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Harmon, IL Weather Forecast for 5-Days

Updated: Wed May 20th 2026 11:15 PM CDT

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Harmon, IL Weather – 5-20 – Sunny
62° / 44°
Sunny
Harmon, IL Weather – 5-21 – Sunny
68° / 43°

Weather Tomorrow

Sunny
It will be sunny in Harmon, with a high of 68°F and a low of 43°F. Wind will be moderate, blowing around 15mph on average and gusts of 22.2mph at 8 PM. The humidity will be on the higher side, averaging about 61%, the maximum being 73% at 6 AM and 46% being its lowest at 3 PM. Barometric pressure is its highest of 30.32inHg at 12 AM, a lowest point of 30.14inHg at 6 PM with an avg 30.24inHg.
Harmon, IL Weather – 5-22 – Scattered Showers
56° / 51°
Scattered Showers
Harmon is set for passing showers with temperatures peaking at 56°F and dipping to 51°F. The chance of rain is 79% with an estimated 0.08in. Wind will be moderate, blowing around 15mph on average and gusts of 20mph at 9 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 94% at 10 PM and 65% being its lowest at 6 AM. Barometric pressure is its highest of 30.17inHg at 12 AM, a lowest point of 30.01inHg at 7 PM with an avg 30.07inHg.
Harmon, IL Weather – 5-23 – Scattered Showers
72° / 54°
Scattered Showers
In Harmon, on and off showers are set to occur with highs near 72°F and lows around 54°F. The chance of rain is 78% with an estimated 0.02in. Winds will be light at 10mph and gusts of 15.3mph at 12 AM. High humidity with average of 84% is anticipated, the maximum being 97% at 4 AM and 72% being its lowest at 4 PM. Barometric pressure is its highest of 30.05inHg at 9 AM, a lowest point of 29.96inHg at 7 PM with an avg 30inHg.
Harmon, IL Weather – 5-24 – Scattered Showers
79° / 65°
Scattered Showers
Harmon may see passing showers, with daytime highs of 79°F and overnight lows near 65°F. Rainfall predicted to have a 74% chance with an estimated 0.07in. Wind will be moderate, blowing around 11mph on average and gusts of 14.3mph at 4 PM. High humidity with average of 82% is anticipated, the maximum being 95% at 4 AM and 65% being its lowest at 4 PM. Barometric pressure is its highest of 30.04inHg at 10 AM, a lowest point of 30.01inHg at 5 PM with an avg 30.02inHg.
Harmon, IL Weather – 5-25 – Scattered Showers
74° / 66°
Scattered Showers
Showers likely at times in Harmon, with a high of 74°F and a low of 66°F. The chance of rain is 88% with an estimated 0.14in. Winds will be light at 10mph and gusts of 12.5mph at 11 PM. High humidity with average of 87% is anticipated, the maximum being 95% at 4 AM and 72% being its lowest at 1 PM. Barometric pressure is its highest of 30.05inHg at 7 AM, a lowest point of 29.89inHg at 11 PM with an avg 29.98inHg.

Currently

Clear 48°F
30.32 inHg.
Barometer
71%
Humidity
ENE 16.6 mph
Wind
Clear

5 Day Forecast Nearby

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