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As of 00:00 CDT

Weather in Grinnell, IL

70°Current weather

Grinnell, Sunday, 9 August, 00:00

Clear. Feels like 71°. High 92°, low 70°.

Pressure30.03 inHg
Wind5.3 mph S
Humidity92%
Visibility6.2 mi
Dew point69°

10-day forecast for Grinnell, IL: 68° to 97°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.

97°
Best day: Tuesday, August 11
89° · 1.25 in
Worst day: Friday, August 14

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1094° / 73°0Mostly clear
MorningClear77°feels 78°
AfternoonClear94°feels 100°
EveningClear81°feels 86°
OvernightClear75°feels 76°
94 °Mostly clear

Grinnell, Monday, 10 August

Mostly clear. High 94°, low 73°.

Pressure30.03 inHg
Wind11.9 mph SW
Humidity51%
Visibility6.2 mi
Dew point70°
Tue, 1197° / 75°0Mostly clear
MorningOvercast79°feels 79°
AfternoonClear97°feels 102°
EveningClear86°feels 92°
OvernightPartly cloudy78°feels 79°
97 °Mostly clear

Grinnell, Tuesday, 11 August

Mostly clear. High 97°, low 75°.

Pressure29.94 inHg
Wind13.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point70°
Wed, 1290° / 73°0.14Light rain
MorningOvercast76°feels 77°
AfternoonOvercast89°feels 97°
EveningOvercast76°feels 77°
OvernightClear81°feels 84°
90 °Light rain

Grinnell, Wednesday, 12 August

Light rain. High 90°, low 73°.

Pressure29.88 inHg
Wind4.9 mph W
Humidity64%
Visibility6.2 mi
Dew point72°
Thu, 1386° / 72°0.27Rain
MorningRain74°feels 75°
AfternoonRain76°feels 77°
EveningRain78°feels 78°
OvernightRain73°feels 74°
86 °Rain

Grinnell, Thursday, 13 August

Rain. High 86°, low 72°.

Pressure29.94 inHg
Wind13.2 mph E
Humidity93%
Visibility—
Dew point73°
Fri, 1489° / 70°1.25Heavy rain
MorningHeavy rain76°feels 80°
AfternoonHeavy rain87°feels 95°
EveningHeavy rain79°feels 83°
OvernightHeavy rain72°feels 73°
89 °Heavy rain

Grinnell, Friday, 14 August

Heavy rain. High 89°, low 70°.

Pressure29.97 inHg
Wind11.5 mph NE
Humidity64%
Visibility—
Dew point72°
Sat, 1578° / 68°0.15Light rain
MorningLight rain70°feels 71°
AfternoonLight rain75°feels 76°
EveningLight rain74°feels 76°
OvernightLight rain70°feels 71°
78 °Light rain

Grinnell, Saturday, 15 August

Light rain. High 78°, low 68°.

Pressure30.18 inHg
Wind10.5 mph E
Humidity84%
Visibility—
Dew point69°
Sun, 1693° / 69°0.04Light rain
MorningLight rain76°feels 79°
AfternoonLight rain91°feels 100°
EveningLight rain84°feels 94°
OvernightLight rain76°feels 78°
93 °Light rain

Grinnell, Sunday, 16 August

Light rain. High 93°, low 69°.

Pressure30.03 inHg
Wind8.6 mph W
Humidity54%
Visibility—
Dew point70°
Mon, 1789° / 73°0.06Light rain
MorningLight rain76°feels 80°
AfternoonLight rain83°feels 91°
EveningLight rain83°feels 92°
OvernightLight rain76°feels 77°
89 °Light rain

Grinnell, Monday, 17 August

Light rain. High 89°, low 73°.

Pressure30.03 inHg
Wind7.3 mph NE
Humidity75%
Visibility—
Dew point73°
Tue, 1891° / 72°0.15Light rain
MorningLight rain78°feels 82°
AfternoonLight rain89°feels 99°
EveningLight rain79°feels 84°
OvernightLight rain73°feels 74°
91 °Light rain

Grinnell, Tuesday, 18 August

Light rain. High 91°, low 72°.

Pressure29.97 inHg
Wind15.1 mph NW
Humidity60%
Visibility—
Dew point73°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in Grinnell, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.