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Sullivan, OH Weather Tomorrow

Stay one step ahead with tomorrow's weather in Sullivan and a reliable 5 day forecast including daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details across the Sullivan area and around Ashland county, Ohio.
Updated: Sun Sep 20th 2026 6:45 PM EDT
Sullivan, OH Weather – 9-20 – Light Rain Shower
68° / 57°
Light Rain Shower
Periods of rain are likely in Sullivan, with a high of 68°F and a low of 57°F. The chance of rain is 88% with an estimated 0.18in. Wind will be moderate, blowing around 12mph on average and gusts of 22.9mph at 11 PM. High humidity with average of 93% is anticipated, the maximum being 97% at 9 PM and 92% being its lowest at 7 PM. Barometric pressure is its highest of 30.02inHg at 10 PM, a lowest point of 29.95inHg at 7 PM with an avg 29.99inHg.
Sullivan, OH Weather – 9-21 – Light Rain Shower
57° / 50°

Weather Tomorrow

Light Rain Shower
Periods of rain are likely in Sullivan, with a high of 57°F and a low of 50°F. The chance of rain is 93% with an estimated 0.4in. Wind will be moderate, blowing around 14mph on average and gusts of 29.1mph at 2 AM. High humidity with average of 93% is anticipated, the maximum being 97% at 10 PM and 87% being its lowest at 7 AM. Barometric pressure is its highest of 30.08inHg at 10 PM, a lowest point of 29.99inHg at 2 AM with an avg 30.04inHg.
Sullivan, OH Weather – 9-22 – Scattered Showers
58° / 50°
Scattered Showers
Sullivan is set for passing showers with temperatures peaking at 58°F and dipping to 50°F. Rainfall predicted to have a 72% chance with an estimated 0.04in. Wind will be moderate, blowing around 13mph on average and gusts of 25.3mph at 11 PM. High humidity with average of 91% is anticipated, the maximum being 96% at 3 AM and 80% being its lowest at 1 PM. Barometric pressure is its highest of 30.21inHg at 11 PM, a lowest point of 30.07inHg at 2 AM with an avg 30.13inHg.
Sullivan, OH Weather – 9-23 – Light Rain Shower
52° / 48°
Light Rain Shower
In Sullivan, periods of rain are likely with highs near 52°F and lows around 48°F. The chance of rain is 90% with an estimated 0.2in. Wind will be moderate, blowing around 14mph on average and gusts of 28.2mph at 9 PM. High humidity with average of 94% is anticipated, the maximum being 96% at 8 AM and 91% being its lowest at 3 AM. Barometric pressure is its highest of 30.34inHg at 9 PM, a lowest point of 30.21inHg at 12 AM with an avg 30.27inHg.
Sullivan, OH Weather – 9-24 – Sunny
62° / 48°
Sunny
Sullivan could see a sunny day with daytime highs of 62°F and nighttime lows near 48°F. There might be light rainfall having a 14% chance with an estimated 0in. Wind will be moderate, blowing around 12mph on average and gusts of 26.9mph at 1 AM. The humidity will be on the higher side, averaging about 75%, the maximum being 95% at 12 AM and 47% being its lowest at 4 PM. Barometric pressure is its highest of 30.36inHg at 9 AM, a lowest point of 30.28inHg at 5 PM with an avg 30.33inHg.
Sullivan, OH Weather – 9-25 – Sunny
62° / 46°
Sunny
It will be sunny in Sullivan, with a high of 62°F and a low of 46°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 14mph on average and gusts of 22.4mph at 12 AM. The humidity will be on the higher side, averaging about 67%, the maximum being 78% at 5 AM and 48% being its lowest at 2 PM. Barometric pressure is its highest of 30.33inHg at 12 AM, a lowest point of 30.21inHg at 5 PM with an avg 30.27inHg.

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