Grant County Weather in May
Average highs run from 77°F on May 1 to 87°F on May 31, and lows from 37°F to 45°F. Normal precipitation for the month is 0.39 in over about 3 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 82°F
- Average low
- 41°F
- Precipitation
- 0.39 in
- Record high
- 99°FMay 26, 1951
- Record low
- 23°FMay 1, 1967
- Chance of a freeze
- 80%
- Days of 90°F or more
- 3.2
- Daylight
- 13 h 29 min to 14 h 09 min
- Cloud cover
- 29%
- Humidity
- 27%
- Dew point
- 28°F
- Wind
- 10.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 77°F | 37°F | 86°F 1943 | 23°F 1967 | 7% | 0% |
| May 2 | 77°F | 37°F | 86°F 1910 | 25°F 1954 | 7% | 0% |
| May 3 | 78°F | 38°F | 88°F 1947 | 29°F 1899 | 7% | 0% |
| May 4 | 78°F | 38°F | 88°F 1947 | 26°F 1953 | 7% | 0% |
| May 5 | 78°F | 38°F | 91°F 1947 | 28°F 1935 | 7% | 0% |
| May 6 | 78°F | 38°F | 92°F 1947 | 25°F 1981 | 7% | 0% |
| May 7 | 79°F | 39°F | 91°F 1989 | 25°F 1917 | 7% | 0% |
| May 8 | 79°F | 39°F | 91°F 1989 | 28°F 1917 | 8% | 0% |
| May 9 | 79°F | 39°F | 89°F 2009 | 28°F 1965 | 8% | 0% |
| May 10 | 80°F | 39°F | 88°F 2009 | 29°F 1953 | 8% | 0% |
| May 11 | 80°F | 40°F | 91°F 1996 | 26°F 1953 | 8% | 0% |
| May 12 | 80°F | 40°F | 95°F 1996 | 30°F 1953 | 8% | 0% |
| May 13 | 81°F | 40°F | 92°F 1996 | 29°F 1953 | 8% | 0% |
| May 14 | 81°F | 40°F | 91°F 1954 | 28°F 1981 | 8% | 0% |
| May 15 | 81°F | 41°F | 90°F 2000 | 34°F 1998 | 9% | 0% |
| May 16 | 82°F | 41°F | 90°F 1988 | 29°F 1957 | 9% | 0% |
| May 17 | 82°F | 41°F | 90°F 1970 | 30°F 1962 | 9% | 0% |
| May 18 | 82°F | 41°F | 91°F 1904 | 30°F 1962 | 9% | 0% |
| May 19 | 83°F | 42°F | 91°F 1925 | 34°F 1949 | 9% | 0% |
| May 20 | 83°F | 42°F | 91°F 1925 | 30°F 1917 | 9% | 0% |
| May 21 | 83°F | 42°F | 94°F 1953 | 30°F 1981 | 9% | 0% |
| May 22 | 84°F | 42°F | 96°F 1953 | 28°F 1962 | 9% | 0% |
| May 23 | 84°F | 43°F | 94°F 2000 | 35°F 1909 | 9% | 0% |
| May 24 | 85°F | 43°F | 93°F 2000 | 33°F 1965 | 9% | 0% |
| May 25 | 85°F | 43°F | 96°F 1951 | 35°F 1909 | 9% | 0% |
| May 26 | 85°F | 43°F | 99°F 1951 | 35°F 1959 | 10% | 0% |
| May 27 | 86°F | 44°F | 99°F 1951 | 35°F 1917 | 10% | 0% |
| May 28 | 86°F | 44°F | 96°F 1951 | 34°F 1990 | 10% | 0% |
| May 29 | 86°F | 44°F | 95°F 1951 | 35°F 1953 | 10% | 0% |
| May 30 | 87°F | 45°F | 96°F 2000 | 36°F 1990 | 10% | 0% |
| May 31 | 87°F | 45°F | 95°F 2002 | 31°F 1988 | 10% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:26 AM, sunset 7:55 PM
- May 31
- sunrise 6:07 AM, sunset 8:16 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00291910 (Cliff 11 Se), public domain. Records: NOAA GHCN-Daily, station USC00293265, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.