As of 12:00 EDT

Chester, PA weather in September

64°

Chester, Wednesday, 7 October, 12:00

Clear. Feels like 63°. High 66°, low 41°.

Pressure30.03 inHg

Wind9.2 mph SW

Humidity63%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

In September, Chester, PA averages a high of 76.6° and a low of 61.2°. About 3.7 inches of precipitation fall over the month (9 wet days). The record high is 97.2° (2023) and the record low 41.2° (1963). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	80.6°	65.3°	32%	92.8° (2010)	56.3° (1967)
2	80.6°	64.8°	30%	94.1° (1980)	53.4° (1970)
3	81°	64.9°	33%	93.4° (2023)	50° (1967)
4	81°	65.3°	25%	96.6° (2023)	52.3° (2024)
5	80.2°	64.9°	30%	97.2° (2023)	53.4° (1997)
6	79.5°	64.2°	32%	96.8° (2023)	52.7° (1994)
7	80.4°	63.7°	28%	92.3° (2023)	48.6° (1984)
8	79.5°	63.5°	30%	92.5° (2023)	51.8° (2024)
9	78.8°	63.3°	27%	90.7° (2016)	50.2° (1986)
10	78.6°	63.5°	30%	93° (1983)	50° (1975)
11	78.1°	62.6°	25%	94.8° (1983)	51.3° (1969)
12	77.9°	62.2°	25%	90.1° (1961)	49.1° (1967)
13	78.4°	62.1°	27%	90° (2005)	48.9° (1967)
14	78.1°	62.6°	28%	89.8° (2008)	48.6° (1985)
15	76.3°	61.3°	27%	89.2° (1970)	45.3° (1975)
16	75.9°	60.1°	28%	91.9° (1970)	47.7° (2001)
17	75.9°	60.6°	30%	90.7° (1991)	47.3° (1986)
18	76.1°	60.6°	38%	87.3° (1965)	45.9° (1990)
19	75.6°	59.4°	23%	89.6° (1983)	48.2° (1990)
20	75.4°	59.5°	17%	87.1° (1983)	47.1° (1979)
21	75.6°	59.9°	22%	87.3° (1965)	44.4° (1962)
22	75°	59.9°	30%	91.4° (1970)	44.8° (1962)
23	73.6°	59°	30%	93.4° (1970)	46.4° (1963)
24	72.9°	57.6°	27%	91.9° (1970)	41.2° (1963)
25	72.3°	57.7°	28%	90.5° (1970)	43.5° (1983)
26	73.6°	58.5°	43%	89.6° (1970)	47.1° (1963)
27	73.9°	58.6°	42%	89.6° (1998)	45.5° (2000)
28	72.9°	58.6°	47%	83.8° (2019)	41.9° (1989)
29	70.7°	57.4°	30%	83.3° (2019)	45.5° (2000)
30	69.4°	55.2°	30%	86.7° (1986)	42.3° (2000)