As of 22:08 CDT

Weather in Sumner, IL

70°

Sumner, Wednesday, 7 October, 22:08

Clear. Feels like 69°. High 85°, low 51°.

Pressure29.94 inHg

Wind0 mph N

Humidity60%

Visibility6.2 mi

Dew point55°

See detailed hourly forecast

Thu, 0882° / 52°

82 °

Sumner, Thursday, 8 October

Clear. High 82°, low 52°.

Pressure30.09 inHg

Wind2 mph SW

Humidity29%

Visibility6.2 mi

Dew point44°

Fri, 0984° / 50°

84 °

Sumner, Friday, 9 October

Clear. High 84°, low 50°.

Pressure30.15 inHg

Wind8.2 mph S

Humidity31%

Visibility6.2 mi

Dew point47°

Sat, 1081° / 60°

0.01

81 °

Sumner, Saturday, 10 October

Light rain. High 81°, low 60°.

Pressure30.15 inHg

Wind5.8 mph E

Humidity44%

Visibility6.2 mi

Dew point55°

Sun, 1169° / 61°

0.32

69 °

Sumner, Sunday, 11 October

Rain. High 69°, low 61°.

Pressure29.91 inHg

Wind5.9 mph E

Humidity81%

Visibility6.2 mi

Dew point60°

Mon, 1284° / 59°

84 °

Sumner, Monday, 12 October

Clear. High 84°, low 59°.

Pressure29.91 inHg

Wind12.4 mph SW

Humidity48%

Visibility—

Dew point56°

Tue, 1373° / 57°

73 °

Sumner, Tuesday, 13 October

Light rain. High 73°, low 57°.

Pressure29.94 inHg

Wind15 mph N

Humidity54%

Visibility—

Dew point55°

Wed, 1468° / 46°

68 °

Sumner, Wednesday, 14 October

Partly cloudy. High 68°, low 46°.

Pressure30.06 inHg

Wind9.7 mph SE

Humidity33%

Visibility—

Dew point35°

Thu, 1592° / 62°

92 °

Sumner, Thursday, 15 October

Clear. High 92°, low 62°.

Pressure29.91 inHg

Wind18.5 mph SW

Humidity41%

Visibility—

Dew point60°

Fri, 1687° / 72°

87 °

Sumner, Friday, 16 October

Partly cloudy. High 87°, low 72°.

Pressure30.00 inHg

Wind20.7 mph SW

Humidity45%

Visibility—

Dew point62°

Sat, 1765° / 52°

0.05

65 °

Sumner, Saturday, 17 October

Light rain. High 65°, low 52°.

Pressure30.21 inHg

Wind14.5 mph NW

Humidity48%

Visibility—

Dew point37°

Sun, 1862° / 43°

62 °

Sumner, Sunday, 18 October

Light rain. High 62°, low 43°.

Pressure30.27 inHg

Wind8.9 mph NW

Humidity38%

Visibility—

Dew point32°

Mon, 1965° / 41°

65 °

Sumner, Monday, 19 October

Clear. High 65°, low 41°.

Pressure30.27 inHg

Wind6.7 mph N

Humidity32%

Visibility—

Dew point30°

Tue, 2072° / 45°

72 °

Sumner, Tuesday, 20 October

Overcast. High 72°, low 45°.

Pressure30.15 inHg

Wind7.9 mph N

Humidity27%

Visibility—

Dew point30°

Wed, 2165° / 45°

65 °

Sumner, Wednesday, 21 October

Overcast. High 65°, low 45°.

Pressure30.18 inHg

Wind11.5 mph NE

Humidity28%

Visibility—

Dew point27°

Thu, 2260° / 50°

0.25

60 °

Sumner, Thursday, 22 October

Rain. High 60°, low 50°.

Pressure29.85 inHg

Wind13.3 mph S

Humidity87%

Visibility—

Dew point49°

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 Sumner, 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 Sumner, 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.