As of 11:52 CDT

Weather in Castleton, IL

75°

Castleton, Wednesday, 7 October, 11:52

Partly cloudy. Feels like 75°. High 77°, low 56°.

Pressure29.88 inHg

Wind8.4 mph NW

Humidity65%

Visibility6.2 mi

Dew point62°

See detailed hourly forecast

Thu, 0874° / 51°

74 °

Castleton, Thursday, 8 October

Clear. High 74°, low 51°.

Pressure30.12 inHg

Wind4.4 mph N

Humidity45%

Visibility6.2 mi

Dew point46°

Fri, 0977° / 51°

77 °

Castleton, Friday, 9 October

Overcast. High 77°, low 51°.

Pressure30.12 inHg

Wind11.1 mph S

Humidity51%

Visibility6.2 mi

Dew point53°

Sat, 1081° / 60°

81 °

Castleton, Saturday, 10 October

Clear. High 81°, low 60°.

Pressure30.09 inHg

Wind10.4 mph S

Humidity50%

Visibility6.2 mi

Dew point57°

Sun, 1168° / 59°

0.19

68 °

Castleton, Sunday, 11 October

Light rain. High 68°, low 59°.

Pressure29.85 inHg

Wind8 mph SE

Humidity68%

Visibility—

Dew point56°

Mon, 1280° / 55°

80 °

Castleton, Monday, 12 October

Clear. High 80°, low 55°.

Pressure29.80 inHg

Wind10.9 mph NW

Humidity59%

Visibility—

Dew point59°

Tue, 1365° / 47°

65 °

Castleton, Tuesday, 13 October

Light rain. High 65°, low 47°.

Pressure30.00 inHg

Wind23.4 mph NW

Humidity59%

Visibility—

Dew point46°

Wed, 1462° / 40°

62 °

Castleton, Wednesday, 14 October

Overcast. High 62°, low 40°.

Pressure30.18 inHg

Wind11 mph SE

Humidity50%

Visibility—

Dew point38°

Thu, 1580° / 53°

80 °

Castleton, Thursday, 15 October

Partly cloudy. High 80°, low 53°.

Pressure29.88 inHg

Wind19.5 mph S

Humidity38%

Visibility—

Dew point44°

Fri, 1674° / 52°

74 °

Castleton, Friday, 16 October

Overcast. High 74°, low 52°.

Pressure29.88 inHg

Wind16.6 mph W

Humidity55%

Visibility—

Dew point49°

Sat, 1754° / 46°

54 °

Castleton, Saturday, 17 October

Overcast. High 54°, low 46°.

Pressure30.03 inHg

Wind14.7 mph W

Humidity61%

Visibility—

Dew point39°

Sun, 1849° / 46°

49 °

Castleton, Sunday, 18 October

Overcast. High 49°, low 46°.

Pressure30.09 inHg

Wind14.2 mph W

Humidity70%

Visibility—

Dew point37°

Mon, 1958° / 46°

58 °

Castleton, Monday, 19 October

Partly cloudy. High 58°, low 46°.

Pressure30.21 inHg

Wind8.6 mph NW

Humidity55%

Visibility—

Dew point39°

Tue, 2066° / 44°

66 °

Castleton, Tuesday, 20 October

Clear. High 66°, low 44°.

Pressure30.18 inHg

Wind7.3 mph NW

Humidity48%

Visibility—

Dew point41°

Wed, 2158° / 43°

58 °

Castleton, Wednesday, 21 October

Clear. High 58°, low 43°.

Pressure30.27 inHg

Wind10 mph E

Humidity49%

Visibility—

Dew point36°

Thu, 2257° / 40°

57 °

Castleton, Thursday, 22 October

Overcast. High 57°, low 40°.

Pressure30.27 inHg

Wind6.9 mph E

Humidity42%

Visibility—

Dew point30°

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 Castleton, 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 Castleton, 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.