Patterson, IA
Climate overview — based on NOAA 1991-2020 normals from WINTERSET 1S, IA US.
Year-round temperatures (°F)
Climate summary
Patterson has an annual average temperature of 48.1°F with about 34.8 inches of precipitation per year and 30.7 inches of snow. The warmest month is July (average high 83.8°F), and the coldest is January (average low 9.8°F). May is typically the wettest month (4.99 in) and January the driest (0.78 in). Snow typically falls from October through April.
Best time to visit Patterson
Full guide →Climate change signal
All-time records →25 of 366 (6.8%) of Patterson'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.
| 1890s | 25 | |
| 1900s | 16 | |
| 1910s | 26 | |
| 1920s | 36 | |
| 1930s | 97 | |
| 1940s | 16 | |
| 1950s | 26 | |
| 1960s | 13 | |
| 1970s | 16 | |
| 1980s | 24 | |
| 1990s | 18 | |
| 2000s | 17 | |
| 2010s | 17 | |
| 2020s | 19 |
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 | 29.9°F | 9.8°F | 19.9°F | 0.78 in | 7.3 in | 5 |
| February | 34.8°F | 13.2°F | 24.0°F | 1.28 in | 8.3 in | 6 |
| March | 47.6°F | 24.8°F | 36.2°F | 2.12 in | 4.7 in | 7 |
| April | 60.5°F | 35.4°F | 48.0°F | 3.59 in | 0.8 in | 10 |
| May | 70.8°F | 48.0°F | 59.4°F | 4.99 in | 0.1 in | 12 |
| June | 80.0°F | 58.3°F | 69.2°F | 4.64 in | — | 10 |
| July | 83.8°F | 62.2°F | 73.0°F | 4.10 in | — | 10 |
| August | 82.3°F | 59.4°F | 70.9°F | 3.62 in | — | 9 |
| September | 75.6°F | 50.6°F | 63.1°F | 3.60 in | — | 7 |
| October | 63.3°F | 38.3°F | 50.8°F | 2.88 in | 0.9 in | 8 |
| November | 48.1°F | 26.0°F | 37.1°F | 1.96 in | 2.7 in | 6 |
| December | 35.1°F | 15.9°F | 25.5°F | 1.23 in | 5.9 in | 6 |
Climate twins of Patterson
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).