As of 01:20 MDT

Chester, MT weather in September

59°

Chester, Wednesday, 7 October, 01:20

Overcast. Feels like 56°. High 65°, low 44°.

Pressure30.06 inHg

Wind6 mph W

Humidity38%

Visibility6.2 mi

Dew point33°

See detailed hourly forecast

In September, Chester, MT averages a high of 69.6° and a low of 48.2°. About 1.2 inches of precipitation fall over the month (5 wet days). The record high is 98.2° (2022) and the record low 22.3° (1985). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	76.3°	54.3°	13%	97.2° (1967)	42.3° (1974)
2	76.8°	54.1°	12%	94.8° (1969)	39° (2008)
3	76.6°	53.6°	12%	97.5° (2022)	33.3° (1962)
4	75.2°	53.6°	18%	93.9° (2003)	37.4° (1965)
5	75.4°	52.7°	25%	96.3° (1967)	38.1° (2025)
6	74.5°	52°	22%	93.9° (1988)	36.3° (1992)
7	73.2°	51.8°	18%	98.2° (2022)	35.1° (1985)
8	73.4°	51.4°	22%	91.8° (1981)	33.6° (2020)
9	72°	50.5°	18%	91.4° (1981)	34.2° (1962)
10	71.2°	50.4°	17%	87.3° (1966)	34° (1989)
11	70.9°	49.5°	15%	89.1° (2017)	30.9° (1989)
12	68.9°	48.7°	18%	87.4° (1969)	29.8° (1970)
13	67.6°	47.5°	15%	83.8° (1987)	28.8° (1970)
14	68.9°	46.8°	8%	86.9° (2012)	27.7° (1970)
15	70°	48°	15%	90.5° (2000)	27.9° (1965)
16	68.7°	48.6°	17%	90.3° (2009)	23.7° (1965)
17	67.8°	47.1°	17%	90° (2009)	27° (1965)
18	67.6°	46.8°	32%	90.9° (1981)	24.4° (1965)
19	65.5°	46.8°	23%	91° (2009)	31.1° (1965)
20	63.9°	45°	27%	83.5° (2025)	29.5° (1983)
21	64.4°	43.3°	25%	90.3° (1967)	26.8° (1995)
22	65.8°	44.4°	10%	84° (1987)	27.1° (2000)
23	67.5°	45°	17%	87.6° (2011)	24.8° (2000)
24	67.6°	45.5°	10%	90° (2009)	25.9° (1984)
25	69.1°	45.5°	13%	91.6° (2011)	24.3° (1972)
26	66.7°	46.9°	12%	84.4° (1963)	28.2° (1965)
27	66.2°	44.4°	10%	84.6° (1967)	27.3° (1965)
28	65.5°	44.1°	10%	89.1° (2022)	23.4° (1985)
29	66.9°	44.6°	10%	90.5° (1967)	22.3° (1985)
30	64.4°	44.6°	13%	87.6° (2011)	23.5° (1985)