O'Fallon in April
7.1out of 10
Possible, with caveats
Mild: highs around 20°C. Frequent rain: about 11 rainy days.
20°CAvg high
9°CAvg low
11Rainy days (114 mm)
13:01 hDaylight
06:32Sunrise · 19:34 Sunset
Why this score
- Mild: highs around 20°C
- Frequent rain: about 11 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in April is fairly consistent from year to year (2.7 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 5°C | -4°C | 65 mm | 7 | – | – | 4.9 |
| February | 8°C | -2°C | 61 mm | 8 | – | – | 5.5 |
| March | 14°C | 3°C | 92 mm | 10 | – | – | 6.3 |
| April | 20°C | 9°C | 114 mm | 11 | – | – | 7.1 |
| May | 25°C | 14°C | 123 mm | 13 | – | – | 7.1 |
| June | 29°C | 19°C | 101 mm | 11 | – | – | 7.5 |
| July | 31°C | 21°C | 82 mm | 10 | – | – | 7.1 |
| August | 30°C | 20°C | 76 mm | 9 | – | – | 7.5 |
| September | 27°C | 15°C | 81 mm | 7 | – | – | 8.1 |
| October | 20°C | 9°C | 83 mm | 9 | – | – | 7.7 |
| November | 13°C | 3°C | 89 mm | 8 | – | – | 6.5 |
| December | 7°C | -1°C | 62 mm | 8 | – | – | 5.3 |
Frequently asked questions
How hot is O'Fallon in April?
Daytime highs average 20°C and nights about 9°C.
When is the best time to visit O'Fallon?
The best months are September, October, June, August.