Grinnell, IA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
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 · 83°F average high
- Januarycoldest month · 10°F average low
- 38.2 inprecipitation per year · 970 mm
- 31.0 insnowfall per year · 79 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Grinnell: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station GRINNELL 3 SW, IA US (USC00133473), adjusted for the elevation of Grinnell.
Grinnell weather month by month
Sunrise and sunset in Grinnell through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:33 AM | 5:06 PM | 9 h 33 min |
| February | 7:04 AM | 5:45 PM | 10 h 41 min |
| March | 7:20 AM | 7:18 PM | 11 h 58 min |
| April | 6:28 AM | 7:53 PM | 13 h 24 min |
| May | 5:49 AM | 8:25 PM | 14 h 36 min |
| June | 5:34 AM | 8:48 PM | 15 h 14 min |
| July | 5:48 AM | 8:45 PM | 14 h 57 min |
| August | 6:18 AM | 8:12 PM | 13 h 54 min |
| September | 6:50 AM | 7:21 PM | 12 h 31 min |
| October | 7:22 AM | 6:31 PM | 11 h 9 min |
| November | 6:58 AM | 4:52 PM | 9 h 53 min |
| December | 7:29 AM | 4:42 PM | 9 h 13 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Grinnell?
Grinnell has a hot-summer humid continental climate. The warmest month is July, with an average high of 83°F (28°C), and the coldest is January, with average lows of 10°F (-12°C).
It gets about 38.2 inches (970 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 31 inches fall in an average year.
The best time to visit Grinnell is June to September. At 1,014 ft of elevation, nights are mild most of the year. 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.
More about Grinnell
Weather in towns near Grinnell
Questions about the weather in Grinnell
What is the hottest month in Grinnell?
July, with an average high of 83°F (28°C).
What is the coldest month in Grinnell?
January, with an average low of 10°F (-12°C).
How much does it rain in Grinnell?
About 38.2 inches (970 mm) a year; the wettest month is June.
Does it snow in Grinnell?
Yes, about 31 inches of snow fall in an average year.
When is the best time to visit Grinnell?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Grinnell have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Grinnell in November?
Highs average 46°F and lows 26°F, with about 1.9 inches of precipitation.
What time is sunrise in Grinnell?
Around 6:58 AM in mid-November, and sunset around 4:52 PM. Today’s exact times are shown above.
Where does this Grinnell weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Grinnell.
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