August weather in Umatilla, OR
The average temperature in Umatilla in August is 74.3°F (60.8°F–87.7°F). Average precipitation: 0.25 inches.
August is a summer month in Umatilla, and is warmer than the annual average of 53.9°F. Daily temperatures swing about 26.9°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 57m. For travel, August is a comfortable month to visit.
Avg High
87.7°F
Avg Low
60.8°F
Precipitation
0.25 in
Daylight
13h 57m
August records in Umatilla
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.9°F (2018) | 52.0°F (2008) | 0.00 in (2007) |
| August 2 | 100.0°F (2015) | 60.1°F (2016) | 0.04 in (2013) |
| August 3 | 102.0°F (2009) | 57.0°F (2008) | 0.01 in (2013) |
| August 4 | 99.0°F (2024) | 55.0°F (2008) | 0.01 in (2024) |
| August 5 | 100.9°F (2024) | 55.9°F (2008) | 0.01 in (2009) |
| August 6 | 99.0°F (2009) | 57.0°F (2022) | 0.00 in (2007) |
| August 7 | 102.9°F (2012) | 55.9°F (2022) | 0.03 in (2009) |
| August 8 | 100.0°F (2012) | 55.9°F (2020) | 0.05 in (2009) |
| August 9 | 98.1°F (2017) | 51.1°F (2021) | 0.20 in (2008) |
| August 10 | 93.9°F (2017) | 57.0°F (2021) | 0.03 in (2019) |
| August 11 | 100.0°F (2018) | 54.0°F (2007) | 0.00 in (2007) |
| August 12 | 100.0°F (2021) | 53.1°F (2007) | 0.10 in (2019) |
| August 13 | 99.0°F (2015) | 57.9°F (2011) | 0.14 in (2014) |
| August 14 | 100.0°F (2012) | 55.0°F (2007) | 0.87 in (2014) |
| August 15 | 98.1°F (2012) | 55.9°F (2020) | 0.13 in (2014) |
| August 16 | 106.0°F (2023) | 55.0°F (2017) | 0.00 in (2007) |
| August 17 | 99.0°F (2023) | 54.0°F (2011) | 0.04 in (2025) |
| August 18 | 100.0°F (2010) | 30.9°F (2021) | 0.01 in (2018) |
| August 19 | 99.0°F (2020) | 57.0°F (2021) | 0.14 in (2008) |
| August 20 | 96.1°F (2012) | 55.9°F (2023) | 0.01 in (2008) |
| August 21 | 96.1°F (2022) | 39.0°F (2021) | 0.07 in (2008) |
| August 22 | 98.1°F (2022) | 53.1°F (2008) | 0.05 in (2019) |
| August 23 | 98.1°F (2022) | 52.0°F (2008) | 0.03 in (2023) |
| August 24 | 91.9°F (2025) | 53.1°F (2016) | 0.03 in (2024) |
| August 25 | 96.1°F (2025) | 51.1°F (2021) | 0.01 in (2011) |
| August 26 | 96.1°F (2011) | 50.0°F (2012) | 0.08 in (2013) |
| August 27 | 93.0°F (2015) | 53.1°F (2008) | 0.11 in (2018) |
| August 28 | 97.0°F (2011) | 51.1°F (2007) | 0.01 in (2025) |
| August 29 | 95.0°F (2023) | 48.9°F (2024) | 0.01 in (2009) |
| August 30 | 93.9°F (2016) | 48.9°F (2024) | 0.02 in (2013) |
| August 31 | 96.1°F (2007) | 51.1°F (2008) | 0.05 in (2015) |