Walla Walla in May
7.6out of 10
Yes, a good time to go
Mild: highs around 20°C. Frequent rain: about 9 rainy days.
20°CAvg high
7°CAvg low
9Rainy days (54 mm)
14:45 hDaylight
05:27Sunrise · 20:12 Sunset
Why this score
- Mild: highs around 20°C
- Frequent rain: about 9 rainy days
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±3.7 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 | 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 |
Frequently asked questions
How hot is Walla Walla in May?
Daytime highs average 20°C and nights about 7°C.
When is the best time to visit Walla Walla?
The best months are August, September, July, June.