As of 11:36 MDT

Grass Range, MT weather in September

73°

Grass Range, Wednesday, 7 October, 11:36

Overcast. Feels like 71°. High 73°, low 46°.

Pressure30.09 inHg

Wind4 mph E

Humidity25%

Visibility6.2 mi

Dew point35°

See detailed hourly forecast

In September, Grass Range, MT averages a high of 71.3° and a low of 50.3°. About 1.7 inches of precipitation fall over the month (7 wet days). The record high is 103.1° (2022) and the record low 14.9° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	77.9°	55.4°	15%	95.4° (1983)	44.4° (2008)
2	78.8°	55.9°	17%	93° (2007)	39° (2008)
3	77.9°	55.4°	10%	98.6° (2022)	38.5° (1962)
4	77.2°	55.4°	17%	95.5° (2007)	37.9° (1962)
5	77°	54.5°	23%	94.3° (2022)	38.8° (1965)
6	75.9°	54.3°	28%	94.1° (1988)	36.5° (1965)
7	75°	53.2°	30%	103.1° (2022)	39.4° (1965)
8	75°	52.9°	23%	92.7° (1994)	32.7° (2020)
9	74.5°	53.1°	23%	91.8° (2017)	30.6° (1962)
10	73.6°	51.8°	25%	89.1° (1966)	35.1° (2014)
11	72.7°	51.3°	25%	89.1° (1966)	28.8° (1989)
12	70.3°	50.5°	28%	91° (1990)	28.6° (1970)
13	69.1°	49.3°	25%	87.1° (2006)	30.2° (1970)
14	70.7°	48.7°	17%	93.9° (2020)	21.6° (1970)
15	71.6°	50°	10%	91° (2000)	30.4° (1973)
16	70.7°	50°	22%	92.5° (2019)	22.6° (1973)
17	69.4°	49.5°	28%	90.9° (2009)	24.8° (1965)
18	69.8°	48.7°	32%	88.9° (1981)	23.4° (1965)
19	67.8°	48.4°	33%	92.1° (2009)	30.2° (1983)
20	65.7°	46.6°	32%	84.2° (2025)	26.6° (1983)
21	65.8°	45.5°	27%	85.5° (2025)	19.4° (1971)
22	67.3°	45.9°	18%	85.1° (2011)	27.1° (2000)
23	68.4°	47.3°	23%	90.9° (1966)	20.1° (2000)
24	68.7°	47.7°	15%	89.1° (2011)	24.3° (1984)
25	70.7°	48°	18%	92.1° (2015)	16.5° (1984)
26	68.2°	49.8°	20%	90.1° (2015)	29.1° (1965)
27	67.5°	46.9°	23%	86.7° (1963)	27.1° (1961)
28	67.6°	46.8°	12%	86.4° (2010)	14.9° (1984)
29	68.7°	47.5°	13%	91° (2024)	18.1° (1984)
30	66.9°	47.3°	18%	89.2° (1963)	24.1° (1985)