Chesterfield, MO
Climate overview — based on NOAA 1991-2020 normals from ST CHARLES 7 SSW, MO US.
Year-round temperatures (°F)
Climate summary
Chesterfield has an annual average temperature of 56.3°F with about 42.3 inches of precipitation per year and 8.1 inches of snow. The warmest month is July (average high 88.8°F), and the coldest is January (average low 21.9°F). May is typically the wettest month (5.22 in) and February the driest (2.19 in). Snow typically falls from November through March.
Best time to visit Chesterfield
Full guide →Climate change signal
All-time records →85 of 366 (23.2%) of Chesterfield'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.
| 1970s | 32 | |
| 1980s | 104 | |
| 1990s | 57 | |
| 2000s | 45 | |
| 2010s | 79 | |
| 2020s | 49 |
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 | 40.2°F | 21.9°F | 31.0°F | 2.56 in | 4.2 in | 7 |
| February | 45.5°F | 25.4°F | 35.4°F | 2.19 in | 1.1 in | 8 |
| March | 55.5°F | 34.6°F | 45.1°F | 3.59 in | 0.3 in | 10 |
| April | 67.3°F | 45.5°F | 56.4°F | 4.59 in | — | 10 |
| May | 76.7°F | 56.4°F | 66.5°F | 5.22 in | — | 12 |
| June | 85.1°F | 65.3°F | 75.2°F | 4.28 in | — | 9 |
| July | 88.8°F | 69.2°F | 79.0°F | 3.85 in | — | 8 |
| August | 87.5°F | 67.1°F | 77.3°F | 3.54 in | — | 7 |
| September | 80.9°F | 58.4°F | 69.6°F | 3.31 in | — | 6 |
| October | 69.5°F | 46.4°F | 58.0°F | 3.20 in | — | 8 |
| November | 56.0°F | 35.7°F | 45.9°F | 3.47 in | 0.4 in | 8 |
| December | 44.7°F | 26.7°F | 35.7°F | 2.54 in | 2.1 in | 8 |
Climate twins of Chesterfield
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).