May weather in Grand Junction, CO
The average temperature in Grand Junction in May is 63.4°F (50.0°F–76.7°F). Average precipitation: 1.27 inches.
May is a spring month in Grand Junction, and is warmer than the annual average of 54.6°F. Daily temperatures swing about 26.7°F between overnight low and afternoon high. Daylight averages about 14h 8m. For travel, May is one of the best months of the year to visit.
Avg High
76.7°F
Avg Low
50.0°F
Precipitation
1.27 in
Daylight
14h 8m
May records in Grand Junction
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (2020) | 33.1°F (2014) | 0.08 in (2013) |
| May 2 | 82.9°F (2015) | 36.0°F (2013) | 0.10 in (2021) |
| May 3 | 82.9°F (2012) | 36.0°F (2013) | 0.48 in (2021) |
| May 4 | 84.9°F (2012) | 36.0°F (2022) | 0.09 in (2022) |
| May 5 | 87.1°F (2016) | 39.9°F (2024) | 0.03 in (2015) |
| May 6 | 84.9°F (2021) | 37.0°F (2024) | 0.85 in (2015) |
| May 7 | 87.1°F (2021) | 42.1°F (2024) | 0.30 in (2013) |
| May 8 | 87.1°F (2018) | 33.1°F (2024) | 0.29 in (2013) |
| May 9 | 88.0°F (2018) | 41.0°F (2015) | 0.20 in (2016) |
| May 10 | 91.0°F (2018) | 42.1°F (2015) | 0.36 in (2014) |
| May 11 | 84.9°F (2025) | 37.9°F (2014) | 0.78 in (2014) |
| May 12 | 88.0°F (2025) | 34.0°F (2014) | 0.07 in (2014) |
| May 13 | 87.1°F (2013) | 32.0°F (2014) | 0.00 in (2012) |
| May 14 | 89.1°F (2021) | 35.1°F (2014) | 0.13 in (2024) |
| May 15 | 88.0°F (2022) | 41.0°F (2014) | 0.30 in (2015) |
| May 16 | 89.1°F (2022) | 44.1°F (2015) | 0.24 in (2016) |
| May 17 | 90.0°F (2022) | 36.0°F (2017) | 0.33 in (2017) |
| May 18 | 89.1°F (2020) | 37.0°F (2017) | 0.28 in (2025) |
| May 19 | 90.0°F (2022) | 39.9°F (2017) | 0.29 in (2015) |
| May 20 | 84.9°F (2021) | 39.0°F (2017) | 0.09 in (2013) |
| May 21 | 90.0°F (2012) | 35.1°F (2022) | 0.14 in (2024) |
| May 22 | 93.0°F (2012) | 42.1°F (2024) | 0.38 in (2015) |
| May 23 | 89.1°F (2025) | 42.1°F (2024) | 0.43 in (2019) |
| May 24 | 89.1°F (2017) | 42.1°F (2024) | 0.15 in (2015) |
| May 25 | 93.0°F (2018) | 42.1°F (2024) | 0.46 in (2014) |
| May 26 | 93.9°F (2018) | 42.1°F (2024) | 0.07 in (2015) |
| May 27 | 91.0°F (2022) | 44.1°F (2019) | 0.09 in (2019) |
| May 28 | 91.9°F (2014) | 43.0°F (2019) | 0.22 in (2013) |
| May 29 | 95.0°F (2020) | 46.9°F (2015) | 0.30 in (2022) |
| May 30 | 91.9°F (2025) | 43.0°F (2022) | 0.02 in (2014) |
| May 31 | 96.1°F (2025) | 46.9°F (2022) | 0.00 in (2012) |