Grinnell, IL
Unincorporated community in Johnson County, Illinois
Grinnell is a small unincorporated community in Johnson County, Illinois. It is 4.8 miles NW of Belknap, the nearest town. Its ZIP code is 62908.
Grinnell at a glance
- State
- Illinois
- County
- Johnson County
- ZIP code
- 62908
- Nearest town
- Belknap (4.8 mi)
- Time zone
- America/Chicago
- Coordinates
- 37.2792, -88.8722
Weather in Grinnell now
Loading the National Weather Service forecast…
Grinnell weather by the hour
Grinnell weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Grinnell.
This week in Grinnell
Sunrise, sunset and moon in Grinnell
What is the weather usually like in Grinnell?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 89°F average high
- Januarycoldest month · 26°F average low
- 49.4 inprecipitation per year · 1,255 mm
- 7.2 insnowfall per year · 18 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Grinnell: May and August to October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station GRAND CHAIN DAM 53, IL US (USC00113580), adjusted for the elevation of Grinnell.
Grinnell weather month by month
Sunrise and sunset in Grinnell through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:06 AM | 5:03 PM | 9 h 56 min |
| February | 6:42 AM | 5:36 PM | 10 h 53 min |
| March | 7:04 AM | 7:04 PM | 11 h 59 min |
| April | 6:19 AM | 7:31 PM | 13 h 12 min |
| May | 5:45 AM | 7:58 PM | 14 h 13 min |
| June | 5:33 AM | 8:19 PM | 14 h 46 min |
| July | 5:45 AM | 8:17 PM | 14 h 31 min |
| August | 6:10 AM | 7:49 PM | 13 h 38 min |
| September | 6:36 AM | 7:04 PM | 12 h 28 min |
| October | 7:02 AM | 6:20 PM | 11 h 17 min |
| November | 6:33 AM | 4:46 PM | 10 h 13 min |
| December | 7:00 AM | 4:40 PM | 9 h 39 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Grinnell?
Grinnell has a humid subtropical climate. The warmest month is July, with an average high of 89°F (32°C), and the coldest is January, with average lows of 26°F (-3°C).
It gets about 49.4 inches (1,255 mm) of precipitation a year. The wettest month is April and the driest is August. Snow is common: about 7 inches fall in an average year.
The best time to visit Grinnell is May and August to October. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Grinnell
The closest live webcam is Paducah › South-west: St Francis de Sales Catholic Church - Broadway United Methodist Church, 20.1 miles SE of Grinnell.
Webcams: Windy.com. Distances in a straight line from Grinnell.
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Map of Grinnell, IL
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Grinnell Street View
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Questions about Grinnell
Where is Grinnell, IL?
Grinnell is an unincorporated community in Johnson County, Illinois, 4.8 miles NW of Belknap.
What county is Grinnell in?
Grinnell is in Johnson County, Illinois.
What is the ZIP code of Grinnell, IL?
The ZIP code for Grinnell is 62908.
What is the nearest town to Grinnell?
Belknap, 4.8 miles away.
Are there webcams near Grinnell?
Yes. The closest is Paducah › South-west: St Francis de Sales Catholic Church - Broadway United Methodist Church, 20.1 miles away.
What is the hottest month in Grinnell?
July, with an average high of 89°F (32°C).
What is the coldest month in Grinnell?
January, with an average low of 26°F (-3°C).
How much does it rain in Grinnell?
About 49.4 inches (1,255 mm) a year; the wettest month is April.
Does it snow in Grinnell?
Yes, about 7 inches of snow fall in an average year.
When is the best time to visit Grinnell?
May and August to October, when temperatures are most pleasant and rainy days are fewer.
What climate does Grinnell have?
Humid subtropical (Köppen Cfa).
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