Plymouth, IA
Climate overview — based on NOAA 1991-2020 normals from MASON CITY, IA US.
Year-round temperatures (°F)
Climate summary
Plymouth has an annual average temperature of 45.6°F with about 36.3 inches of precipitation per year. The warmest month is July (average high 81.9°F), and the coldest is January (average low 7.0°F). June is typically the wettest month (5.70 in) and January the driest (0.89 in).
Best time to visit Plymouth
Full guide →Climate change signal
All-time records →37 of 366 (10.1%) of Plymouth'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 | 17 | |
| 1900s | 4 | |
| 1910s | 34 | |
| 1920s | 29 | |
| 1930s | 72 | |
| 1940s | 27 | |
| 1950s | 13 | |
| 1960s | 14 | |
| 1970s | 14 | |
| 1980s | 41 | |
| 1990s | 25 | |
| 2000s | 20 | |
| 2010s | 29 | |
| 2020s | 27 |
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 | 24.0°F | 7.0°F | 15.5°F | 0.89 in | — | 7 |
| February | 28.6°F | 10.9°F | 19.8°F | 1.07 in | — | 7 |
| March | 41.3°F | 23.0°F | 32.1°F | 1.95 in | — | 8 |
| April | 56.4°F | 34.7°F | 45.6°F | 3.91 in | — | 10 |
| May | 68.6°F | 46.9°F | 57.8°F | 5.58 in | — | 13 |
| June | 78.7°F | 57.6°F | 68.2°F | 5.70 in | — | 12 |
| July | 81.9°F | 61.5°F | 71.7°F | 4.63 in | — | 10 |
| August | 79.6°F | 58.8°F | 69.2°F | 3.71 in | — | 9 |
| September | 73.5°F | 50.1°F | 61.8°F | 3.24 in | — | 9 |
| October | 60.1°F | 37.6°F | 48.8°F | 2.55 in | — | 9 |
| November | 43.3°F | 25.2°F | 34.2°F | 1.79 in | — | 6 |
| December | 29.9°F | 14.2°F | 22.0°F | 1.25 in | — | 8 |
Climate twins of Plymouth
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).