May weather in Umatilla, OR
The average temperature in Umatilla in May is 60.0°F (48.1°F–71.9°F). Average precipitation: 0.75 inches.
May is a spring month in Umatilla, and is warmer than the annual average of 53.9°F. Daily temperatures swing about 23.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 14h 45m. For travel, May is a comfortable month to visit.
Avg High
71.9°F
Avg Low
48.1°F
Precipitation
0.75 in
Daylight
14h 45m
May records in Umatilla
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 77.0°F (2021) | 35.1°F (2013) | 0.14 in (2021) |
| May 2 | 82.0°F (2015) | 34.0°F (2013) | 0.02 in (2022) |
| May 3 | 82.0°F (2014) | 39.0°F (2008) | 0.41 in (2009) |
| May 4 | 88.0°F (2016) | 39.9°F (2010) | 0.07 in (2014) |
| May 5 | 84.0°F (2017) | 37.9°F (2011) | 0.48 in (2024) |
| May 6 | 81.0°F (2013) | 37.0°F (2010) | 0.16 in (2020) |
| May 7 | 84.0°F (2013) | 28.9°F (2021) | 0.13 in (2020) |
| May 8 | 89.1°F (2013) | 39.0°F (2010) | 0.01 in (2010) |
| May 9 | 89.1°F (2013) | 41.0°F (2024) | 0.24 in (2014) |
| May 10 | 88.0°F (2013) | 41.0°F (2010) | 0.15 in (2018) |
| May 11 | 93.9°F (2013) | 39.9°F (2012) | 0.10 in (2018) |
| May 12 | 93.9°F (2013) | 37.9°F (2012) | 0.20 in (2018) |
| May 13 | 87.1°F (2024) | 37.9°F (2012) | 0.93 in (2015) |
| May 14 | 81.0°F (2012) | 41.0°F (2022) | 0.17 in (2015) |
| May 15 | 84.9°F (2018) | 43.0°F (2017) | 0.54 in (2011) |
| May 16 | 89.1°F (2012) | 43.0°F (2017) | 0.23 in (2016) |
| May 17 | 88.0°F (2021) | 43.0°F (2011) | 0.20 in (2017) |
| May 18 | 89.1°F (2008) | 42.1°F (2011) | 0.40 in (2025) |
| May 19 | 90.0°F (2008) | 45.0°F (2011) | 0.10 in (2020) |
| May 20 | 87.1°F (2008) | 43.0°F (2022) | 0.10 in (2010) |
| May 21 | 93.0°F (2023) | 43.0°F (2010) | 0.15 in (2012) |
| May 22 | 82.9°F (2015) | 42.1°F (2010) | 0.34 in (2019) |
| May 23 | 88.0°F (2014) | 43.0°F (2013) | 0.14 in (2024) |
| May 24 | 91.9°F (2017) | 30.0°F (2021) | 0.18 in (2013) |
| May 25 | 84.9°F (2009) | 30.9°F (2021) | 0.07 in (2013) |
| May 26 | 86.0°F (2025) | 46.0°F (2013) | 0.17 in (2008) |
| May 27 | 80.1°F (2017) | 46.0°F (2011) | 0.32 in (2010) |
| May 28 | 87.1°F (2017) | 44.1°F (2011) | 0.37 in (2010) |
| May 29 | 86.0°F (2017) | 36.0°F (2021) | 0.40 in (2022) |
| May 30 | 87.1°F (2015) | 46.9°F (2021) | 0.16 in (2013) |
| May 31 | 96.1°F (2009) | 46.9°F (2010) | 0.15 in (2020) |