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Fallon, MT Weather Forecast
Fallon, MT Weather Forecast Dated: 702 AM Fri Sep 18 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Friday, September 18, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
70°F 21°C
Sunny
Pleasant near 77°F 25°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds turning from the SSE to the SE at 16 mph 25 km/h. Gusts up to 26 mph 41 km/h.
Saturday, September 19, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
62°F 17°C
Scattered Showers
Early-Evening
58°F 15°C
Light Showers
Mildly cool near 62°F 17°C, scattered downpours possible, with lower humidity and steady pressure. Winds blowing from the E at 11 mph 18 km/h. Gusts up to 20 mph 32 km/h.
Sunday, September 20, 2026
Mid-Morning
53°F 11°C
Scattered Showers
Mid-Afternoon
54°F 12°C
Light Showers
Early-Evening
53°F 12°C
Scattered Showers
Chilly near 54°F 12°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the ESE to the SE at 11 mph 16 km/h.
Monday, September 21, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
58°F 15°C
Sunny
Cool with a high near 66°F 19°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the SE at 18 mph 29 km/h. Gusts up to 23 mph 37 km/h.
Tuesday, September 22, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
78°F 26°C
Sunny
Early-Evening
79°F 26°C
Sunny
Mild with a high of 78°F 26°C, sunny throughout the day, with lower humidity and steady pressure. Winds shifting from the S to the SSE at 8 mph 12 km/h.
Wednesday, September 23, 2026
Mid-Morning
63°F 17°C
Scattered Showers
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
70°F 21°C
Sunny
Pleasant near 72°F 22°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds turning from the NNW to the NNE at 11 mph 18 km/h.
Thursday, September 24, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
72°F 23°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the ESE to the SSE at 18 mph 29 km/h. Gusts up to 31 mph 49 km/h.
Friday, September 25, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
70°F 21°C
Sunny
Enjoyable around 77°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds moving from the SSE to the SE at 18 mph 29 km/h. Gusts up to 26 mph 42 km/h.
Saturday, September 26, 2026
Mid-Morning
64°F 18°C
Partly Cloudy
Mid-Afternoon
84°F 29°C
Cloudy
Early-Evening
79°F 26°C
Cloudy
Warm temperatures up to 84°F 29°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds swinging from the SE to the WNW at 15 mph 24 km/h. Gusts up to 25 mph 39 km/h.
Sunday, September 27, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
65°F 19°C
Partly Cloudy
Mildly cool near 64°F 18°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds shifting from the WSW to the W at 7 mph 12 km/h.
Monday, September 28, 2026
Mid-Morning
49°F 9°C
Partly Cloudy
Mid-Afternoon
55°F 13°C
Sunny
Early-Evening
47°F 8°C
Overcast
Chilly near 55°F 13°C, partly cloudy through the afternoon, turning overcast this evening, with steady humidity and barometric pressure rising. Winds building from SW at 7 mph 11 km/h to W at 21 mph 33 km/h. Gusts up to 27 mph 43 km/h.
Tuesday, September 29, 2026
Mid-Morning
40°F 4°C
Overcast
Mid-Afternoon
38°F 3°C
Scattered Showers
Early-Evening
38°F 4°C
Overcast
Cold with a high near 38°F 3°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds switching from the WNW to the NW at 15 mph 25 km/h.
Wednesday, September 30, 2026
Mid-Morning
36°F 2°C
Scattered Showers
Mid-Afternoon
40°F 4°C
Scattered Showers
Early-Evening
40°F 5°C
Cloudy
Nippy around 40°F 4°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds out of the NW at 7 mph 12 km/h.
Thursday, October 1, 2026
Mid-Morning
39°F 4°C
Sunny
Mid-Afternoon
54°F 12°C
Sunny
Early-Evening
57°F 14°C
Sunny
Cool and brisk at 54°F 12°C, sunny throughout the day, with lower humidity and barometric pressure falling.
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