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Grinnell, United States Snapshot 2026
Where is Grinnell?
Grinnell, United States
- Continent
- Americas
- Country
- United States
- City
- Grinnell
- Population
- 9.1K
- Elevation
- 309 m
- Coordinates
- 41.74°, -92.72°
Grinnell is a city in United States with a population of approximately 9.1K. Average temperatures range from -9°C (15°F) in January to 29°C (84°F) in July. The best time to visit is May, June, July, August, September. The city sits at an elevation of 309 m above sea level.
Time in Grinnell right now
Open full time & time zone page 16:31 31
Monday, June 15, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in Grinnell
Daylight in Grinnell today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 12m
Climate normals for Grinnell
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -9°C | -6°C / -15°C | 7days (41 mm) Good | 5.6h Fair | 75% Muggy | 2.5 Moderate | Poor | View Details |
| February | 2°C / -8°C | -3°C / -13°C | 6days (35 mm) Good | 7.4h Good | 69% Muggy | 3.7 Moderate | Poor | View Details |
| March | 10°C / 0°C | 6°C / -5°C | 10days (80 mm) Wet | 7.7h Good | 66% Muggy | 4.7 Moderate | Poor | View Details |
| April | 16°C / 5°C | 13°C / 1°C | 11days (96 mm) Wet | 8.8h Good | 63% Muggy | 5.6 High | Fair | View Details |
| May best | 22°C / 12°C | 21°C / 9°C | 13days (136 mm) Wet | 9.8h Good | 68% Muggy | 6.9 High | Excellent | View Details |
| June best | 28°C / 18°C | 30°C / 18°C | 10days (105 mm) Wet | 12.1h Excellent | 67% Muggy | 7.2 Very High | Excellent | View Details |
| July best | 29°C / 20°C | 32°C / 21°C | 10days (94 mm) Wet | 12h Excellent | 73% Muggy | 7.2 Very High | Excellent | View Details |
| August best | 28°C / 19°C | 30°C / 19°C | 8days (79 mm) Wet | 11.2h Excellent | 72% Muggy | 6.6 High | Excellent | View Details |
| September best | 26°C / 16°C | 26°C / 15°C | 8days (92 mm) Wet | 9.7h Good | 68% Muggy | 5.6 High | Excellent | View Details |
| October | 18°C / 8°C | 15°C / 5°C | 9days (107 mm) Wet | 7.6h Good | 64% Muggy | 4.1 Moderate | Good | View Details |
| November | 10°C / 1°C | 6°C / -4°C | 6days (49 mm) Good | 6.5h Fair | 68% Muggy | 2.7 Moderate | Poor | View Details |
| December | 3°C / -5°C | -1°C / -10°C | 6days (41 mm) Good | 5.7h Fair | 71% Muggy | 2.1 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: -1°C / -9°C . Feb: 2°C / -8°C . Mar: 10°C / 0°C . Apr: 16°C / 5°C . May: 22°C / 12°C . Jun: 28°C / 18°C . Jul: 29°C / 20°C . Aug: 28°C / 19°C . Sep: 26°C / 16°C . Oct: 18°C / 8°C . Nov: 10°C / 1°C . Dec: 3°C / -5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 41 mm. Feb: 35 mm. Mar: 80 mm. Apr: 96 mm. May: 136 mm. Jun: 105 mm. Jul: 94 mm. Aug: 79 mm. Sep: 92 mm. Oct: 107 mm. Nov: 49 mm. Dec: 41 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 75%. Feb: 69%. Mar: 66%. Apr: 63%. May: 68%. Jun: 67%. Jul: 73%. Aug: 72%. Sep: 68%. Oct: 64%. Nov: 68%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 24 km/h . Mar: 25 km/h . Apr: 26 km/h . May: 22 km/h . Jun: 20 km/h . Jul: 17 km/h . Aug: 18 km/h . Sep: 20 km/h . Oct: 23 km/h . Nov: 23 km/h . Dec: 23 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Grinnell has a population of approximately 9.1K.
The best months to visit Grinnell are May, June, July, August, September, when temperatures are pleasant and rainfall is lower.
Grinnell receives approximately 955mm of rainfall annually across 104 rainy days.
Grinnell is located in United States, in the Americas region.
Grinnell sits at an elevation of 309 m (1,014 ft) above sea level.