Grinnell, Iowa Climate
United States
Pop. 9,141 Elev. 309 m / 1,014 ft
TZ: America/Chicago (UTC-5) ·
Grinnell is largely arid, with warm summers peaking at 85°F (29°C) in July and cold winters around 13°F (-11°C) in January. Humidity pushes the summer feels-like temperature to 96°F (36°C), while wind chill can drive winter lows to 4°F (-16°C). Precipitation occurs on roughly 41 days per year (32.3 in / 820 mm total), with snow on 4 days and 31 in (775 mm) of annual accumulation. The city averages 132 sunny days per year and around 31 thunderstorm days. Nearby lake water reaches 80°F (27°C) in summer.
| Temperature | 85°F (29°C) high | 13°F (-10°C) low |
| Feels like | 96°F (36°C) high | 4°F (-16°C) low |
| Rain | 41 days | 32.3 in (820 mm) /yr |
| Snow | 4 days | 30.5 in (775 mm) /yr |
| Sky | 132 sunny | 31 stormy |
| Wind | 2.6 mph (1.2 m/s) avg |
Looking for a place with a climate like Grinnell? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: May, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
45
Jan 58
Feb 47
Mar 64
Apr 54
May 51
Jun 59
Jul 49
Aug 47
Sep 45
Oct 53
Nov 69
Dec Humidity (%)
61
Jan 65
Feb 57
Mar 58
Apr 57
May 65
Jun 79
Jul 76
Aug 65
Sep 63
Oct 68
Nov 78
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 59 mi Waterloo Regional Airport (ALO)
Ski resort 43 mi
National park 118 mi Effigy Mounds National Monument
Hospital 1 mi Grinnell Regional Medical Center
Hiking trail 38 mi ADT - Iowa - K - Seg 3
Interested in Grinnell?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F 0°C | 13°F -10°C | 0.3 in 7 mm | 2.2 in57 mm | 13 |
| February | 33°F 0°C | 16°F -9°C | 0.0 in 0 mm | 5.1 in129 mm | 8 |
| March | 60°F 15°C | 35°F 1°C | 3.4 in 85 mm | 5.7 in144 mm | 14 |
| April | 64°F 18°C | 43°F 6°C | 4.7 in 118 mm | — | 6 |
| May | 72°F 22°C | 52°F 11°C | 2.1 in 54 mm | — | 11 |
| June | 84°F 29°C | 65°F 18°C | 4.6 in 116 mm | — | 12 |
| July | 85°F 29°C | 68°F 20°C | 9.1 in 231 mm | — | 10 |
| August | 81°F 27°C | 63°F 17°C | 2.0 in 51 mm | — | 13 |
| September | 80°F 27°C | 58°F 14°C | 2.5 in 64 mm | — | 14 |
| October | 69°F 20°C | 49°F 10°C | 2.3 in 59 mm | — | 16 |
| November | 51°F 10°C | 34°F 1°C | 0.8 in 21 mm | 10.1 in256 mm | 10 |
| December | 33°F 1°C | 16°F -9°C | 0.4 in 11 mm | 7.5 in190 mm | 5 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 8 | 0 |
| March | 14 | 4 |
| April | 6 | 3 |
| May | 11 | 2 |
| June | 12 | 5 |
| July | 10 | 9 |
| August | 13 | 1 |
| September | 14 | 3 |
| October | 16 | 3 |
| November | 10 | 1 |
| December | 5 | 0 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 41°F 5°C |
| April | 53°F 12°C |
| May | 62°F 17°C |
| June | 74°F 23°C |
| July | 80°F 27°C |
| August | 76°F 24°C |
| September | 70°F 21°C |
| October | 59°F 15°C |
| November | 43°F 6°C |
| December | 32°F 0°C |