Climate averages 1991–2020
Nashua weather
in December.
A cold, wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Nashua: daytime highs average 3.3°C and nights cool to about -4.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 105 mm of rain on roughly 10 days, which makes December a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 9 h 06 min on an average December day.
The nearest other city in this atlas is Lowell (19 km away). In December its highs average 4.0°C, 0.7°C warmer than Nashua, with 104 mm of rain.
Among the 498 cities listed in the United States, Nashua ranks joint 411th of 498 for the warmest December highs and joint 408th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Nashua is 7.2°C cooler than that mean.
From December to January, average highs fall by 2.9°C to 0.4°C, and monthly precipitation falls from 105 mm to 80 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Lowell in DecemberUnited States · 19 kmHigh 4.0°C · Low -3.4°C · 104 mm rain
- Manchester, United States in DecemberUnited States · 26 kmHigh 2.8°C · Low -4.8°C · 104 mm rain
- Lawrence (Massachusetts), United States in DecemberUnited States · 26 kmHigh 3.9°C · Low -3.4°C · 104 mm rain
- Newton in DecemberUnited States · 52 kmHigh 4.6°C · Low -2.6°C · 107 mm rain
- Lynn in DecemberUnited States · 54 kmHigh 4.6°C · Low -1.5°C · 116 mm rain
- Boston in DecemberUnited States · 56 kmHigh 4.4°C · Low -3.1°C · 115 mm rain
- Dorchester in DecemberUnited States · 61 kmHigh 4.6°C · Low -2.4°C · 115 mm rain
- Worcester, United States in DecemberUnited States · 62 kmHigh 3.5°C · Low -3.6°C · 108 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.