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As of 06:00 CDT

Weather in Calvin, IL

59°Current weather

Calvin, Saturday, 10 October, 06:00

Overcast. Feels like 59°. High 76°, low 54°.

Pressure30.06 inHg
Wind5.9 mph E
Humidity86%
Visibility6.2 mi
Dew point53°
Sun, 1181° / 52°0Clear
81 °Clear

Calvin, Sunday, 11 October

Clear. High 81°, low 52°.

Pressure29.97 inHg
Wind7.8 mph NW
Humidity58%
Visibility6.2 mi
Dew point57°
Mon, 1288° / 62°0Clear
88 °Clear

Calvin, Monday, 12 October

Clear. High 88°, low 62°.

Pressure29.97 inHg
Wind8.5 mph SW
Humidity45%
Visibility6.2 mi
Dew point61°
Tue, 1389° / 67°0Clear
89 °Clear

Calvin, Tuesday, 13 October

Clear. High 89°, low 67°.

Pressure29.91 inHg
Wind11 mph SW
Humidity41%
Visibility6.2 mi
Dew point59°
Wed, 1479° / 72°0.07Light rain
79 °Light rain

Calvin, Wednesday, 14 October

Light rain. High 79°, low 72°.

Pressure30.00 inHg
Wind8.6 mph N
Humidity72%
Visibility—
Dew point69°
Thu, 1575° / 67°0.12Light rain
75 °Light rain

Calvin, Thursday, 15 October

Light rain. High 75°, low 67°.

Pressure30.21 inHg
Wind12.9 mph S
Humidity55%
Visibility—
Dew point56°
Fri, 1670° / 58°0.09Light rain
70 °Light rain

Calvin, Friday, 16 October

Light rain. High 70°, low 58°.

Pressure30.00 inHg
Wind15.3 mph SW
Humidity51%
Visibility—
Dew point47°
Sat, 1756° / 41°0Overcast
56 °Overcast

Calvin, Saturday, 17 October

Overcast. High 56°, low 41°.

Pressure30.18 inHg
Wind18.6 mph NW
Humidity48%
Visibility—
Dew point29°
Sun, 1854° / 39°0Partly cloudy
54 °Partly cloudy

Calvin, Sunday, 18 October

Partly cloudy. High 54°, low 39°.

Pressure30.42 inHg
Wind15.3 mph NW
Humidity43%
Visibility—
Dew point29°
Mon, 1956° / 34°0Mostly clear
56 °Mostly clear

Calvin, Monday, 19 October

Mostly clear. High 56°, low 34°.

Pressure30.42 inHg
Wind6.7 mph NE
Humidity31%
Visibility—
Dew point21°
Tue, 2061° / 37°0Overcast
61 °Overcast

Calvin, Tuesday, 20 October

Overcast. High 61°, low 37°.

Pressure30.36 inHg
Wind6.4 mph SE
Humidity30%
Visibility—
Dew point24°
Wed, 2169° / 42°0Clear
69 °Clear

Calvin, Wednesday, 21 October

Clear. High 69°, low 42°.

Pressure30.30 inHg
Wind7.1 mph S
Humidity29%
Visibility—
Dew point30°
Thu, 2271° / 47°0Clear
71 °Clear

Calvin, Thursday, 22 October

Clear. High 71°, low 47°.

Pressure30.21 inHg
Wind12.6 mph S
Humidity31%
Visibility—
Dew point35°
Fri, 2365° / 49°0.06Light rain
65 °Light rain

Calvin, Friday, 23 October

Light rain. High 65°, low 49°.

Pressure30.00 inHg
Wind15.8 mph S
Humidity46%
Visibility—
Dew point42°
Sat, 2473° / 50°0.42Rain
73 °Rain

Calvin, Saturday, 24 October

Rain. High 73°, low 50°.

Pressure29.85 inHg
Wind15.3 mph SW
Humidity36%
Visibility—
Dew point41°
Sun, 2560° / 47°0.21Rain
60 °Rain

Calvin, Sunday, 25 October

Rain. High 60°, low 47°.

Pressure29.97 inHg
Wind15.4 mph NW
Humidity49%
Visibility—
Dew point37°

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 Calvin, 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 Calvin, 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.