May weather in Rock Springs, WY
The average temperature in Rock Springs in May is 52.3°F (37.4°F–67.3°F). Average precipitation: 1.88 inches. Average snowfall is 0.5 inches.
May is a spring month in Rock Springs, and is warmer than the annual average of 45°F. Daily temperatures swing about 29.9°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 21m. For travel, May is cool.
Avg High
67.3°F
Avg Low
37.4°F
Precipitation
1.88 in
Snow
0.5 in
May records in Rock Springs
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 78.1°F (2021) | 21.0°F (2014) | 0.25 in (2019) |
| May 2 | 75.0°F (2023) | 21.9°F (2011) | 0.59 in (2018) |
| May 3 | 77.0°F (2014) | 18.0°F (2013) | 0.16 in (2007) |
| May 4 | 78.1°F (2004) | 21.9°F (2024) | 0.23 in (2006) |
| May 5 | 78.1°F (2004) | 21.0°F (2010) | 0.85 in (2007) |
| May 6 | 77.0°F (2004) | 24.1°F (2012) | 0.40 in (2007) |
| May 7 | 78.1°F (2017) | 21.0°F (2010) | 1.84 in (2016) |
| May 8 | 77.0°F (2011) | 27.0°F (2010) | 0.86 in (2016) |
| May 9 | 77.0°F (2018) | 26.1°F (2021) | 0.83 in (2003) |
| May 10 | 80.1°F (2025) | 21.9°F (2006) | 0.55 in (2010) |
| May 11 | 80.1°F (2007) | 26.1°F (2008) | 1.25 in (2018) |
| May 12 | 80.1°F (2007) | 28.0°F (2014) | 0.24 in (2010) |
| May 13 | 82.9°F (2013) | 27.0°F (2014) | 0.17 in (2008) |
| May 14 | 82.0°F (2013) | 30.0°F (2010) | 0.16 in (2018) |
| May 15 | 81.0°F (2012) | 32.0°F (2004) | 0.29 in (2015) |
| May 16 | 81.0°F (2012) | 32.0°F (2009) | 0.08 in (2013) |
| May 17 | 82.0°F (2006) | 32.0°F (2011) | 0.42 in (2005) |
| May 18 | 82.9°F (2009) | 27.0°F (2017) | 0.42 in (2011) |
| May 19 | 82.9°F (2009) | 27.0°F (2003) | 0.93 in (2015) |
| May 20 | 82.9°F (2008) | 28.0°F (2017) | 0.78 in (2013) |
| May 21 | 82.9°F (2008) | 25.0°F (2022) | 0.51 in (2019) |
| May 22 | 79.0°F (2009) | 28.9°F (2022) | 0.40 in (2015) |
| May 23 | 82.9°F (2003) | 30.0°F (2007) | 0.37 in (2007) |
| May 24 | 81.0°F (2003) | 28.9°F (2007) | 0.68 in (2015) |
| May 25 | 81.0°F (2003) | 30.0°F (2010) | 0.25 in (2015) |
| May 26 | 82.9°F (2003) | 32.0°F (2019) | 0.07 in (2009) |
| May 27 | 84.0°F (2003) | 28.9°F (2012) | 0.67 in (2008) |
| May 28 | 88.0°F (2003) | 28.9°F (2012) | 0.35 in (2019) |
| May 29 | 88.0°F (2003) | 30.0°F (2006) | 0.83 in (2011) |
| May 30 | 84.9°F (2003) | 32.0°F (2011) | 0.66 in (2011) |
| May 31 | 82.9°F (2025) | 32.0°F (2011) | 0.24 in (2005) |