Click on a day for an hourly weather forecast
The temperatures in New Hampshire in August are comfortable with low of 15°C and and high up to 29°C.
You can expect up to 3 rainy days in New Hampshire during the month of August.
Our weather forecast can give you a great sense of what weather to expect in New Hampshire in August 2025.
If you’re planning to visit New Hampshire in the near future, we highly recommend that you review the 14 day weather forecast for New Hampshire before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 6° | 5 | 26 | 0 | 92 mm | Good | New Hampshire in January |
| February | 16° / 6° | 4 | 24 | 0 | 90 mm | Good | New Hampshire in February |
| March | 17° / 7° | 6 | 26 | 0 | 89 mm | Good | New Hampshire in March |
| April | 20° / 8° | 2 | 28 | 0 | 36 mm | Good | New Hampshire in April |
| May | 23° / 10° | 1 | 30 | 0 | 16 mm | Perfect | New Hampshire in May |
| June | 27° / 13° | 0 | 30 | 0 | 6 mm | Perfect | New Hampshire in June |
| July | 29° / 14° | 0 | 31 | 0 | 2 mm | Good | New Hampshire in July |
| August | 29° / 15° | 0 | 31 | 0 | 1 mm | Good | New Hampshire in August |
| September | 29° / 15° | 0 | 30 | 0 | 4 mm | Good | New Hampshire in September |
| October | 24° / 13° | 2 | 29 | 0 | 35 mm | Perfect | New Hampshire in October |
| November | 18° / 9° | 3 | 27 | 0 | 55 mm | Good | New Hampshire in November |
| December | 14° / 7° | 5 | 26 | 0 | 79 mm | Good | New Hampshire in December |
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