Walla Walla Climate: Weather by Month and Best Time to Visit
Best months for Walla Walla: August, September, July, June.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 4°C | -2°C | 83 mm | 14 | – | – | 4.1 |
| February | 7°C | -1°C | 67 mm | 12 | – | – | 4.9 |
| March | 11°C | 1°C | 74 mm | 13 | – | – | 5.5 |
| April | 15°C | 4°C | 57 mm | 11 | – | – | 6.5 |
| May | 20°C | 7°C | 54 mm | 9 | – | – | 7.6 |
| June | 24°C | 10°C | 33 mm | 6 | – | – | 8.2 |
| July | 30°C | 14°C | 8 mm | 2 | – | – | 8.5 |
| August | 30°C | 13°C | 11 mm | 2 | – | – | 8.6 |
| September | 24°C | 10°C | 20 mm | 4 | – | – | 8.6 |
| October | 16°C | 5°C | 53 mm | 9 | – | – | 7.0 |
| November | 8°C | 1°C | 85 mm | 14 | – | – | 4.9 |
| December | 4°C | -2°C | 92 mm | 14 | – | – | 3.8 |