Keystone, IA
Climate overview — based on NOAA 1991-2020 normals from BELLE PLAINE, IA US.
Year-round temperatures (°F)
Climate summary
Keystone has an annual average temperature of 48.2°F with about 36 inches of precipitation per year and 27.9 inches of snow. The warmest month is July (average high 83.6°F), and the coldest is January (average low 10.4°F). June is typically the wettest month (5.23 in) and January the driest (1.11 in). Snow typically falls from October through April.
Best time to visit Keystone
Full guide →Climate change signal
All-time records →22 of 366 (6%) of Keystone'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 | 15 | |
| 1900s | 13 | |
| 1910s | 20 | |
| 1920s | 44 | |
| 1930s | 96 | |
| 1940s | 21 | |
| 1950s | 30 | |
| 1960s | 15 | |
| 1970s | 7 | |
| 1980s | 33 | |
| 1990s | 14 | |
| 2000s | 18 | |
| 2010s | 30 | |
| 2020s | 10 |
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 | 28.1°F | 10.4°F | 19.3°F | 1.11 in | 7.8 in | 6 |
| February | 32.8°F | 14.3°F | 23.5°F | 1.28 in | 7.4 in | 6 |
| March | 46.0°F | 25.8°F | 35.9°F | 2.03 in | 3.4 in | 7 |
| April | 60.0°F | 37.1°F | 48.6°F | 3.68 in | 0.8 in | 10 |
| May | 70.9°F | 49.2°F | 60.1°F | 4.43 in | — | 12 |
| June | 80.3°F | 59.7°F | 70.0°F | 5.23 in | — | 12 |
| July | 83.6°F | 62.9°F | 73.3°F | 4.06 in | — | 8 |
| August | 82.1°F | 60.2°F | 71.1°F | 4.08 in | — | 9 |
| September | 75.8°F | 51.1°F | 63.5°F | 3.55 in | — | 7 |
| October | 62.9°F | 39.0°F | 51.0°F | 2.86 in | 0.4 in | 8 |
| November | 47.2°F | 27.1°F | 37.2°F | 2.11 in | 1.8 in | 6 |
| December | 33.6°F | 16.8°F | 25.2°F | 1.58 in | 6.3 in | 7 |
Climate twins of Keystone
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).