Aarau in May
5.8out of 10
Possible, with caveats
Mild: highs around 18°C. Very wet: about 17 rainy days.
18°CAvg high
9°CAvg low
17Rainy days (148 mm)
14:54 hDaylight
05:57Sunrise · 20:51 Sunset
Why this score
- Mild: highs around 18°C
- Very wet: about 17 rainy days
- Rain varies a lot between years (±4.5 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.5 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 | -2°C | 97 mm | 13 | – | – | 3.9 |
| February | 5°C | -2°C | 81 mm | 11 | – | – | 4.6 |
| March | 10°C | 1°C | 97 mm | 14 | – | – | 5.0 |
| April | 14°C | 4°C | 100 mm | 15 | – | – | 5.7 |
| May | 18°C | 9°C | 148 mm | 17 | – | – | 5.8 |
| June | 21°C | 12°C | 142 mm | 17 | – | – | 6.4 |
| July | 23°C | 14°C | 152 mm | 17 | – | – | 6.5 |
| August | 23°C | 13°C | 145 mm | 16 | – | – | 6.6 |
| September | 18°C | 10°C | 108 mm | 13 | – | – | 6.6 |
| October | 13°C | 6°C | 102 mm | 13 | – | – | 5.8 |
| November | 7°C | 2°C | 100 mm | 13 | – | – | 4.8 |
| December | 4°C | -1°C | 116 mm | 14 | – | – | 3.9 |
Frequently asked questions
How hot is Aarau in May?
Daytime highs average 18°C and nights about 9°C.
When is the best time to visit Aarau?
The best months are August, September, July, June.