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Sidney, MT Weather Forecast for 5-Days

Updated: Sat Jun 6th 2026 8:15 PM MDT

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Sidney, MT Weather – 6-6 – Scattered Showers
99° / 60°
Scattered Showers
In Sidney, on and off showers are set to occur with highs near 99°F and lows around 60°F. Rainfall predicted to have a 73% chance with an estimated 0.08in. Winds will be strong at speeds peaking at 21mph and gusts of 41.5mph at 9 PM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 80% at 11 PM and 34% being its lowest at 9 PM. Barometric pressure is its highest of 29.49inHg at 10 PM, a lowest point of 29.38inHg at 9 PM with an avg 29.44inHg.
Sidney, MT Weather – 6-7 – Moderate Rain
89° / 56°

Weather Tomorrow

Moderate Rain
Sidney may see rain showers, with daytime highs of 89°F and overnight lows near 56°F. Rainfall predicted to have a 73% chance with an estimated 0.49in. Winds will be strong at speeds peaking at 37mph and gusts of 50mph at 7 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 90% at 5 AM and 35% being its lowest at 5 PM. Barometric pressure is its highest of 29.67inHg at 11 PM, a lowest point of 29.23inHg at 6 PM with an avg 29.4inHg.
Sidney, MT Weather – 6-8 – Sunny
76° / 49°
Sunny
In Sidney, a sunny day is likely with a high near 76°F and a low around 49°F. Wind will be moderate, blowing around 17mph on average and gusts of 23.5mph at 12 AM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 76% at 3 AM and 20% being its lowest at 3 PM. Barometric pressure is its highest of 29.79inHg at 9 AM, a lowest point of 29.68inHg at 6 PM with an avg 29.74inHg.
Sidney, MT Weather – 6-9 – Scattered Showers
79° / 59°
Scattered Showers
Sidney is set for passing showers with temperatures peaking at 79°F and dipping to 59°F. Rainfall predicted to have a 73% chance with an estimated 0.02in. Winds will be strong at speeds peaking at 24mph and gusts of 30.9mph at 5 AM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 78% at 7 AM and 36% being its lowest at 12 AM. Barometric pressure is its highest of 29.65inHg at 12 AM, a lowest point of 29.36inHg at 1 PM with an avg 29.47inHg.
Sidney, MT Weather – 6-10 – Scattered Thunderstorms
67° / 51°
Scattered Thunderstorms
In Sidney, stormy weather is expected with highs near 67°F and lows around 51°F. There's a very small chance of rainfall, only about 1%. Winds will be strong at speeds peaking at 21mph and gusts of 25.2mph at 9 PM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 79% at 11 PM and 38% being its lowest at 6 PM. Barometric pressure is its highest of 29.65inHg at 11 PM, a lowest point of 29.52inHg at 8 AM with an avg 29.55inHg.
Sidney, MT Weather – 6-11 – Scattered Showers
64° / 52°
Scattered Showers
In Sidney, scattered showers are likely with a high near 64°F and a low around 52°F. The chance of rain is 79% with an estimated 0.11in. Winds will be strong at speeds peaking at 25mph and gusts of 28.9mph at 5 AM. The humidity will be on the higher side, averaging about 74%, the maximum being 86% at 5 AM and 49% being its lowest at 3 PM. Barometric pressure is its highest of 29.89inHg at 11 PM, a lowest point of 29.65inHg at 12 AM with an avg 29.79inHg.

Currently

Sunny 91°F
29.46 inHg.
Barometer
42%
Humidity
SSE 25.9 mph
Wind
Sunny

5 Day Forecast Nearby

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