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Mason, IL Weather Tomorrow

Get a closer look at tomorrow's weather in Mason and the upcoming 5 day forecast with daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details across the Mason area and around Effingham county, Illinois.
Updated: Sat Aug 29th 2026 8:30 AM CDT
Mason, IL Weather – 8-29 – Overcast
88° / 61°
Overcast
In Mason, cloud-filled skies are likely with a high near 88°F and a low around 61°F. There's a very small chance of rainfall, only about 8%. Winds will be light at 9mph and gusts of 23.3mph at 11 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 63% at 8 PM and 33% being its lowest at 2 PM. Barometric pressure is its highest of 30.14inHg at 9 AM, a lowest point of 30.01inHg at 5 PM with an avg 30.05inHg.
Mason, IL Weather – 8-30 – Overcast
95° / 69°

Weather Tomorrow

Overcast
In Mason, cloud-filled skies are likely with a high near 95°F and a low around 69°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 14mph on average and gusts of 31.1mph at 11 PM. Humidity levels should be comfortable, sitting around 49% on average, the maximum being 72% at 6 AM and 24% being its lowest at 4 PM. Barometric pressure is its highest of 30.04inHg at 11 AM, a lowest point of 29.91inHg at 7 PM with an avg 29.98inHg.
Mason, IL Weather – 8-31 – Sunny
99° / 76°
Sunny
A sunny day is in the forecast for Mason, with a high of 99°F and a low of 76°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 17mph on average and gusts of 36.7mph at 5 AM. Humidity levels should be comfortable, sitting around 45% on average, the maximum being 59% at 7 AM and 27% being its lowest at 4 PM. Barometric pressure is its highest of 30inHg at 8 AM, a lowest point of 29.87inHg at 5 PM with an avg 29.94inHg.
Mason, IL Weather – 9-1 – Sunny
102° / 80°
Sunny
Daytime highs will reach 102°F with lows dropping to 80°F in Mason, where bright and sunny conditions. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 16mph on average and gusts of 36.7mph at 3 AM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 60% at 7 AM and 25% being its lowest at 4 PM. Barometric pressure is its highest of 29.98inHg at 9 AM, a lowest point of 29.88inHg at 5 PM with an avg 29.93inHg.
Mason, IL Weather – 9-2 – Sunny
101° / 79°
Sunny
In Mason, a sunny day is likely with a high near 101°F and a low around 79°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 17mph on average and gusts of 33.6mph at 1 AM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 62% at 7 AM and 25% being its lowest at 3 PM. Barometric pressure is its highest of 29.97inHg at 11 AM, a lowest point of 29.87inHg at 7 PM with an avg 29.92inHg.
Mason, IL Weather – 9-3 – Sunny
103° / 80°
Sunny
Mason could see sunshine with daytime highs of 103°F and nighttime lows near 80°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 12mph on average and gusts of 27.3mph at 12 AM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 53% at 7 AM and 23% being its lowest at 1 PM. Barometric pressure is its highest of 29.96inHg at 10 AM, a lowest point of 29.89inHg at 7 PM with an avg 29.93inHg.

Currently

Overcast 66°F
30.14 inHg.
Barometer
82%
Humidity
SE 9.4 mph
Wind
Overcast

5 Day Forecast Nearby

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