Harrisburg, PA Weather Tomorrow

Stay one step ahead with tomorrow's weather in Harrisburg and a reliable 5 day forecast including precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill across the Harrisburg area and around Dauphin county, Pennsylvania.
Updated: Sun Sep 20th 2026 12:00 AM EDT
Harrisburg, PA Weather – 9-20 – Light Rain Shower
75° / 63°
Light Rain Shower
Daytime highs will reach 75°F with lows dropping to 63°F in Harrisburg, where periods of rain are likely. The chance of rain is 89% with an estimated 0.29in. Wind will be moderate, blowing around 13mph on average and gusts of 27.8mph at 2 AM. High humidity with average of 89% is anticipated, the maximum being 95% at 7 AM and 71% being its lowest at 12 PM. Barometric pressure is its highest of 30.05inHg at 1 AM, a lowest point of 29.88inHg at 6 PM with an avg 29.95inHg.
Harrisburg, PA Weather – 9-21 – Light Rain Shower
66° / 54°

Weather Tomorrow

Light Rain Shower
In Harrisburg, periods of rain are likely with highs near 66°F and lows around 54°F. The chance of rain is 94% with an estimated 0.92in. Wind will be moderate, blowing around 11mph on average and gusts of 24.9mph at 10 PM. High humidity with average of 96% is anticipated, the maximum being 98% at 6 AM and 94% being its lowest at 10 PM. Barometric pressure is its highest of 30.12inHg at 10 PM, a lowest point of 29.96inHg at 1 AM with an avg 30.04inHg.
Harrisburg, PA Weather – 9-22 – Light Rain Shower
56° / 49°
Light Rain Shower
Rain is in the forecast for Harrisburg, with a high of 56°F and a low of 49°F. The chance of rain is 93% with an estimated 0.48in. Wind will be moderate, blowing around 15mph on average and gusts of 29.3mph at 5 PM. High humidity with average of 95% is anticipated, the maximum being 98% at 2 AM and 94% being its lowest at 6 AM. Barometric pressure is its highest of 30.31inHg at 11 PM, a lowest point of 30.12inHg at 1 AM with an avg 30.2inHg.
Harrisburg, PA Weather – 9-23 – Overcast
60° / 48°
Overcast
Highs will reach 60°F with lows near 48°F in Harrisburg, where overcast is. There's a moderate 43% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 14mph on average and gusts of 28mph at 12 AM. The humidity will be on the higher side, averaging about 74%, the maximum being 94% at 12 AM and 61% being its lowest at 4 PM. Barometric pressure is its highest of 30.37inHg at 11 AM, a lowest point of 30.3inHg at 4 AM with an avg 30.33inHg.
Harrisburg, PA Weather – 9-24 – Overcast
63° / 47°
Overcast
Cloud-filled skies are in the forecast for Harrisburg, with a high of 63°F and a low of 47°F. There might be light rainfall having a 14% chance. Wind will be moderate, blowing around 11mph on average and gusts of 23mph at 12 AM. The humidity will be on the higher side, averaging about 66%, the maximum being 82% at 7 AM and 47% being its lowest at 3 PM. Barometric pressure is its highest of 30.34inHg at 12 AM, a lowest point of 30.22inHg at 5 PM with an avg 30.29inHg.
Harrisburg, PA Weather – 9-25 – Sunny
69° / 47°
Sunny
Harrisburg may see sunshine, with daytime highs of 69°F and overnight lows near 47°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 10mph and gusts of 19mph at 8 PM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 78% at 5 AM and 32% being its lowest at 2 PM. Barometric pressure is its highest of 30.26inHg at 10 AM, a lowest point of 30.17inHg at 5 PM with an avg 30.23inHg.

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