West Yellowstone Weather in May
Average highs run from 54°F on May 1 to 64°F on May 31, and lows from 25°F to 32°F. Normal precipitation for the month is 2.70 in.
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
- 59°F
- Average low
- 29°F
- Precipitation
- 2.70 in
- Snowfall
- 1.2 in
- Record high
- 84°FMay 31, 2020
- Record low
- 8°FMay 10, 2022
- Chance of a freeze
- 100%
- Daylight
- 14 h 15 min to 15 h 19 min
- Cloud cover
- 73%
- Humidity
- 73%
- Dew point
- 33°F
- Wind
- 4.9 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 | 54°F | 25°F | 74°F 2007 | 11°F 2019 | 5% | |
| May 2 | 54°F | 25°F | 74°F 2007 | 12°F 2011 | 5% | |
| May 3 | 55°F | 26°F | 72°F 2023 | 12°F 2011 | 5% | |
| May 4 | 55°F | 26°F | 72°F 2017 | 15°F 2019 | 4% | |
| May 5 | 55°F | 26°F | 71°F 2017 | 14°F 2010 | 4% | |
| May 6 | 56°F | 26°F | 75°F 2017 | 15°F 2026 | 4% | |
| May 7 | 56°F | 27°F | 73°F 2017 | 10°F 2010 | 4% | |
| May 8 | 57°F | 27°F | 68°F 2013 | 15°F 2010 | 3% | |
| May 9 | 57°F | 27°F | 72°F 2007 | 15°F 2021 | 3% | |
| May 10 | 57°F | 27°F | 74°F 2007 | 8°F 2022 | 3% | |
| May 11 | 58°F | 28°F | 77°F 2025 | 8°F 2022 | 3% | |
| May 12 | 58°F | 28°F | 78°F 2007 | 17°F 2015 | 3% | |
| May 13 | 59°F | 28°F | 79°F 2007 | 17°F 2014 | 2% | |
| May 14 | 59°F | 28°F | 80°F 2026 | 20°F 2010 | 2% | |
| May 15 | 59°F | 28°F | 75°F 2012 | 20°F 2010 | 2% | |
| May 16 | 60°F | 29°F | 78°F 2012 | 23°F 2010 | 2% | |
| May 17 | 60°F | 29°F | 77°F 2012 | 22°F 2026 | 2% | |
| May 18 | 60°F | 29°F | 78°F 2007 | 20°F 2011 | 1% | |
| May 19 | 61°F | 29°F | 78°F 2007 | 14°F 2026 | 1% | |
| May 20 | 61°F | 30°F | 78°F 2007 | 21°F 2011 | 1% | |
| May 21 | 61°F | 30°F | 74°F 2007 | 21°F 2009 | 1% | |
| May 22 | 61°F | 30°F | 77°F 2023 | 19°F 2026 | 1% | |
| May 23 | 62°F | 30°F | 75°F 2014 | 21°F 2021 | 1% | |
| May 24 | 62°F | 30°F | 77°F 2014 | 24°F 2022 | 1% | |
| May 25 | 62°F | 31°F | 75°F 2007 | 25°F 2012 | 1% | |
| May 26 | 62°F | 31°F | 77°F 2026 | 25°F 2017 | 1% | |
| May 27 | 63°F | 31°F | 75°F 2014 | 25°F 2011 | 1% | |
| May 28 | 63°F | 31°F | 79°F 2026 | 23°F 2011 | 1% | |
| May 29 | 63°F | 31°F | 82°F 2026 | 23°F 2011 | 0% | |
| May 30 | 63°F | 31°F | 81°F 2020 | 23°F 2021 | 0% | |
| May 31 | 64°F | 32°F | 84°F 2020 | 21°F 2011 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:14 AM, sunset 8:29 PM
- May 31
- sunrise 5:43 AM, sunset 9:02 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00248858 (W Yellowstone Gateway), public domain. Records: NOAA GHCN-Daily, station USC00248858, 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.