Best time to visit Grass Range, MT

A month-by-month travel weather guide based on NOAA 30-year climate normals.

The most comfortable travel window in Grass Range runs from May through September — 5 months of pleasant temperatures and modest rainfall.

January Cold
High
37.2°F
Low
14.2°F
Precip
0.68 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 8h 42m

February Cold
High
38.8°F
Low
15.7°F
Precip
0.51 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 10h 3m

March Cool
High
48.2°F
Low
23.0°F
Precip
0.87 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 11h 39m

April Cool
High
57.1°F
Low
30.7°F
Precip
1.85 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 13h 22m

May Good
High
66.0°F
Low
39.5°F
Precip
3.39 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 51m

June Good
High
74.0°F
Low
47.4°F
Precip
3.22 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 15h 38m

July Good
High
83.3°F
Low
52.9°F
Precip
1.70 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 15h 20m

August Good
High
82.7°F
Low
51.9°F
Precip
1.67 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 2m

September Good
High
72.6°F
Low
43.5°F
Precip
1.46 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 12h 19m

October Cool
High
58.9°F
Low
33.4°F
Precip
1.25 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 10h 36m

November Cool
High
46.3°F
Low
22.7°F
Precip
0.71 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 9h 5m

December Cold
High
37.7°F
Low
15.2°F
Precip
0.55 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 8h 19m

Looking for similar climates? See Grass Range's climate twins. Or jump straight to the full climate profile.