Click on a day for an hourly weather forecast
The temperatures in Nashua in August are comfortable with low of 17°C and and high up to 28°C.
You can expect rain for roughly half of the month of August in Nashua. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Nashua in August 2025.
If you’re planning to visit Nashua in the near future, we highly recommend that you review the 14 day weather forecast for Nashua before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -8° | 8 | 18 | 5 | 79 mm | Awful | Nashua in January |
| February | 2° / -7° | 8 | 14 | 6 | 86 mm | Awful | Nashua in February |
| March | 6° / -3° | 7 | 20 | 4 | 91 mm | Awful | Nashua in March |
| April | 13° / 3° | 7 | 22 | 1 | 91 mm | Bad | Nashua in April |
| May | 20° / 9° | 8 | 23 | 0 | 72 mm | Ok | Nashua in May |
| June | 25° / 14° | 8 | 22 | 0 | 96 mm | Good | Nashua in June |
| July | 28° / 17° | 10 | 21 | 0 | 106 mm | Good | Nashua in July |
| August | 28° / 17° | 8 | 23 | 0 | 88 mm | Good | Nashua in August |
| September | 23° / 13° | 6 | 24 | 0 | 78 mm | Perfect | Nashua in September |
| October | 16° / 7° | 7 | 23 | 0 | 115 mm | Ok | Nashua in October |
| November | 9° / 1° | 6 | 22 | 1 | 80 mm | Ok | Nashua in November |
| December | 3° / -3° | 8 | 18 | 5 | 112 mm | Awful | Nashua in December |