Monmouth, OR
Climate overview — based on NOAA 1991-2020 normals from DALLAS 2 NE, OR US.
Year-round temperatures (°F)
Climate summary
Monmouth has an annual average temperature of 53.1°F with about 47.8 inches of precipitation per year. The warmest month is August (average high 83.1°F), and the coldest is December (average low 34.8°F). December is typically the wettest month (8.74 in) and July the driest (0.31 in).
Best time to visit Monmouth
Full guide →Climate change signal
All-time records →49 of 366 (13.4%) of Monmouth's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1930s | 24 | |
| 1940s | 47 | |
| 1950s | 39 | |
| 1960s | 53 | |
| 1970s | 47 | |
| 1980s | 43 | |
| 1990s | 28 | |
| 2000s | 32 | |
| 2010s | 21 | |
| 2020s | 32 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 46.6°F | 35.2°F | 40.9°F | 7.48 in | — | — |
| February | 50.6°F | 35.6°F | 43.1°F | 5.56 in | — | — |
| March | 55.8°F | 37.6°F | 46.7°F | 5.08 in | — | — |
| April | 60.7°F | 40.2°F | 50.4°F | 3.71 in | — | — |
| May | 68.3°F | 45.1°F | 56.7°F | 2.36 in | — | — |
| June | 73.2°F | 48.8°F | 61.0°F | 1.49 in | — | — |
| July | 82.5°F | 52.1°F | 67.3°F | 0.31 in | — | — |
| August | 83.1°F | 52.1°F | 67.6°F | 0.47 in | — | — |
| September | 77.6°F | 49.1°F | 63.4°F | 1.60 in | — | — |
| October | 64.5°F | 43.8°F | 54.2°F | 3.80 in | — | — |
| November | 52.1°F | 38.4°F | 45.3°F | 7.18 in | — | — |
| December | 45.5°F | 34.8°F | 40.1°F | 8.74 in | — | — |
Climate twins of Monmouth
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).