Ottumwa Climate: Weather by Month and Best Time to Visit
Best months for Ottumwa: September, August, July, October.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 0°C | -8°C | 36 mm | 7 | – | – | 4.2 |
| February | 3°C | -6°C | 47 mm | 7 | – | – | 4.6 |
| March | 10°C | 0°C | 70 mm | 9 | – | – | 5.8 |
| April | 18°C | 6°C | 108 mm | 11 | – | – | 6.7 |
| May | 23°C | 12°C | 122 mm | 13 | – | – | 7.1 |
| June | 28°C | 18°C | 127 mm | 12 | – | – | 7.3 |
| July | 30°C | 20°C | 85 mm | 10 | – | – | 7.5 |
| August | 29°C | 18°C | 88 mm | 10 | – | – | 7.8 |
| September | 25°C | 14°C | 91 mm | 8 | – | – | 8.0 |
| October | 18°C | 7°C | 70 mm | 8 | – | – | 7.4 |
| November | 10°C | 1°C | 57 mm | 7 | – | – | 6.1 |
| December | 3°C | -5°C | 45 mm | 6 | – | – | 4.7 |