Mountain Home Weather in May
Average highs run from 68°F on May 1 to 79°F on May 31, and lows from 40°F to 48°F.
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
- 74°F
- Average low
- 45°F
- Record high
- 104°FMay 28, 2003
- Record low
- 24°FMay 1, 1972
- Chance of a freeze
- 54%
- Days of 90°F or more
- 2.7
- Daylight
- 14 h 08 min to 15 h 09 min
- Cloud cover
- 58%
- Humidity
- 50%
- Dew point
- 37°F
- Wind
- 8.3 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 68°F | 40°F | 95°F 1985 | 24°F 1972 | |
| May 2 | 68°F | 40°F | 92°F 1966 | 28°F 1997 | |
| May 3 | 69°F | 41°F | 96°F 1966 | 27°F 1964 | |
| May 4 | 69°F | 41°F | 97°F 1966 | 27°F 1964 | |
| May 5 | 69°F | 41°F | 95°F 1966 | 24°F 1982 | |
| May 6 | 70°F | 42°F | 92°F 1987 | 25°F 1965 | |
| May 7 | 70°F | 42°F | 95°F 1987 | 27°F 1968 | |
| May 8 | 71°F | 42°F | 94°F 1987 | 24°F 1995 | |
| May 9 | 71°F | 43°F | 90°F 1987 | 32°F 1983 | |
| May 10 | 72°F | 43°F | 95°F 1940 | 27°F 1999 | |
| May 11 | 72°F | 43°F | 96°F 1941 | 26°F 1942 | |
| May 12 | 72°F | 44°F | 94°F 1988 | 25°F 1943 | |
| May 13 | 73°F | 44°F | 93°F 1976 | 26°F 1943 | |
| May 14 | 73°F | 44°F | 95°F 2012 | 28°F 1943 | |
| May 15 | 74°F | 45°F | 94°F 2006 | 31°F 1966 | |
| May 16 | 74°F | 45°F | 95°F 1964 | 26°F 1974 | |
| May 17 | 74°F | 45°F | 95°F 1973 | 27°F 1942 | |
| May 18 | 75°F | 45°F | 94°F 2006 | 30°F 1943 | |
| May 19 | 75°F | 46°F | 101°F 2009 | 29°F 2003 | |
| May 20 | 75°F | 46°F | 93°F 1980 | 31°F 1971 | |
| May 21 | 76°F | 46°F | 97°F 1980 | 33°F 1974 | |
| May 22 | 76°F | 46°F | 96°F 2012 | 31°F 1986 | |
| May 23 | 76°F | 47°F | 97°F 1969 | 31°F 1966 | |
| May 24 | 77°F | 47°F | 98°F 2001 | 29°F 1944 | |
| May 25 | 77°F | 47°F | 96°F 2001 | 26°F 1975 | |
| May 26 | 77°F | 47°F | 97°F 1966 | 33°F 1973 | |
| May 27 | 78°F | 48°F | 99°F 1983 | 37°F 1945 | |
| May 28 | 78°F | 48°F | 104°F 2003 | 33°F 1982 | |
| May 29 | 78°F | 48°F | 99°F 1984 | 34°F 1976 | |
| May 30 | 79°F | 48°F | 98°F 1986 | 38°F 1938 | |
| May 31 | 79°F | 48°F | 98°F 1972 | 33°F 1978 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:36 AM, sunset 8:44 PM
- May 31
- sunrise 6:06 AM, sunset 9:15 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00106174 (Mtn Home), public domain. Records: NOAA GHCN-Daily, station USC00101195, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.