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Union County, OH Weather Tomorrow

See tomorrow's forecast for Union County together with a reliable 5 day outlook featuring 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 for the Union County area.
Updated: Mon Nov 9th 2026 3:00 PM EST
Union County, OH Weather – 11-9 – Sunny
58° / 41°
Sunny
Sunshine is in the forecast for Union County, with a high of 58°F and a low of 41°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 17.7mph at 9 PM. The humidity will be on the higher side, averaging about 68%, the maximum being 79% at 10 PM and 49% being its lowest at 4 PM. Barometric pressure is its highest of 30.11inHg at 6 PM, a lowest point of 30.08inHg at 4 PM with an avg 30.1inHg.
Union County, OH Weather – 11-10 – Sunny
63° / 43°

Weather Tomorrow

Sunny
Union County is set for sunshine with temperatures peaking at 63°F and dipping to 43°F. There's a very small chance of rainfall, only about 5%. Wind will be moderate, blowing around 12mph on average and gusts of 26.8mph at 8 AM. The humidity will be on the higher side, averaging about 68%, the maximum being 82% at 10 PM and 55% being its lowest at 2 PM. Barometric pressure is its highest of 30.08inHg at 12 AM, a lowest point of 29.98inHg at 2 PM with an avg 30.03inHg.
Union County, OH Weather – 11-11 – Overcast
62° / 42°
Overcast
Daytime highs will reach 62°F with lows dropping to 42°F in Union County, where it will be overcast. The chance of rain is 77% with an estimated 0.28in. Wind will be moderate, blowing around 13mph on average and gusts of 30.2mph at 11 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 92% at 7 AM and 42% being its lowest at 2 PM. Barometric pressure is its highest of 30.02inHg at 2 AM, a lowest point of 29.55inHg at 11 PM with an avg 29.86inHg.
Union County, OH Weather – 11-12 – Scattered Showers
53° / 35°
Scattered Showers
In Union County, on and off showers are set to occur with highs near 53°F and lows around 35°F. The chance of rain is 88% with an estimated 0.2in. Wind will be moderate, blowing around 17mph on average and gusts of 30.9mph at 12 AM. High humidity with average of 88% is anticipated, the maximum being 95% at 10 PM and 73% being its lowest at 2 PM. Barometric pressure is its highest of 29.71inHg at 9 PM, a lowest point of 29.49inHg at 3 AM with an avg 29.61inHg.
Union County, OH Weather – 11-13 – Scattered Showers
41° / 30°
Scattered Showers
Union County is set for scattered showers with temperatures peaking at 41°F and dipping to 30°F. There's a moderate 49% chance of rainfall with an estimated 0.03in. Snow is likely with a 32% chance with an estimated 0.1in. Wind will be moderate, blowing around 17mph on average and gusts of 27.1mph at 4 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 94% at 1 AM and 53% being its lowest at 2 PM. Barometric pressure is its highest of 29.89inHg at 10 PM, a lowest point of 29.7inHg at 12 AM with an avg 29.75inHg.
Union County, OH Weather – 11-14 – Partly Cloudy
41° / 32°
Partly Cloudy
Union County is set for overcast conditions with temperatures peaking at 41°F and dipping to 32°F. There might be light rainfall having a 22% chance with an estimated 0in. Snow is likely with a 19% chance with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 30.5mph at 10 AM. The humidity will be on the higher side, averaging about 76%, the maximum being 90% at 7 AM and 62% being its lowest at 4 PM. Barometric pressure is its highest of 30.17inHg at 11 PM, a lowest point of 29.77inHg at 12 AM with an avg 30.04inHg.

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