Temperature
Cool by day, cold at night.
Cahokia is usually most comfortable in April, September, and October. Typical daytime highs range from 40–88°F across the year. Rain varies by season.

Cool by day, cold at night.
Several rainy days. About 9 wet days this month.
A mix of sunshine and cloud.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 46° and nights feel near 33°.
Partly cloudy skies this month.
Calm winds are typical in November.
November late afternoons are around 52°F, easing to about 47°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 40 | 26 | 2.9 | 8 | 6.1 | 70 |
| Feb | 46 | 29 | 2.5 | 8 | 7.0 | 67 |
| Mar | 57 | 38 | 3.7 | 11 | 8.0 | 64 |
| Apr | 69 | 49 | 4.7 | 12 | 9.0 | 61 |
| May | 77 | 59 | 5.1 | 13 | 10.4 | 66 |
| Jun | 86 | 68 | 4.2 | 11 | 11.8 | 67 |
| Jul | 88 | 71 | 3.3 | 10 | 12.2 | 70 |
| Aug | 87 | 69 | 3.0 | 9 | 11.6 | 70 |
| Sep | 81 | 61 | 3.3 | 8 | 10.0 | 68 |
| Oct | 69 | 50 | 3.4 | 9 | 8.2 | 67 |
| Nov | 55 | 39 | 3.7 | 9 | 6.7 | 68 |
| Dec | 44 | 30 | 2.7 | 9 | 5.8 | 72 |
Similar climates
Want a side-by-side climate view? Compare Cahokia with New York City.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology