As of 11:40 CDT

Weather in Allen, IL

52°

Allen, Saturday, 17 October, 11:40

Clear. Feels like 49°. High 54°, low 37°.

Pressure30.56 inHg

Wind2 mph S

Humidity63%

Visibility6.2 mi

Dew point39°

See detailed hourly forecast

Sun, 1863° / 41°

63 °

Allen, Sunday, 18 October

Clear. High 63°, low 41°.

Pressure30.47 inHg

Wind10.7 mph S

Humidity44%

Visibility6.2 mi

Dew point37°

Mon, 1967° / 42°

67 °

Allen, Monday, 19 October

Clear. High 67°, low 42°.

Pressure30.39 inHg

Wind3.5 mph S

Humidity49%

Visibility6.2 mi

Dew point43°

Tue, 2068° / 42°

68 °

Allen, Tuesday, 20 October

Clear. High 68°, low 42°.

Pressure30.36 inHg

Wind3.8 mph SE

Humidity45%

Visibility6.2 mi

Dew point44°

Wed, 2170° / 45°

70 °

Allen, Wednesday, 21 October

Clear. High 70°, low 45°.

Pressure30.27 inHg

Wind4.1 mph SE

Humidity43%

Visibility—

Dew point43°

Thu, 2272° / 47°

72 °

Allen, Thursday, 22 October

Clear. High 72°, low 47°.

Pressure30.24 inHg

Wind5.6 mph E

Humidity43%

Visibility—

Dew point44°

Fri, 2376° / 53°

76 °

Allen, Friday, 23 October

Clear. High 76°, low 53°.

Pressure30.15 inHg

Wind9.6 mph S

Humidity30%

Visibility—

Dew point38°

Sat, 2475° / 58°

75 °

Allen, Saturday, 24 October

Overcast. High 75°, low 58°.

Pressure30.12 inHg

Wind14.9 mph S

Humidity30%

Visibility—

Dew point37°

Sun, 2572° / 56°

72 °

Allen, Sunday, 25 October

Overcast. High 72°, low 56°.

Pressure30.06 inHg

Wind15.3 mph W

Humidity58%

Visibility—

Dew point55°

Mon, 2670° / 49°

70 °

Allen, Monday, 26 October

Clear. High 70°, low 49°.

Pressure30.18 inHg

Wind8.9 mph SE

Humidity40%

Visibility—

Dew point40°

Tue, 2780° / 62°

80 °

Allen, Tuesday, 27 October

Overcast. High 80°, low 62°.

Pressure30.03 inHg

Wind18 mph SW

Humidity27%

Visibility—

Dew point41°

Wed, 2868° / 61°

0.36

68 °

Allen, Wednesday, 28 October

Rain. High 68°, low 61°.

Pressure29.94 inHg

Wind17.7 mph S

Humidity69%

Visibility—

Dew point52°

Thu, 2965° / 51°

0.05

65 °

Allen, Thursday, 29 October

Light rain. High 65°, low 51°.

Pressure30.09 inHg

Wind14 mph W

Humidity39%

Visibility—

Dew point35°

Fri, 3076° / 57°

0.76

76 °

Allen, Friday, 30 October

Rain. High 76°, low 57°.

Pressure29.74 inHg

Wind22.2 mph S

Humidity79%

Visibility—

Dew point62°

Sat, 3172° / 51°

0.22

72 °

Allen, Saturday, 31 October

Rain. High 72°, low 51°.

Pressure29.80 inHg

Wind24.1 mph W

Humidity41%

Visibility—

Dew point38°

Sun, 0162° / 45°

62 °

Allen, Sunday, 1 November

Mostly clear. High 62°, low 45°.

Pressure30.18 inHg

Wind7.6 mph SE

Humidity31%

Visibility—

Dew point28°

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 Allen, 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 Allen, 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.