Butte Weather in May
Average highs run from 53°F on May 1 to 61°F on May 31, and lows from 31°F to 39°F. Normal precipitation for the month is 0.84 in over about 7 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
- 58°F
- Average low
- 35°F
- Precipitation
- 0.84 in
- Snowfall
- 0.9 in
- Record high
- 80°FMay 29, 2013
- Record low
- 22°FMay 2, 2012
- Chance of a freeze
- 98%
- Daylight
- 16 h 19 min to 18 h 49 min
- Cloud cover
- 75%
- Humidity
- 84%
- Dew point
- 29°F
- Wind
- 4.7 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 | 53°F | 31°F | 69°F 2009 | 28°F 2012 | 18% | 4% |
| May 2 | 54°F | 32°F | 73°F 2009 | 22°F 2012 | 19% | 4% |
| May 3 | 54°F | 32°F | 72°F 2009 | 24°F 1999 | 19% | 4% |
| May 4 | 54°F | 32°F | 73°F 2004 | 26°F 2001 | 19% | 4% |
| May 5 | 55°F | 33°F | 69°F 2004 | 27°F 2000 | 20% | 3% |
| May 6 | 55°F | 33°F | 71°F 2004 | 29°F 2000 | 20% | 3% |
| May 7 | 55°F | 33°F | 69°F 2004 | 30°F 2001 | 20% | 3% |
| May 8 | 56°F | 33°F | 67°F 2005 | 28°F 1999 | 20% | 3% |
| May 9 | 56°F | 33°F | 72°F 2020 | 30°F 1999 | 21% | 2% |
| May 10 | 56°F | 34°F | 70°F 2020 | 29°F 2022 | 21% | 2% |
| May 11 | 57°F | 34°F | 71°F 2005 | 29°F 2000 | 21% | 2% |
| May 12 | 57°F | 34°F | 71°F 2016 | 31°F 1998 | 22% | 2% |
| May 13 | 57°F | 34°F | 75°F 2016 | 30°F 2001 | 22% | 2% |
| May 14 | 57°F | 35°F | 76°F 2016 | 29°F 2013 | 22% | 2% |
| May 15 | 58°F | 35°F | 74°F 2016 | 33°F 2011 | 22% | 1% |
| May 16 | 58°F | 35°F | 73°F 2014 | 31°F 2012 | 23% | 1% |
| May 17 | 58°F | 35°F | 74°F 2014 | 31°F 2013 | 23% | 1% |
| May 18 | 58°F | 35°F | 75°F 2002 | 26°F 2013 | 23% | 1% |
| May 19 | 59°F | 36°F | 77°F 2002 | 26°F 2013 | 24% | 1% |
| May 20 | 59°F | 36°F | 77°F 2002 | 29°F 2013 | 24% | 1% |
| May 21 | 59°F | 36°F | 77°F 2002 | 30°F 2013 | 24% | 1% |
| May 22 | 59°F | 36°F | 72°F 2015 | 35°F 2013 | 25% | 1% |
| May 23 | 59°F | 37°F | 75°F 2006 | 35°F 2026 | 25% | 1% |
| May 24 | 60°F | 37°F | 76°F 2006 | 31°F 2026 | 25% | 1% |
| May 25 | 60°F | 37°F | 77°F 2006 | 37°F 2000 | 26% | 1% |
| May 26 | 60°F | 37°F | 79°F 2006 | 34°F 2001 | 26% | 1% |
| May 27 | 60°F | 38°F | 79°F 2006 | 32°F 2001 | 26% | 0% |
| May 28 | 61°F | 38°F | 78°F 2013 | 33°F 2000 | 27% | 0% |
| May 29 | 61°F | 38°F | 80°F 2013 | 36°F 2000 | 27% | 0% |
| May 30 | 61°F | 38°F | 75°F 2015 | 34°F 2017 | 27% | 0% |
| May 31 | 61°F | 39°F | 77°F 2015 | 37°F 2017 | 28% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- May 1
- sunrise 5:45 AM, sunset 10:04 PM
- May 31
- sunrise 4:30 AM, sunset 11:19 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00505464 (Lazy Mtn), public domain. Records: NOAA GHCN-Daily, station USW00025331, 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.