Harrison, SD Weather Tomorrow

Know what to expect with tomorrow's Harrison weather and the next 5 days of forecasts covering precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Harrison area and around Douglas county, South Dakota.
Updated: Thu Sep 24th 2026 4:15 AM CDT
Harrison, SD Weather – 9-24 – Overcast
64° / 56°
Overcast
Harrison is set for cloud-filled skies with temperatures peaking at 64°F and dipping to 56°F. The chance of rain is 91% with an estimated 0.44in. Wind will be moderate, blowing around 17mph on average and gusts of 30.5mph at 5 AM. High humidity with average of 89% is anticipated, the maximum being 94% at 5 AM and 80% being its lowest at 3 PM. Barometric pressure is its highest of 30.12inHg at 10 PM, a lowest point of 30.06inHg at 4 PM with an avg 30.1inHg.
Harrison, SD Weather – 9-25 – Scattered Showers
59° / 56°

Weather Tomorrow

Scattered Showers
Harrison is set for scattered showers with temperatures peaking at 59°F and dipping to 56°F. The chance of rain is 83% with an estimated 0.09in. Wind will be moderate, blowing around 14mph on average and gusts of 21.7mph at 8 PM. High humidity with average of 93% is anticipated, the maximum being 97% at 11 PM and 88% being its lowest at 12 PM. Barometric pressure is its highest of 30.12inHg at 9 AM, a lowest point of 30inHg at 11 PM with an avg 30.08inHg.
Harrison, SD Weather – 9-26 – Scattered Showers
72° / 55°
Scattered Showers
In Harrison, on and off showers are set to occur with highs near 72°F and lows around 55°F. There's a moderate 34% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 15mph on average and gusts of 27.2mph at 8 PM. High humidity with average of 88% is anticipated, the maximum being 98% at 7 AM and 64% being its lowest at 5 PM. Barometric pressure is its highest of 29.99inHg at 12 AM, a lowest point of 29.82inHg at 6 PM with an avg 29.9inHg.
Harrison, SD Weather – 9-27 – Overcast
77° / 60°
Overcast
In Harrison, cloud-filled skies are likely with a high near 77°F and a low around 60°F. Rainfall predicted to have a 62% chance with an estimated 0.04in. Wind will be moderate, blowing around 17mph on average and gusts of 34.3mph at 11 PM. High humidity with average of 82% is anticipated, the maximum being 98% at 7 AM and 54% being its lowest at 4 PM. Barometric pressure is its highest of 29.97inHg at 11 AM, a lowest point of 29.83inHg at 8 PM with an avg 29.91inHg.
Harrison, SD Weather – 9-28 – Overcast
77° / 60°
Overcast
Daytime highs will reach 77°F with lows dropping to 60°F in Harrison, where it will be overcast. The chance of rain is 80% with an estimated 0.32in. Winds will be strong at speeds peaking at 23mph and gusts of 35.4mph at 10 PM. The humidity will be on the higher side, averaging about 74%, the maximum being 95% at 6 AM and 50% being its lowest at 4 PM. Barometric pressure is its highest of 29.88inHg at 1 AM, a lowest point of 29.61inHg at 11 PM with an avg 29.73inHg.
Harrison, SD Weather – 9-29 – Overcast
71° / 46°
Overcast
Daytime highs will reach 71°F with lows dropping to 46°F in Harrison, where it will be overcast. The chance of rain is 82% with an estimated 0.3in. Winds will be strong at speeds peaking at 22mph and gusts of 34.3mph at 7 PM. The humidity will be on the higher side, averaging about 78%, the maximum being 93% at 5 AM and 56% being its lowest at 7 PM. Barometric pressure is its highest of 30.01inHg at 11 PM, a lowest point of 29.53inHg at 4 AM with an avg 29.78inHg.

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