May weather in Castle Valley, UT
The average temperature in Castle Valley in May is 63.3°F (49.9°F–76.6°F). Average precipitation: 0.88 inches.
May is a spring month in Castle Valley, and is warmer than the annual average of 54.7°F. Daily temperatures swing about 26.7°F between overnight low and afternoon high. Daylight averages about 14h 6m. For travel, May is a comfortable month to visit.
Avg High
76.6°F
Avg Low
49.9°F
Precipitation
0.88 in
Daylight
14h 6m
May records in Castle Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2020) | 35.1°F (2016) | 0.22 in (2019) |
| May 2 | 88.0°F (2020) | 34.0°F (2019) | 0.07 in (2018) |
| May 3 | 88.0°F (2020) | 37.9°F (2018) | 0.22 in (2018) |
| May 4 | 82.0°F (2020) | 30.9°F (2022) | 0.08 in (2022) |
| May 5 | 82.0°F (2017) | 37.9°F (2022) | 0.01 in (2015) |
| May 6 | 88.0°F (2017) | 33.1°F (2024) | 0.68 in (2024) |
| May 7 | 86.0°F (2021) | 39.0°F (2024) | 0.04 in (2015) |
| May 8 | 87.1°F (2021) | 32.0°F (2024) | 0.10 in (2016) |
| May 9 | 86.0°F (2018) | 32.0°F (2024) | 0.53 in (2016) |
| May 10 | 89.1°F (2018) | 39.0°F (2024) | 0.42 in (2017) |
| May 11 | 90.0°F (2018) | 36.0°F (2015) | 0.05 in (2020) |
| May 12 | 82.9°F (2018) | 39.0°F (2021) | 0.02 in (2020) |
| May 13 | 82.9°F (2017) | 44.1°F (2016) | 0.00 in (2015) |
| May 14 | 84.9°F (2021) | 46.9°F (2017) | 0.00 in (2015) |
| May 15 | 88.0°F (2021) | 44.1°F (2015) | 0.32 in (2015) |
| May 16 | 90.0°F (2022) | 35.1°F (2023) | 0.14 in (2015) |
| May 17 | 89.1°F (2022) | 42.1°F (2015) | 0.47 in (2016) |
| May 18 | 89.1°F (2020) | 43.0°F (2019) | 0.24 in (2017) |
| May 19 | 89.1°F (2020) | 37.9°F (2017) | 0.18 in (2015) |
| May 20 | 90.0°F (2022) | 37.0°F (2017) | 0.17 in (2015) |
| May 21 | 88.0°F (2021) | 36.0°F (2022) | 0.02 in (2019) |
| May 22 | 86.0°F (2018) | 36.0°F (2024) | 0.31 in (2021) |
| May 23 | 81.0°F (2020) | 39.9°F (2019) | 0.47 in (2019) |
| May 24 | 82.9°F (2018) | 39.0°F (2019) | 0.37 in (2019) |
| May 25 | 89.1°F (2017) | 41.0°F (2019) | 0.00 in (2015) |
| May 26 | 91.0°F (2018) | 42.1°F (2024) | 0.15 in (2024) |
| May 27 | 91.0°F (2022) | 46.0°F (2019) | 0.07 in (2019) |
| May 28 | 91.0°F (2022) | 37.9°F (2019) | 0.15 in (2019) |
| May 29 | 91.9°F (2020) | 44.1°F (2019) | 0.01 in (2019) |
| May 30 | 95.0°F (2020) | 46.0°F (2019) | 0.12 in (2022) |
| May 31 | 93.0°F (2020) | 41.0°F (2022) | 0.22 in (2020) |