Weather WorldGrass Range School, MT 14 Day Weather
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Grass Range School, MT Weather Forecast
Grass Range School, MT Weather Forecast Dated: 436 PM Fri Sep 18 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Friday, September 18, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
76°F 24°C
Partly Cloudy
Early-Evening
69°F 21°C
Cloudy
Pleasant near 76°F 24°C, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds turning from the W to the NNE at 9 mph 14 km/h.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Light Showers
Mid-Afternoon
58°F 14°C
Light Showers
Early-Evening
55°F 13°C
Heavy Rain Showers
Mildly cool near 58°F 14°C, persistent showers off and on through the day, with increasing humidity and steady pressure. Winds switching from the N to the NNW at 9 mph 14 km/h.
Sunday, September 20, 2026
Mid-Morning
55°F 13°C
Light Showers
Mid-Afternoon
62°F 17°C
Scattered Showers
Early-Evening
61°F 16°C
Scattered Showers
Comfortable at 62°F 17°C, locally heavy downpours at times, with lower humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
58°F 14°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
66°F 19°C
Sunny
Mild temperatures up to 72°F 22°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds SSE at 11 mph 18 km/h.
Tuesday, September 22, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
71°F 22°C
Overcast
Very warm with a high of 80°F 27°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
73°F 23°C
Sunny
Warm and summery near 81°F 27°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the W to the S at 9 mph 15 km/h.
Thursday, September 24, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
75°F 24°C
Sunny
Balmy with temperatures reaching 83°F 28°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the S to the SSW at 10 mph 17 km/h.
Friday, September 25, 2026
Mid-Morning
66°F 19°C
Partly Cloudy
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
74°F 24°C
Overcast
Quite warm around 84°F 29°C, partly cloudy in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds turning from the S to the SSW at 10 mph 16 km/h.
Saturday, September 26, 2026
Mid-Morning
51°F 11°C
Overcast
Mid-Afternoon
53°F 11°C
Scattered Showers
Early-Evening
61°F 16°C
Sunny
Brisk around 53°F 11°C, locally heavy downpours at times, with lower humidity and barometric pressure falling. Winds picking up from NNE at 8 mph 13 km/h to W at 27 mph 43 km/h. Gusts up to 39 mph 62 km/h.
Sunday, September 27, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
65°F 18°C
Partly Cloudy
Early-Evening
57°F 14°C
Sunny
Mildly cool near 65°F 18°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds moving from the W to the WNW at 12 mph 20 km/h. Gusts up to 22 mph 36 km/h.
Monday, September 28, 2026
Mid-Morning
47°F 8°C
Scattered Showers
Mid-Afternoon
45°F 7°C
Scattered Showers
Early-Evening
43°F 6°C
Scattered Showers
Chilly near 45°F 7°C, scattered downpours possible, with increasing humidity and barometric pressure rising. Winds swinging from the W to the NW at 23 mph 36 km/h. Gusts up to 36 mph 59 km/h.
Tuesday, September 29, 2026
Mid-Morning
39°F 4°C
Light Snow Showers
Mid-Afternoon
44°F 7°C
Scattered Showers
Early-Evening
41°F 5°C
Overcast
Cold with a high near 44°F 7°C, blowing snow reducing visibility at times, with lower humidity and barometric pressure rising. Winds out of the NW at 22 mph 35 km/h. Gusts up to 24 mph 38 km/h.
Wednesday, September 30, 2026
Mid-Morning
39°F 4°C
Scattered Showers
Mid-Afternoon
46°F 8°C
Overcast
Early-Evening
44°F 7°C
Sunny
Brisk around 46°F 8°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling.
Thursday, October 1, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
56°F 13°C
Sunny
Mildly cool near 63°F 17°C, sunny throughout the day, with lower humidity and barometric pressure falling.
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