Box Elder County Weather in May
Average highs run from 60°F on May 1 to 70°F on May 31, and lows from 37°F to 45°F. Normal precipitation for the month is 1.50 in over about 10 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
- 65°F
- Average low
- 41°F
- Precipitation
- 1.50 in
- Record high
- 99°FMay 30, 2003
- Record low
- 17°FMay 18, 1991
- Chance of a freeze
- 89%
- Daylight
- 14 h 01 min to 14 h 58 min
- Cloud cover
- 59%
- Humidity
- 47%
- Dew point
- 36°F
- Wind
- 8.5 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 | 60°F | 37°F | 85°F 2007 | 23°F 2011 | 27% |
| May 2 | 60°F | 37°F | 83°F 2015 | 20°F 2008 | 27% |
| May 3 | 60°F | 38°F | 87°F 2000 | 24°F 2019 | 28% |
| May 4 | 61°F | 38°F | 89°F 2004 | 26°F 2011 | 28% |
| May 5 | 61°F | 38°F | 83°F 1992 | 30°F 1991 | 28% |
| May 6 | 61°F | 39°F | 87°F 1990 | 28°F 1999 | 29% |
| May 7 | 62°F | 39°F | 84°F 2004 | 26°F 2011 | 29% |
| May 8 | 62°F | 39°F | 83°F 1991 | 25°F 2002 | 29% |
| May 9 | 63°F | 40°F | 85°F 2001 | 24°F 2002 | 29% |
| May 10 | 63°F | 40°F | 90°F 2025 | 23°F 1999 | 30% |
| May 11 | 63°F | 40°F | 92°F 2026 | 22°F 1999 | 30% |
| May 12 | 64°F | 40°F | 92°F 2026 | 26°F 2000 | 30% |
| May 13 | 64°F | 41°F | 92°F 2013 | 25°F 1998 | 30% |
| May 14 | 64°F | 41°F | 91°F 2013 | 26°F 1999 | 30% |
| May 15 | 65°F | 41°F | 87°F 2012 | 35°F 1995 | 30% |
| May 16 | 65°F | 42°F | 88°F 2006 | 31°F 1999 | 31% |
| May 17 | 65°F | 42°F | 90°F 2006 | 30°F 1999 | 31% |
| May 18 | 66°F | 42°F | 94°F 2008 | 17°F 1991 | 31% |
| May 19 | 66°F | 42°F | 90°F 2007 | 30°F 2026 | 31% |
| May 20 | 66°F | 43°F | 89°F 1993 | 29°F 2003 | 31% |
| May 21 | 67°F | 43°F | 92°F 2012 | 30°F 2024 | 31% |
| May 22 | 67°F | 43°F | 91°F 2012 | 29°F 2007 | 31% |
| May 23 | 67°F | 43°F | 91°F 2000 | 26°F 2011 | 31% |
| May 24 | 68°F | 44°F | 91°F 2001 | 30°F 2024 | 31% |
| May 25 | 68°F | 44°F | 92°F 2001 | 30°F 2024 | 31% |
| May 26 | 68°F | 44°F | 90°F 2003 | 30°F 2024 | 30% |
| May 27 | 68°F | 44°F | 91°F 2014 | 30°F 2024 | 30% |
| May 28 | 69°F | 45°F | 96°F 2003 | 36°F 2006 | 30% |
| May 29 | 69°F | 45°F | 98°F 2003 | 31°F 2006 | 30% |
| May 30 | 69°F | 45°F | 99°F 2003 | 34°F 2006 | 29% |
| May 31 | 70°F | 45°F | 98°F 2003 | 27°F 2011 | 29% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:29 AM, sunset 8:30 PM
- May 31
- sunrise 6:01 AM, sunset 8:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00427408 (Rosette), public domain. Records: NOAA GHCN-Daily, station USC00428978, 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.