As of 09:21 EDT

Belmont, MA weather in December

81°

Belmont, Sunday, 9 August, 09:21

Clear. Feels like 85°. High 92°, low 69°.

Pressure29.91 inHg

Wind6 mph SE

Humidity73%

Visibility6.2 mi

Dew point71°

See detailed hourly forecast

In December, Belmont, MA averages a high of 39.2° and a low of 25.7°. About 4.1 inches of precipitation fall over the month (10 wet days). The record high is 68.2° (2001) and the record low -11.6° (1980). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	44.1°	31.8°	32%	66.7° (2001)	14.2° (1989)
2	44.1°	30.7°	27%	64.2° (2006)	11.7° (1989)
3	43.5°	30.2°	32%	64.6° (2009)	9.5° (1976)
4	42.1°	28.9°	22%	65.5° (1982)	9.7° (1989)
5	40.6°	28.2°	28%	63.7° (2001)	4.6° (2025)
6	42.4°	29.3°	45%	68.2° (2001)	12.7° (2007)
7	41.5°	28.2°	33%	68° (1998)	9° (1964)
8	38.3°	26.2°	25%	56.7° (2022)	-3.6° (1964)
9	40.1°	25.5°	35%	59.2° (1991)	6.1° (1968)
10	40.8°	27.5°	38%	61° (2023)	3.7° (1968)
11	40.6°	27.1°	40%	60.6° (2021)	2.1° (1977)
12	39.6°	26.2°	37%	61.5° (2021)	0.3° (1977)
13	40.1°	26.2°	25%	59.9° (2020)	5° (1982)
14	39°	26.4°	40%	56.7° (2019)	0.9° (2005)
15	39.2°	26.4°	33%	59.5° (1975)	2.3° (2005)
16	39.2°	26.2°	37%	58.6° (2021)	3.9° (2016)
17	39°	25.9°	43%	59.4° (2021)	-4° (2013)
18	37.6°	23.9°	32%	59.9° (2023)	-0.4° (1980)
19	36.1°	22.5°	23%	57.9° (2025)	2.8° (1973)
20	36°	23.2°	35%	55° (2002)	-3.5° (1980)
21	37.9°	24.1°	28%	61.2° (2018)	-4.7° (1963)
22	38.5°	24.6°	35%	61.5° (2013)	-2.4° (1989)
23	38.7°	25°	38%	60.4° (1990)	-5.3° (1989)
24	39°	24.6°	35%	67.5° (2015)	-2.7° (1975)
25	37.8°	22.3°	33%	61.9° (2015)	-9.9° (1980)
26	35.8°	22.5°	23%	58.1° (1964)	-11.6° (1980)
27	34.7°	22.1°	25%	55° (1964)	-0.9° (1968)
28	37.6°	22.6°	32%	58.5° (2008)	-4.7° (1960)
29	38.1°	24.1°	32%	64° (1984)	-9.2° (2017)
30	36°	21.9°	38%	58.8° (2022)	-8° (1962)
31	36.5°	21.4°	37%	59.2° (1965)	-8.9° (1962)