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As of 04:49 CDT

Weather in Mason, IL

50°Current weather

Mason, Friday, 9 October, 04:49

Clear. Feels like 49°. High 87°, low 50°.

Pressure30.09 inHg
Wind0 mph N
Humidity93%
Visibility6.2 mi
Dew point48°
Sat, 1080° / 56°0Overcast
80 °Overcast

Mason, Saturday, 10 October

Overcast. High 80°, low 56°.

Pressure30.09 inHg
Wind6.8 mph E
Humidity45%
Visibility6.2 mi
Dew point51°
Sun, 1178° / 58°0.04Light rain
78 °Light rain

Mason, Sunday, 11 October

Light rain. High 78°, low 58°.

Pressure29.91 inHg
Wind8 mph NW
Humidity57%
Visibility6.2 mi
Dew point57°
Mon, 1288° / 61°0Clear
88 °Clear

Mason, Monday, 12 October

Clear. High 88°, low 61°.

Pressure29.91 inHg
Wind10.1 mph SW
Humidity42%
Visibility6.2 mi
Dew point59°
Tue, 1390° / 69°0Clear
90 °Clear

Mason, Tuesday, 13 October

Clear. High 90°, low 69°.

Pressure29.85 inHg
Wind10.7 mph SW
Humidity46%
Visibility—
Dew point62°
Wed, 1483° / 68°1.14Rain
83 °Rain

Mason, Wednesday, 14 October

Rain. High 83°, low 68°.

Pressure29.88 inHg
Wind8.4 mph SE
Humidity73%
Visibility—
Dew point69°
Thu, 1590° / 61°0.27Light rain
90 °Light rain

Mason, Thursday, 15 October

Light rain. High 90°, low 61°.

Pressure29.83 inHg
Wind19.6 mph SW
Humidity46%
Visibility—
Dew point62°
Fri, 1672° / 49°0Overcast
72 °Overcast

Mason, Friday, 16 October

Overcast. High 72°, low 49°.

Pressure30.15 inHg
Wind19 mph W
Humidity35%
Visibility—
Dew point32°
Sat, 1749° / 42°0Partly cloudy
49 °Partly cloudy

Mason, Saturday, 17 October

Partly cloudy. High 49°, low 42°.

Pressure30.30 inHg
Wind14.7 mph NW
Humidity48%
Visibility—
Dew point29°
Sun, 1859° / 38°0Clear
59 °Clear

Mason, Sunday, 18 October

Clear. High 59°, low 38°.

Pressure30.33 inHg
Wind6.8 mph NE
Humidity41%
Visibility—
Dew point31°
Mon, 1965° / 42°0Mostly clear
65 °Mostly clear

Mason, Monday, 19 October

Mostly clear. High 65°, low 42°.

Pressure30.33 inHg
Wind7.4 mph NE
Humidity38%
Visibility—
Dew point34°
Tue, 2068° / 44°0Clear
68 °Clear

Mason, Tuesday, 20 October

Clear. High 68°, low 44°.

Pressure30.33 inHg
Wind8.3 mph E
Humidity31%
Visibility—
Dew point31°
Wed, 2171° / 46°0Clear
71 °Clear

Mason, Wednesday, 21 October

Clear. High 71°, low 46°.

Pressure30.27 inHg
Wind6.8 mph E
Humidity33%
Visibility—
Dew point35°
Thu, 2273° / 49°0Clear
73 °Clear

Mason, Thursday, 22 October

Clear. High 73°, low 49°.

Pressure30.21 inHg
Wind7.7 mph NE
Humidity31%
Visibility—
Dew point36°
Fri, 2373° / 51°0Clear
73 °Clear

Mason, Friday, 23 October

Clear. High 73°, low 51°.

Pressure30.12 inHg
Wind8 mph N
Humidity38%
Visibility—
Dew point42°
Sat, 2473° / 51°0Clear
73 °Clear

Mason, Saturday, 24 October

Clear. High 73°, low 51°.

Pressure30.06 inHg
Wind7 mph NE
Humidity33%
Visibility—
Dew point38°

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.