Casper May Weather

Averages and records for weather in Casper, Wyoming in the month of May.
Typical Casper May Weather
1991–2020
Average daily high 67.0 °F
Average daily low 37.5 °F
Average monthly precipitation 2.2 inches
Average monthly snow 2.6 inches
Daily chance of precipitation 35.6%
Daily chance of snow 5.1%
Casper May Weather Records
1900–2024
Highest temperature 99 °F May 27, 1912
Lowest temperature 16 °F May 12, 1953
Highest daily low 65 °F May 29, 1934
Lowest daily high 29 °F May 1, 1954
Hottest average high temperature 81.6 °F 1934
Coldest average high temperature 58.2 °F 1935
Most daily precipitation 2.2 inches May 17, 2000
Most monthly precipitation 6.5 inches 1978
Most daily snow 14.0 inches May 11, 1922
Most monthly snow 24.6 inches 1978
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
May 1 61.2 32.5 81 17
May 2 61.6 32.8 82 17
May 3 62.0 33.1 83 17
May 4 62.6 33.5 85 24
May 5 62.9 33.8 88 20
May 6 63.3 34.2 87 20
May 7 63.7 34.5 89 21
May 8 63.9 34.8 87 18
May 9 64.2 35.1 87 18
May 10 64.5 35.5 85 20
May 11 64.9 35.9 85 17
May 12 65.3 36.2 87 16
May 13 65.7 36.6 88 22
May 14 66.2 36.9 89 22
May 15 66.7 37.3 87 26
May 16 67.2 37.6 89 25
May 17 67.6 38.0 99 28
May 18 68.0 38.4 93 28
May 19 68.4 38.6 94 27
May 20 68.7 39.0 89 24
May 21 69.0 39.3 89 26
May 22 69.4 39.5 93 22
May 23 70.0 39.9 97 28
May 24 70.4 40.3 93 26
May 25 70.9 40.6 89 27
May 26 71.5 41.0 91 29
May 27 71.9 41.3 99 30
May 28 72.2 41.6 92 29
May 29 72.6 41.9 95 30
May 30 72.9 42.1 97 29
May 31 73.2 42.2 91 27
Weather Station Details
Years Station Coordinates
1949–2024 Casper-Natrona County International Airport location
1900–1948 Casper 2 E location