The climate in Watford City during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Watford City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 6°C (42°F) is normal.
| Daytime temperature | 21.3°C 70.3°F |
|---|---|
| Nightly temperature | 5.6°C 42°F |
| Average temperature | 13.4°C 56.1°F |
| Daily sunshine | 8.9 hrs |
| Avg rainfall | 37 mm 1.5 ins |
| Rainy days | 7 days |
| Sea temperature | 14°C 57.2°F |
| Humidity | 61% |
| Windspeed | 17.3kph 11 mph |
On average September is the 5th wettest month of the year in Watford City with around 37mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.9 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Watford City in September 2025.
Best places to visit in September
| Hottest month: | July | 28.7°C 83.7°F |
|---|---|---|
| Driest month: | February | 10mm 0.4ins |
| Sunniest month: | July | 12.6hrs |
| Coldest month: | January | -6.7°C 19.9°F |
| Wettest month: | June | 80mm 3.1ins |