Mattoon in September
8.1out of 10
Yes, a good time to go
Warm and comfortable: highs around 26°C. Some rain: about 7 rainy days.
26°CAvg high
15°CAvg low
7Rainy days (75 mm)
12:15 hDaylight
06:41Sunrise · 18:55 Sunset
Why this score
- Warm and comfortable: highs around 26°C
- Some rain: about 7 rainy days
What to wear and pack
- T-shirts and light layers
How reliable is the forecast?
Rain in September varies a lot between years (±3.1 rainy days), so check the forecast closer to your trip. 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 | 3°C | -5°C | 75 mm | 9 | – | – | 4.4 |
| February | 6°C | -3°C | 64 mm | 8 | – | – | 5.0 |
| March | 12°C | 2°C | 87 mm | 11 | – | – | 5.9 |
| April | 19°C | 8°C | 120 mm | 12 | – | – | 6.8 |
| May | 24°C | 14°C | 118 mm | 13 | – | – | 7.1 |
| June | 28°C | 19°C | 109 mm | 11 | – | – | 7.4 |
| July | 30°C | 20°C | 95 mm | 11 | – | – | 7.4 |
| August | 29°C | 19°C | 76 mm | 9 | – | – | 7.9 |
| September | 26°C | 15°C | 75 mm | 7 | – | – | 8.1 |
| October | 19°C | 9°C | 83 mm | 8 | – | – | 7.6 |
| November | 12°C | 2°C | 88 mm | 8 | – | – | 6.2 |
| December | 5°C | -2°C | 68 mm | 9 | – | – | 4.9 |
Frequently asked questions
How hot is Mattoon in September?
Daytime highs average 26°C and nights about 15°C.
When is the best time to visit Mattoon?
The best months are September, August, October.