As of 15:44 CDT

Weather in Charleston, IL

65°

Charleston, Sunday, 18 October, 15:44

Clear. Feels like 63°. High 65°, low 37°.

Pressure30.39 inHg

Wind10.4 mph S

Humidity37%

Visibility6.2 mi

Dew point38°

See detailed hourly forecast

Mon, 1966° / 39°

66 °

Charleston, Monday, 19 October

Clear. High 66°, low 39°.

Pressure30.42 inHg

Wind2 mph SE

Humidity49%

Visibility6.2 mi

Dew point43°

Tue, 2069° / 46°

69 °

Charleston, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.36 inHg

Wind2.8 mph E

Humidity46%

Visibility6.2 mi

Dew point45°

Wed, 2169° / 46°

69 °

Charleston, Wednesday, 21 October

Clear. High 69°, low 46°.

Pressure30.30 inHg

Wind0.6 mph W

Humidity48%

Visibility6.2 mi

Dew point47°

Thu, 2268° / 46°

68 °

Charleston, Thursday, 22 October

Clear. High 68°, low 46°.

Pressure30.30 inHg

Wind4.7 mph NE

Humidity56%

Visibility6.2 mi

Dew point49°

Fri, 2367° / 49°

67 °

Charleston, Friday, 23 October

Clear. High 67°, low 49°.

Pressure30.30 inHg

Wind8 mph E

Humidity53%

Visibility—

Dew point46°

Sat, 2474° / 49°

74 °

Charleston, Saturday, 24 October

Overcast. High 74°, low 49°.

Pressure30.36 inHg

Wind10.6 mph S

Humidity35%

Visibility—

Dew point40°

Sun, 2578° / 58°

78 °

Charleston, Sunday, 25 October

Overcast. High 78°, low 58°.

Pressure30.33 inHg

Wind9.3 mph SW

Humidity28%

Visibility—

Dew point38°

Mon, 2671° / 57°

71 °

Charleston, Monday, 26 October

Overcast. High 71°, low 57°.

Pressure30.30 inHg

Wind7.1 mph NE

Humidity35%

Visibility—

Dew point40°

Tue, 2774° / 56°

74 °

Charleston, Tuesday, 27 October

Overcast. High 74°, low 56°.

Pressure30.27 inHg

Wind7 mph E

Humidity37%

Visibility—

Dew point42°

Wed, 2874° / 55°

74 °

Charleston, Wednesday, 28 October

Overcast. High 74°, low 55°.

Pressure30.21 inHg

Wind7.6 mph S

Humidity40%

Visibility—

Dew point44°

Thu, 2976° / 55°

76 °

Charleston, Thursday, 29 October

Overcast. High 76°, low 55°.

Pressure30.06 inHg

Wind13.2 mph S

Humidity34%

Visibility—

Dew point42°

Fri, 3069° / 59°

1.11

69 °

Charleston, Friday, 30 October

Heavy rain. High 69°, low 59°.

Pressure29.94 inHg

Wind16.7 mph SW

Humidity83%

Visibility—

Dew point60°

Sat, 3167° / 53°

67 °

Charleston, Saturday, 31 October

Overcast. High 67°, low 53°.

Pressure30.09 inHg

Wind7.6 mph N

Humidity39%

Visibility—

Dew point39°

Sun, 0171° / 59°

1.72

71 °

Charleston, Sunday, 1 November

Heavy rain. High 71°, low 59°.

Pressure29.88 inHg

Wind14.8 mph S

Humidity98%

Visibility—

Dew point64°

Mon, 0267° / 48°

0.66

67 °

Charleston, Monday, 2 November

Rain. High 67°, low 48°.

Pressure29.97 inHg

Wind20.1 mph N

Humidity86%

Visibility—

Dew point54°

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 Charleston, 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 Charleston, 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.