As of 08:11 CDT

Weather in Colchester, IL

37°

Colchester, Saturday, 17 October, 08:11

Clear. Feels like 32°. High 55°, low 37°.

Pressure30.56 inHg

Wind5.7 mph NW

Humidity92%

Visibility6.2 mi

Dew point35°

See detailed hourly forecast

Sun, 1862° / 40°

62 °

Colchester, Sunday, 18 October

Clear. High 62°, low 40°.

Pressure30.45 inHg

Wind10.9 mph S

Humidity51%

Visibility6.2 mi

Dew point41°

Mon, 1966° / 42°

66 °

Colchester, Monday, 19 October

Clear. High 66°, low 42°.

Pressure30.39 inHg

Wind4.4 mph S

Humidity53%

Visibility6.2 mi

Dew point44°

Tue, 2067° / 43°

67 °

Colchester, Tuesday, 20 October

Light rain. High 67°, low 43°.

Pressure30.36 inHg

Wind4.6 mph SE

Humidity53%

Visibility6.2 mi

Dew point47°

Wed, 2170° / 47°

70 °

Colchester, Wednesday, 21 October

Clear. High 70°, low 47°.

Pressure30.24 inHg

Wind6.1 mph S

Humidity42%

Visibility—

Dew point42°

Thu, 2272° / 50°

72 °

Colchester, Thursday, 22 October

Clear. High 72°, low 50°.

Pressure30.21 inHg

Wind6.9 mph SE

Humidity45%

Visibility—

Dew point46°

Fri, 2375° / 55°

75 °

Colchester, Friday, 23 October

Overcast. High 75°, low 55°.

Pressure30.15 inHg

Wind11.6 mph S

Humidity32%

Visibility—

Dew point40°

Sat, 2476° / 57°

76 °

Colchester, Saturday, 24 October

Overcast. High 76°, low 57°.

Pressure30.12 inHg

Wind13.3 mph S

Humidity33%

Visibility—

Dew point41°

Sun, 2573° / 55°

0.43

73 °

Colchester, Sunday, 25 October

Rain. High 73°, low 55°.

Pressure29.97 inHg

Wind11.6 mph NW

Humidity38%

Visibility—

Dew point44°

Mon, 2651° / 41°

0.38

51 °

Colchester, Monday, 26 October

Rain. High 51°, low 41°.

Pressure30.21 inHg

Wind17.2 mph NW

Humidity56%

Visibility—

Dew point34°

Tue, 2754° / 37°

54 °

Colchester, Tuesday, 27 October

Overcast. High 54°, low 37°.

Pressure30.42 inHg

Wind10.1 mph SE

Humidity46%

Visibility—

Dew point30°

Wed, 2860° / 47°

0.66

60 °

Colchester, Wednesday, 28 October

Rain. High 60°, low 47°.

Pressure30.03 inHg

Wind20.1 mph SW

Humidity90%

Visibility—

Dew point44°

Thu, 2962° / 50°

62 °

Colchester, Thursday, 29 October

Clear. High 62°, low 50°.

Pressure30.09 inHg

Wind23.9 mph SW

Humidity50%

Visibility—

Dew point41°

Fri, 3067° / 47°

67 °

Colchester, Friday, 30 October

Overcast. High 67°, low 47°.

Pressure30.00 inHg

Wind16.8 mph SE

Humidity43%

Visibility—

Dew point39°

Sat, 3170° / 61°

0.39

70 °

Colchester, Saturday, 31 October

Rain. High 70°, low 61°.

Pressure29.53 inHg

Wind22.1 mph S

Humidity91%

Visibility—

Dew point64°

Sun, 0160° / 45°

60 °

Colchester, Sunday, 1 November

Overcast. High 60°, low 45°.

Pressure30.00 inHg

Wind15.3 mph SW

Humidity57%

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 Colchester, 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 Colchester, 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.