As of 08:11 EDT

Chatham, MA weather in September

48°

Chatham, Wednesday, 7 October, 08:11

Clear. Feels like 48°. High 63°, low 40°.

Pressure30.06 inHg

Wind0 mph N

Humidity87%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

In September, Chatham, MA averages a high of 66.5° and a low of 60.9°. About 3.6 inches of precipitation fall over the month (8 wet days). The record high is 86° (2023) and the record low 45.5° (2000). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	69.4°	63.9°	18%	81.7° (2022)	56.3° (1986)
2	68.5°	63°	30%	75.2° (2010)	56.1° (1985)
3	68.7°	63.1°	30%	79.3° (2018)	55.4° (1967)
4	69.4°	63.1°	27%	81.3° (2020)	56.7° (1997)
5	68.7°	63.1°	13%	77° (2018)	54.3° (1990)
6	68.5°	63.3°	23%	82.2° (2018)	55.6° (1994)
7	68.7°	63.1°	30%	86° (2023)	53.4° (2000)
8	68°	62.8°	17%	78.4° (2023)	53.1° (1984)
9	68°	62.6°	20%	80.2° (2023)	52.2° (1982)
10	67.8°	62.6°	28%	75.9° (1983)	53.6° (1979)
11	67.8°	62.1°	23%	79.2° (2022)	53.6° (1967)
12	67.3°	61.9°	18%	75.7° (2005)	55° (1967)
13	67.3°	61.9°	32%	74.8° (2023)	52° (1963)
14	67.6°	61.9°	28%	76.3° (2017)	52.2° (1963)
15	66.9°	61.2°	32%	76.3° (2021)	52.2° (2014)
16	65.8°	59.9°	27%	73.8° (2018)	51.4° (1986)
17	65.8°	60.1°	22%	74.1° (2018)	50.4° (1966)
18	65.7°	60.1°	30%	75.7° (2022)	50.5° (1986)
19	65.3°	59.7°	33%	71.8° (2012)	51.1° (1984)
20	65.1°	59.7°	22%	71.8° (1983)	49.6° (1979)
21	65.3°	59.9°	23%	73.6° (2019)	49.8° (1962)
22	65.8°	60.1°	37%	75° (2022)	47.7° (1962)
23	65.5°	59.4°	42%	73.8° (1980)	48.9° (1963)
24	63.7°	58.3°	27%	74.5° (2019)	46.9° (1963)
25	64°	58.1°	18%	74.8° (2020)	48.7° (1963)
26	64.8°	59.4°	33%	75.4° (2025)	51.3° (1978)
27	65.3°	59°	30%	72.3° (1985)	48.9° (1989)
28	64.9°	59.2°	37%	73.9° (2021)	48.7° (1965)
29	63.5°	58.3°	38%	70.9° (2020)	48.4° (1981)
30	62.4°	56.8°	27%	73.8° (2020)	45.5° (2000)