Chain of Rocks, MO
Climate overview — based on NOAA 1991-2020 normals from ST PETERS 2 SE, MO US.
Year-round temperatures (°F)
Climate summary
Chain of Rocks has an annual average temperature of 55.3°F with about 42.3 inches of precipitation per year and 14.8 inches of snow. The warmest month is July (average high 88.1°F), and the coldest is January (average low 21.2°F). May is typically the wettest month (4.80 in) and February the driest (2.37 in). Snow typically falls from November through March.
Best time to visit Chain of Rocks
Full guide →Climate change signal
All-time records →10 of 366 (2.7%) of Chain of Rocks'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.
| 1980s | 170 | |
| 1990s | 56 | |
| 2000s | 47 | |
| 2010s | 93 | |
| 2020s | 0 |
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 | 39.3°F | 21.2°F | 30.2°F | 2.44 in | 4.7 in | 8 |
| February | 44.9°F | 24.8°F | 34.8°F | 2.37 in | 5.0 in | 8 |
| March | 55.5°F | 33.3°F | 44.4°F | 3.46 in | 1.5 in | 11 |
| April | 67.3°F | 43.3°F | 55.3°F | 4.74 in | 0.1 in | 11 |
| May | 76.3°F | 53.5°F | 64.9°F | 4.80 in | — | 13 |
| June | 84.4°F | 63.3°F | 73.9°F | 4.26 in | — | 10 |
| July | 88.1°F | 67.5°F | 77.8°F | 4.23 in | — | 9 |
| August | 87.2°F | 65.4°F | 76.3°F | 3.76 in | — | 8 |
| September | 80.8°F | 57.1°F | 68.9°F | 3.07 in | — | 8 |
| October | 68.5°F | 45.2°F | 56.9°F | 3.11 in | — | 8 |
| November | 54.9°F | 35.0°F | 44.9°F | 3.54 in | 0.8 in | 9 |
| December | 43.6°F | 26.5°F | 35.0°F | 2.56 in | 2.7 in | 9 |
Climate twins of Chain of Rocks
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).