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As of 16:01 CDT

Weather in Mason, IL

77°Current weather

Mason, Wednesday, 14 October, 16:01

Overcast. Feels like 78°. High 77°, low 70°.

Pressure30.00 inHg
Wind3.4 mph SE
Humidity78%
Visibility6.1 mi
Dew point70°
Thu, 1575° / 68°0.72Heavy rain
75 °Heavy rain

Mason, Thursday, 15 October

Heavy rain. High 75°, low 68°.

Pressure29.97 inHg
Wind8 mph S
Humidity78%
Visibility6.2 mi
Dew point70°
Fri, 1669° / 51°0.14Rain
69 °Rain

Mason, Friday, 16 October

Rain. High 69°, low 51°.

Pressure30.12 inHg
Wind18.4 mph NW
Humidity45%
Visibility6.2 mi
Dew point36°
Sat, 1758° / 44°0Clear
58 °Clear

Mason, Saturday, 17 October

Clear. High 58°, low 44°.

Pressure30.53 inHg
Wind7.5 mph N
Humidity52%
Visibility6.2 mi
Dew point38°
Sun, 1861° / 39°0Clear
61 °Clear

Mason, Sunday, 18 October

Clear. High 61°, low 39°.

Pressure30.50 inHg
Wind5.3 mph SE
Humidity45%
Visibility6.2 mi
Dew point35°
Mon, 1965° / 40°0Overcast
65 °Overcast

Mason, Monday, 19 October

Overcast. High 65°, low 40°.

Pressure30.42 inHg
Wind4 mph NE
Humidity37%
Visibility—
Dew point34°
Tue, 2073° / 45°0Partly cloudy
73 °Partly cloudy

Mason, Tuesday, 20 October

Partly cloudy. High 73°, low 45°.

Pressure30.30 inHg
Wind6.7 mph SE
Humidity45%
Visibility—
Dew point45°
Wed, 2176° / 62°0Partly cloudy
76 °Partly cloudy

Mason, Wednesday, 21 October

Partly cloudy. High 76°, low 62°.

Pressure30.24 inHg
Wind10.2 mph S
Humidity46%
Visibility—
Dew point51°
Thu, 2273° / 61°0.06Light rain
73 °Light rain

Mason, Thursday, 22 October

Light rain. High 73°, low 61°.

Pressure30.09 inHg
Wind13.6 mph S
Humidity54%
Visibility—
Dew point54°
Fri, 2380° / 62°0.02Light rain
80 °Light rain

Mason, Friday, 23 October

Light rain. High 80°, low 62°.

Pressure30.06 inHg
Wind7.6 mph SE
Humidity60%
Visibility—
Dew point61°
Sat, 2483° / 62°0Overcast
83 °Overcast

Mason, Saturday, 24 October

Overcast. High 83°, low 62°.

Pressure30.00 inHg
Wind19.6 mph SW
Humidity34%
Visibility—
Dew point50°
Sun, 2562° / 48°0Overcast
62 °Overcast

Mason, Sunday, 25 October

Overcast. High 62°, low 48°.

Pressure30.33 inHg
Wind13.7 mph NW
Humidity29%
Visibility—
Dew point27°
Mon, 2660° / 43°0Clear
60 °Clear

Mason, Monday, 26 October

Clear. High 60°, low 43°.

Pressure30.39 inHg
Wind6.9 mph NE
Humidity26%
Visibility—
Dew point22°
Tue, 2761° / 41°0Overcast
61 °Overcast

Mason, Tuesday, 27 October

Overcast. High 61°, low 41°.

Pressure30.27 inHg
Wind6.1 mph SE
Humidity26%
Visibility—
Dew point23°
Wed, 2858° / 51°0.11Light rain
58 °Light rain

Mason, Wednesday, 28 October

Light rain. High 58°, low 51°.

Pressure30.09 inHg
Wind6.4 mph SE
Humidity31%
Visibility—
Dew point27°
Thu, 2962° / 48°0.09Light rain
62 °Light rain

Mason, Thursday, 29 October

Light rain. High 62°, low 48°.

Pressure30.09 inHg
Wind7.5 mph W
Humidity61%
Visibility—
Dew point45°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mason, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Mason, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.