As of 23:00 PDT

Seattle, WA weather in September

63°

Seattle, Saturday, 8 August, 23:00

Clear. Feels like 63°. High 84°, low 58°.

Pressure30.06 inHg

Wind4.5 mph NE

Humidity74%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

In September, Seattle, WA averages a high of 68.5° and a low of 52.2°. About 2.8 inches of precipitation fall over the month (9 wet days). The record high is 92.3° (1988) and the record low 32.2° (1972). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	71.4°	54.7°	27%	88° (1987)	42.6° (1973)
2	72°	54.1°	30%	92.3° (1988)	44.2° (1960)
3	72°	54.3°	23%	91.8° (1988)	44.1° (1975)
4	71.6°	54.3°	20%	84.7° (1988)	45.3° (1965)
5	71.2°	54.3°	30%	89.6° (2017)	46.2° (2000)
6	70.9°	54°	27%	85.8° (2017)	43.3° (1960)
7	70.9°	53.8°	28%	87.8° (1981)	42.3° (1960)
8	70.5°	54.1°	28%	82.9° (1981)	44.4° (1976)
9	70.2°	53.2°	27%	86.5° (1963)	40.3° (1970)
10	70.3°	53.4°	28%	86.7° (2020)	43.7° (1964)
11	70°	52.5°	20%	83.5° (2011)	42.6° (1964)
12	69.4°	52.2°	20%	80.4° (1989)	43.2° (1967)
13	70°	51.6°	20%	81.9° (1988)	43.7° (1970)
14	69.8°	52.5°	25%	84.4° (1979)	41.2° (1971)
15	68.9°	52.5°	32%	85.1° (1981)	41.7° (1992)
16	68.2°	52.5°	38%	87.6° (2025)	42.1° (1965)
17	66.4°	52.5°	40%	79.7° (1991)	41.9° (1965)
18	66.4°	52.2°	40%	80.6° (1991)	42.4° (1965)
19	66.2°	51.6°	40%	81.3° (1999)	38.1° (1983)
20	66°	51.3°	42%	83.3° (1974)	39.4° (1983)
21	67.3°	50.2°	25%	84.4° (1974)	40.6° (1968)
22	67.5°	50.2°	30%	84.7° (1990)	41.9° (1961)
23	66.6°	51.1°	33%	80.2° (1989)	38.3° (2000)
24	66.6°	50.4°	30%	83.3° (1974)	36.9° (1970)
25	66.2°	51.1°	33%	82.9° (1991)	36.9° (1972)
26	65.8°	50.7°	35%	79.3° (1991)	39.7° (1972)
27	66°	50.2°	23%	83.3° (1967)	32.2° (1972)
28	65.8°	49.8°	28%	78.6° (2017)	39° (1983)
29	65.3°	50°	33%	78.1° (1992)	38.1° (1983)
30	64.4°	50°	32%	77.4° (1987)	37.6° (1971)