Climate averages 1991–2020
Newton weather
in December.
A cold, wet month: the 10th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Newton: daytime highs average 4.6°C and nights cool to about -2.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 107 mm of rain on roughly 11 days, which makes December a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 09 min on an average December day.
The nearest other city in this atlas is Dorchester (12 km away). In December its highs average 4.6°C, about as warm as Newton, with 115 mm of rain.
Among the 498 cities listed in the United States, Newton ranks joint 372nd of 498 for the warmest December highs and joint 418th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Newton is 6.0°C cooler than that mean.
From December to January, average highs fall by 2.9°C to 1.7°C, and monthly precipitation falls from 107 mm to 87 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
Newton climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.7°C-6.6°C | -6.6°C | 87 | 9.6 | 9.59 h |
| February | 3.1°C-5.8°C | -5.8°C | 78 | 8.7 | 10.511 h |
| March | 7.0°C-2.0°C | -2.0°C | 109 | 10.9 | 11.912 h |
| April | 13.4°C3.9°C | 3.9°C | 93 | 10.8 | 13.313 h |
| May | 19.1°C9.6°C | 9.6°C | 77 | 10.3 | 14.615 h |
| June | 24.3°C15.1°C | 15.1°C | 88 | 10.7 | 15.215 h |
| July | 27.7°C18.7°C | 18.7°C | 77 | 10.4 | 14.915 h |
| August | 26.8°C18.1°C | 18.1°C | 88 | 9.6 | 13.914 h |
| September | 22.6°C14.4°C | 14.4°C | 85 | 8.1 | 12.513 h |
| October | 16.1°C8.4°C | 8.4°C | 99 | 9.3 | 11.111 h |
| November | 10.0°C2.7°C | 2.7°C | 87 | 9.1 | 9.810 h |
| December, selected | 4.6°C-2.6°C | -2.6°C | 107 | 10.6 | 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
- Dorchester in DecemberUnited States · 12 kmHigh 4.6°C · Low -2.4°C · 115 mm rain
- Boston in DecemberUnited States · 13 kmHigh 4.4°C · Low -3.1°C · 115 mm rain
- Quincy in DecemberUnited States · 19 kmHigh 4.9°C · Low -1.6°C · 115 mm rain
- Lynn in DecemberUnited States · 26 kmHigh 4.6°C · Low -1.5°C · 116 mm rain
- Brockton in DecemberUnited States · 32 kmHigh 5.1°C · Low -1.6°C · 110 mm rain
- Lowell in DecemberUnited States · 34 kmHigh 4.0°C · Low -3.4°C · 104 mm rain
- Lawrence (Massachusetts), United States in DecemberUnited States · 41 kmHigh 3.9°C · Low -3.4°C · 104 mm rain
- Worcester, United States in DecemberUnited States · 49 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 Newton) is explained once on the Newton year overview and on the Sources, method and limits page.