As of 11:20 PDT

Bryn Mawr, WA weather in December

70°

Bryn Mawr, Sunday, 9 August, 11:20

Mostly clear. Feels like 70°. High 78°, low 56°.

Pressure30.06 inHg

Wind4 mph W

Humidity69%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

In December, Bryn Mawr, WA averages a high of 43.9° and a low of 34.9°. About 7.6 inches of precipitation fall over the month (19 wet days). The record high is 59° (1980) and the record low 0.7° (1968). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	45.3°	36.5°	62%	55.6° (2021)	7.2° (1985)
2	45.3°	36.5°	68%	54.1° (2021)	21.9° (1985)
3	45.5°	36°	57%	57.6° (1965)	26.4° (1984)
4	44.8°	34.9°	55%	54.5° (1989)	9.9° (1970)
5	43.9°	34.9°	47%	57.4° (2023)	23.9° (1994)
6	44.6°	35.1°	52%	54.1° (2019)	23.4° (1972)
7	44.1°	35.2°	55%	53.1° (2025)	15.6° (1972)
8	44.2°	35.2°	55%	55.9° (2015)	12.2° (1972)
9	44.2°	35.4°	65%	55.2° (2014)	20.8° (1972)
10	44.8°	36.3°	73%	57.7° (2014)	15.3° (1972)
11	44.8°	36°	67%	55.6° (2025)	22.1° (1971)
12	44.4°	35.2°	65%	55° (1995)	20.3° (1972)
13	44.2°	35.4°	70%	56.7° (2025)	11.3° (1972)
14	44.6°	36.1°	75%	53.4° (2025)	24.1° (1967)
15	44.4°	36.1°	58%	58.8° (1980)	21.2° (1964)
16	45°	35.8°	57%	55.9° (1974)	7.7° (1964)
17	44.4°	35.1°	58%	53.6° (1994)	7° (1964)
18	44.1°	35.1°	57%	56.7° (2004)	14.2° (1964)
19	43.3°	34.7°	67%	56.1° (2024)	11.7° (2008)
20	43°	34.5°	68%	56.8° (2024)	6.4° (1990)
21	43.3°	34°	58%	56.1° (2020)	1.9° (1990)
22	43°	33.8°	58%	53.2° (2005)	8.2° (1990)
23	43.2°	33.6°	57%	54° (1963)	5.5° (1990)
24	43.5°	34.3°	58%	57.2° (1963)	12.4° (1983)
25	43.5°	34.5°	63%	55.6° (1980)	14.5° (1964)
26	43.5°	34.5°	57%	59° (1980)	20.5° (2017)
27	43.2°	34.2°	68%	57.9° (1980)	17.4° (2021)
28	42.4°	33.4°	53%	54.3° (2023)	9.5° (1968)
29	42.3°	33.1°	50%	57.6° (2023)	5° (1968)
30	42.8°	33.3°	53%	54.3° (2023)	0.7° (1968)
31	42.1°	32.5°	48%	54° (1980)	11.5° (1978)