Climate averages 1991–2020
Nashua weather
in August.
A warm, moderately wet month: the 2nd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Nashua: daytime highs average 26.9°C and nights cool to about 17.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 85 mm of rain on roughly 10 days, which makes August a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 55 min on an average August day.
The nearest other city in this atlas is Lowell (19 km away). In August its highs average 26.9°C, about as warm as Nashua, with 84 mm of rain.
Among the 498 cities listed in the United States, Nashua ranks joint 384th of 498 for the warmest August highs and joint 291st of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Nashua is 3.0°C cooler than that mean.
From August to September, average highs fall by 4.4°C to 22.5°C, and monthly rainfall rises from 85 mm to 86 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nashua climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.4°C-8.4°C | -8.4°C | 80 | 9.6 | 9.49 h |
| February | 2.0°C-7.5°C | -7.5°C | 76 | 8.5 | 10.511 h |
| March | 6.4°C-3.2°C | -3.2°C | 103 | 10.9 | 11.912 h |
| April | 13.3°C3.0°C | 3.0°C | 94 | 10.5 | 13.413 h |
| May | 19.3°C9.1°C | 9.1°C | 81 | 10.8 | 14.615 h |
| June | 24.6°C14.7°C | 14.7°C | 90 | 10.8 | 15.315 h |
| July | 27.9°C18.0°C | 18.0°C | 86 | 10.3 | 15.015 h |
| August, selected | 26.9°C17.3°C | 17.3°C | 85 | 9.6 | 13.914 h |
| September | 22.5°C13.4°C | 13.4°C | 86 | 8.0 | 12.513 h |
| October | 15.5°C7.2°C | 7.2°C | 97 | 9.3 | 11.111 h |
| November | 9.0°C1.5°C | 1.5°C | 86 | 9.4 | 9.810 h |
| December | 3.3°C-4.2°C | -4.2°C | 105 | 10.3 | 9.19 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Lowell in AugustUnited States · 19 kmHigh 26.9°C · Low 17.6°C · 84 mm rain
- Manchester, United States in AugustUnited States · 26 kmHigh 26.7°C · Low 16.9°C · 87 mm rain
- Lawrence (Massachusetts), United States in AugustUnited States · 26 kmHigh 26.9°C · Low 17.8°C · 84 mm rain
- Newton in AugustUnited States · 52 kmHigh 26.8°C · Low 18.1°C · 88 mm rain
- Lynn in AugustUnited States · 54 kmHigh 24.6°C · Low 18.3°C · 85 mm rain
- Boston in AugustUnited States · 56 kmHigh 26.6°C · Low 17.9°C · 85 mm rain
- Dorchester in AugustUnited States · 61 kmHigh 26.3°C · Low 18.1°C · 85 mm rain
- Worcester, United States in AugustUnited States · 62 kmHigh 26.5°C · Low 17.4°C · 97 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nashua) is explained once on the Nashua year overview and on the Sources, method and limits page.