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As of 18:45 CDT

Weather in Grinnell, IL

61°Current weather

Grinnell, Tuesday, 6 October, 18:45

Clear. Feels like 60°. High 79°, low 48°.

Pressure30.00 inHg
Wind0 mph N
Humidity72%
Visibility6.2 mi
Dew point52°
Wed, 0783° / 51°0Clear
83 °Clear

Grinnell, Wednesday, 7 October

Clear. High 83°, low 51°.

Pressure29.97 inHg
Wind5.8 mph SW
Humidity52%
Visibility0.8 mi
Dew point57°
Thu, 0881° / 56°0Clear
81 °Clear

Grinnell, Thursday, 8 October

Clear. High 81°, low 56°.

Pressure30.09 inHg
Wind5.3 mph NE
Humidity47%
Visibility6.2 mi
Dew point57°
Fri, 0981° / 56°0Clear
81 °Clear

Grinnell, Friday, 9 October

Clear. High 81°, low 56°.

Pressure30.18 inHg
Wind5.7 mph SE
Humidity47%
Visibility6.2 mi
Dew point55°
Sat, 1079° / 64°0.01Light rain
79 °Light rain

Grinnell, Saturday, 10 October

Light rain. High 79°, low 64°.

Pressure30.09 inHg
Wind6.8 mph SE
Humidity59%
Visibility6.2 mi
Dew point63°
Sun, 1171° / 61°1.64Rain
71 °Rain

Grinnell, Sunday, 11 October

Rain. High 71°, low 61°.

Pressure29.68 inHg
Wind19.4 mph NW
Humidity74%
Visibility—
Dew point60°
Mon, 1276° / 59°0Partly cloudy
76 °Partly cloudy

Grinnell, Monday, 12 October

Partly cloudy. High 76°, low 59°.

Pressure30.03 inHg
Wind6.7 mph N
Humidity58%
Visibility—
Dew point56°
Tue, 1382° / 60°0Clear
82 °Clear

Grinnell, Tuesday, 13 October

Clear. High 82°, low 60°.

Pressure30.06 inHg
Wind6.2 mph E
Humidity48%
Visibility—
Dew point56°
Wed, 1484° / 61°0Clear
84 °Clear

Grinnell, Wednesday, 14 October

Clear. High 84°, low 61°.

Pressure30.03 inHg
Wind9.4 mph SE
Humidity46%
Visibility—
Dew point57°
Thu, 1583° / 69°0Clear
83 °Clear

Grinnell, Thursday, 15 October

Clear. High 83°, low 69°.

Pressure30.00 inHg
Wind18.7 mph S
Humidity54%
Visibility—
Dew point61°
Fri, 1671° / 52°1.52Heavy rain
71 °Heavy rain

Grinnell, Friday, 16 October

Heavy rain. High 71°, low 52°.

Pressure30.15 inHg
Wind12.4 mph N
Humidity94%
Visibility—
Dew point52°
Sat, 1760° / 52°0.61Rain
60 °Rain

Grinnell, Saturday, 17 October

Rain. High 60°, low 52°.

Pressure30.09 inHg
Wind11.3 mph NE
Humidity95%
Visibility—
Dew point56°
Sun, 1855° / 44°0.98Rain
55 °Rain

Grinnell, Sunday, 18 October

Rain. High 55°, low 44°.

Pressure30.15 inHg
Wind8.2 mph NW
Humidity95%
Visibility—
Dew point47°
Mon, 1961° / 38°0Clear
61 °Clear

Grinnell, Monday, 19 October

Clear. High 61°, low 38°.

Pressure30.21 inHg
Wind9.4 mph N
Humidity43%
Visibility—
Dew point34°
Tue, 2066° / 44°0Clear
66 °Clear

Grinnell, Tuesday, 20 October

Clear. High 66°, low 44°.

Pressure30.09 inHg
Wind4.6 mph SW
Humidity41%
Visibility—
Dew point38°
Wed, 2165° / 45°0Clear
65 °Clear

Grinnell, Wednesday, 21 October

Clear. High 65°, low 45°.

Pressure30.12 inHg
Wind6.7 mph N
Humidity51%
Visibility—
Dew point42°

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 Grinnell, 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 Grinnell, 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.