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The temperatures in Hartford 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 Hartford 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 Hartford in September 2025.
If you’re planning to visit Hartford in the near future, we highly recommend that you review the 14 day weather forecast for Hartford before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -6° | 6 | 15 | 10 | 119 mm | Awful | Hartford in January |
| February | 2° / -6° | 7 | 10 | 11 | 132 mm | Awful | Hartford in February |
| March | 7° / -1° | 8 | 15 | 8 | 138 mm | Awful | Hartford in March |
| April | 14° / 4° | 8 | 21 | 1 | 141 mm | Ok | Hartford in April |
| May | 21° / 10° | 8 | 23 | 0 | 130 mm | Ok | Hartford in May |
| June | 26° / 14° | 8 | 22 | 0 | 146 mm | Good | Hartford in June |
| July | 29° / 18° | 8 | 23 | 0 | 157 mm | Ok | Hartford in July |
| August | 28° / 17° | 6 | 25 | 0 | 144 mm | Perfect | Hartford in August |
| September | 24° / 13° | 4 | 26 | 0 | 102 mm | Perfect | Hartford in September |
| October | 17° / 8° | 7 | 24 | 0 | 157 mm | Ok | Hartford in October |
| November | 10° / 2° | 7 | 22 | 2 | 117 mm | Awful | Hartford in November |
| December | 4° / -2° | 8 | 16 | 7 | 154 mm | Awful | Hartford in December |