Years Station Coordinates
1949–2022 Casper-Natrona County International Airport location
1900–1948 Casper 2 E location