Click on a day for an hourly weather forecast
The temperatures in Sterling in September are comfortable with low of 13°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Sterling during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Sterling in September 2025.
If you’re planning to visit Sterling in the near future, we highly recommend that you review the 14 day weather forecast for Sterling before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -10° | 4 | 13 | 14 | 42 mm | Awful | Sterling in January |
| February | -1° / -8° | 4 | 12 | 13 | 47 mm | Awful | Sterling in February |
| March | 8° / 0° | 7 | 18 | 6 | 75 mm | Awful | Sterling in March |
| April | 14° / 5° | 7 | 20 | 2 | 111 mm | Bad | Sterling in April |
| May | 21° / 11° | 10 | 21 | 0 | 162 mm | Ok | Sterling in May |
| June | 26° / 16° | 8 | 22 | 0 | 142 mm | Good | Sterling in June |
| July | 27° / 18° | 6 | 25 | 0 | 110 mm | Perfect | Sterling in July |
| August | 27° / 17° | 5 | 26 | 0 | 90 mm | Perfect | Sterling in August |
| September | 24° / 13° | 4 | 26 | 0 | 65 mm | Perfect | Sterling in September |
| October | 16° / 7° | 5 | 26 | 1 | 79 mm | Good | Sterling in October |
| November | 8° / 1° | 5 | 22 | 4 | 58 mm | Bad | Sterling in November |
| December | 1° / -4° | 4 | 17 | 10 | 50 mm | Awful | Sterling in December |