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Sun River, MT Weather Forecast for 5-Days

Updated: Wed May 20th 2026 4:45 AM MDT

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Sun River, MT Weather – 5-20 – Moderate Rain
54° / 41°
Moderate Rain
It will rain at times in Sun River, with a high of 54°F and a low of 41°F. The chance of rain is 89% with an estimated 0.23in. Wind will be moderate, blowing around 14mph on average and gusts of 17.2mph at 12 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 86% at 11 PM and 57% being its lowest at 4 PM. Barometric pressure is its highest of 30.04inHg at 10 PM, a lowest point of 29.96inHg at 4 PM with an avg 30inHg.
Sun River, MT Weather – 5-21 – Scattered Showers
60° / 43°

Weather Tomorrow

Scattered Showers
In Sun River, on and off showers are set to occur with highs near 60°F and lows around 43°F. The chance of rain is 87% with an estimated 0.04in. Wind will be moderate, blowing around 12mph on average and gusts of 16.3mph at 1 AM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 90% at 2 AM and 35% being its lowest at 4 PM. Barometric pressure is its highest of 30.12inHg at 8 AM, a lowest point of 29.91inHg at 6 PM with an avg 30.02inHg.
Sun River, MT Weather – 5-22 – Sunny
68° / 42°
Sunny
Sun River could see a sunny day with daytime highs of 68°F and nighttime lows near 42°F. Wind will be moderate, blowing around 12mph on average and gusts of 13.6mph at 4 PM. Humidity levels should be comfortable, sitting around 50% on average, the maximum being 72% at 5 AM and 28% being its lowest at 2 PM. Barometric pressure is its highest of 29.94inHg at 1 AM, a lowest point of 29.75inHg at 6 PM with an avg 29.84inHg.
Sun River, MT Weather – 5-23 – Sunny
75° / 49°
Sunny
Sun River may see sunshine, with daytime highs of 75°F and overnight lows near 49°F. Winds will be strong at speeds peaking at 22mph and gusts of 25.2mph at 3 PM. Humidity levels should be comfortable, sitting around 47% on average, the maximum being 64% at 2 AM and 21% being its lowest at 6 PM. Barometric pressure is its highest of 29.83inHg at 1 AM, a lowest point of 29.59inHg at 4 PM with an avg 29.7inHg.
Sun River, MT Weather – 5-24 – Partly Cloudy
73° / 55°
Partly Cloudy
Sun River could see cloudy skies with daytime highs of 73°F and nighttime lows near 55°F. Winds will be strong at speeds peaking at 23mph and gusts of 30.6mph at 6 AM. Humidity levels should be comfortable, sitting around 32% on average, the maximum being 43% at 6 AM and 23% being its lowest at 12 PM. Barometric pressure is its highest of 29.8inHg at 9 AM, a lowest point of 29.72inHg at 6 PM with an avg 29.76inHg.
Sun River, MT Weather – 5-25 – Sunny
77° / 59°
Sunny
In Sun River, sunshine is likely with a high near 77°F and a low around 59°F. Winds will be strong at speeds peaking at 28mph and gusts of 31.7mph at 12 PM. Humidity levels should be comfortable, sitting around 35% on average, the maximum being 56% at 11 PM and 27% being its lowest at 3 PM. Barometric pressure is its highest of 29.81inHg at 12 AM, a lowest point of 29.65inHg at 6 PM with an avg 29.74inHg.

Currently

Clear 43°F
29.98 inHg.
Barometer
67%
Humidity
WNW 10.1 mph
Wind
Clear

5 Day Forecast Nearby

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