Watertown in September
7.4out of 10
Possible, with caveats
Mild: highs around 21°C. Frequent rain: about 10 rainy days.
21°CAvg high
13°CAvg low
10Rainy days (97 mm)
12:17 hDaylight
06:49Sunrise · 19:07 Sunset
Why this score
- Mild: highs around 21°C
- Frequent rain: about 10 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?
Rainfall in September is fairly consistent from year to year (3.0 days). 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 | -2°C | -9°C | 86 mm | 14 | – | – | 3.2 |
| February | -1°C | -9°C | 71 mm | 11 | – | – | 3.6 |
| March | 3°C | -4°C | 82 mm | 12 | – | – | 4.1 |
| April | 11°C | 3°C | 103 mm | 12 | – | – | 5.5 |
| May | 17°C | 9°C | 86 mm | 12 | – | – | 6.7 |
| June | 22°C | 15°C | 102 mm | 12 | – | – | 7.3 |
| July | 25°C | 18°C | 106 mm | 13 | – | – | 7.2 |
| August | 24°C | 17°C | 96 mm | 12 | – | – | 7.4 |
| September | 21°C | 13°C | 97 mm | 10 | – | – | 7.4 |
| October | 14°C | 7°C | 116 mm | 13 | – | – | 5.8 |
| November | 8°C | 1°C | 98 mm | 14 | – | – | 4.7 |
| December | 2°C | -4°C | 96 mm | 15 | – | – | 3.3 |
Frequently asked questions
How hot is Watertown in September?
Daytime highs average 21°C and nights about 13°C.
When is the best time to visit Watertown?
The best months are August, September, June, July.