Climate averages 1991–2020
Brockton 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 Brockton: daytime highs average 5.1°C and nights cool to about -1.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 110 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 10 min on an average December day.
The nearest other city in this atlas is Quincy (19 km away). In December its highs average 4.9°C, about as warm as Brockton, with 115 mm of rain.
Among the 498 cities listed in the United States, Brockton ranks joint 360th of 498 for the warmest December highs and joint 430th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Brockton is 5.4°C cooler than that mean.
From December to January, average highs fall by 2.9°C to 2.2°C, and monthly rainfall falls from 110 mm to 92 mm.
The annual picture
December in context
Monthly rainfall
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
Brockton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.2°C-5.4°C | -5.4°C | 92 | 9.7 | 9.59 h |
| February | 3.4°C-4.7°C | -4.7°C | 81 | 9.1 | 10.511 h |
| March | 6.9°C-1.2°C | -1.2°C | 112 | 11.1 | 11.912 h |
| April | 12.9°C4.2°C | 4.2°C | 95 | 11.2 | 13.313 h |
| May | 18.4°C9.7°C | 9.7°C | 77 | 10.6 | 14.515 h |
| June | 23.6°C15.1°C | 15.1°C | 86 | 9.7 | 15.215 h |
| July | 27.1°C18.7°C | 18.7°C | 77 | 9.9 | 14.915 h |
| August | 26.2°C18.2°C | 18.2°C | 89 | 9.6 | 13.914 h |
| September | 22.1°C14.7°C | 14.7°C | 89 | 8.1 | 12.513 h |
| October | 16.0°C8.9°C | 8.9°C | 104 | 9.4 | 11.111 h |
| November | 10.2°C3.4°C | 3.4°C | 91 | 8.9 | 9.910 h |
| December, selected | 5.1°C-1.6°C | -1.6°C | 110 | 10.6 | 9.29 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
- Quincy in DecemberUnited States · 19 kmHigh 4.9°C · Low -1.6°C · 115 mm rain
- Dorchester in DecemberUnited States · 24 kmHigh 4.6°C · Low -2.4°C · 115 mm rain
- Boston in DecemberUnited States · 31 kmHigh 4.4°C · Low -3.1°C · 115 mm rain
- Newton in DecemberUnited States · 32 kmHigh 4.6°C · Low -2.6°C · 107 mm rain
- Pawtucket in DecemberUnited States · 38 kmHigh 5.4°C · Low -2.0°C · 107 mm rain
- Lynn in DecemberUnited States · 43 kmHigh 4.6°C · Low -1.5°C · 116 mm rain
- Providence in DecemberUnited States · 44 kmHigh 5.5°C · Low -1.9°C · 109 mm rain
- Fall River in DecemberUnited States · 44 kmHigh 5.6°C · Low -0.9°C · 110 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 Brockton) is explained once on the Brockton year overview and on the Sources, method and limits page.