May weather in West Yellowstone, MT
The average temperature in West Yellowstone in May is °F (°F–°F). Average precipitation: 2.72 inches.
May is a spring month in West Yellowstone, and is cooler than the annual average of 0°F. Expect about 10 days with precipitation. Daylight averages about 14h 37m.
Avg High
°F
Avg Low
°F
Precipitation
2.72 in
Daylight
14h 37m
May records in West Yellowstone
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 77.4°F (2023) | 9.3°F (2019) | 0.20 in (2022) |
| May 2 | 77.2°F (2023) | 11.5°F (2011) | 0.20 in (2009) |
| May 3 | 74.5°F (2023) | 14.4°F (2019) | 0.50 in (2003) |
| May 4 | 74.7°F (2017) | 15.3°F (2024) | 0.30 in (2003) |
| May 5 | 77.4°F (2017) | 12.9°F (2010) | 0.60 in (2025) |
| May 6 | 74.7°F (2017) | 10.6°F (1999) | 0.20 in (1999) |
| May 7 | 71.6°F (2004) | 10.6°F (2010) | 0.60 in (2019) |
| May 8 | 73.2°F (2016) | 14.0°F (2010) | 0.40 in (2000) |
| May 9 | 73.6°F (2007) | 13.5°F (2002) | 0.50 in (2011) |
| May 10 | 77.0°F (2025) | 7.2°F (2022) | 0.40 in (2005) |
| May 11 | 78.1°F (2007) | 16.2°F (2022) | 0.30 in (2008) |
| May 12 | 79.7°F (2007) | 18.0°F (2002) | 0.70 in (1999) |
| May 13 | 80.1°F (2013) | 13.8°F (2004) | 0.50 in (1999) |
| May 14 | 76.6°F (2012) | 19.6°F (2014) | 0.60 in (2009) |
| May 15 | 80.4°F (2012) | 19.0°F (2004) | 1.50 in (2001) |
| May 16 | 78.6°F (2006) | 23.7°F (2009) | 1.00 in (2004) |
| May 17 | 79.0°F (2006) | 23.4°F (2002) | 0.30 in (2019) |
| May 18 | 81.1°F (2006) | 18.1°F (2003) | 0.80 in (2025) |
| May 19 | 77.0°F (2002) | 14.0°F (2003) | 0.50 in (2016) |
| May 20 | 76.6°F (2023) | 14.4°F (2003) | 0.30 in (2010) |
| May 21 | 78.3°F (2023) | 14.7°F (2001) | 1.50 in (2021) |
| May 22 | 76.5°F (2014) | 22.3°F (2021) | 0.60 in (2012) |
| May 23 | 79.7°F (2014) | 21.6°F (2022) | 0.70 in (2018) |
| May 24 | 80.1°F (2001) | 19.8°F (2007) | 0.90 in (2011) |
| May 25 | 79.0°F (2003) | 19.6°F (2005) | 0.70 in (2012) |
| May 26 | 77.9°F (2022) | 19.4°F (2005) | 0.70 in (2011) |
| May 27 | 77.5°F (2003) | 22.3°F (2005) | 0.40 in (2011) |
| May 28 | 84.9°F (2003) | 25.7°F (2005) | 1.00 in (2022) |
| May 29 | 83.7°F (2003) | 23.7°F (2007) | 0.80 in (2011) |
| May 30 | 84.4°F (2020) | 21.0°F (2021) | 0.40 in (2003) |
| May 31 | 82.4°F (2017) | 23.5°F (2006) | 0.30 in (2003) |