Climate Grinnell - Iowa
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 29 | 34 | 46 | 60 | 70 | 80 |
| Average low in ºF Av. low Lo | 10 | 13 | 24 | 35 | 46 | 57 |
| Av. precipitation in inch Av. precip. Pre. | 0.99 | 1.41 | 2.34 | 3.59 | 4.47 | 4.84 |
| Av. snowfall in inch Snowfall Sn | 8 | 8 | 4 | 1 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 84 | 82 | 75 | 62 | 47 | 32 |
| Average low in ºF Av. low Lo | 61 | 59 | 49 | 37 | 26 | 14 |
| Av. precipitation in inch Av. precip. Pre. | 4.34 | 4.58 | 3.47 | 2.81 | 2.28 | 1.47 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 1 | 8 |
What is the average weather in Grinnell, Iowa?
Grinnell experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm and fairly wet, with the most precipitation arriving in summer. Winters are cold and snowy, bringing significant snowfall, while winter is also the driest season overall.
Grinnell Climate Graph - Iowa Climate Chart
Daily normals Grinnell - Iowa - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 29.4 | 12.3 | 0.04 | 0.04 | 0.20 | 0.20 |
| 2 Jan | 29.2 | 12.1 | 0.08 | 0.08 | 0.50 | 0.50 |
| 3 Jan | 29.0 | 11.8 | 0.12 | 0.12 | 0.80 | 0.80 |
| 4 Jan | 28.9 | 11.6 | 0.15 | 0.15 | 1.00 | 1.00 |
| 5 Jan | 28.7 | 11.4 | 0.19 | 0.19 | 1.30 | 1.30 |
| 6 Jan | 28.6 | 11.2 | 0.22 | 0.22 | 1.50 | 1.50 |
| 7 Jan | 28.4 | 11.1 | 0.26 | 0.26 | 1.80 | 1.80 |
| 8 Jan | 28.3 | 10.9 | 0.29 | 0.29 | 2.10 | 2.10 |
| 9 Jan | 28.2 | 10.7 | 0.33 | 0.33 | 2.40 | 2.40 |
| 10 Jan | 28.1 | 10.5 | 0.36 | 0.36 | 2.70 | 2.70 |
| 11 Jan | 28.0 | 10.4 | 0.39 | 0.39 | 2.90 | 2.90 |
| 12 Jan | 28.0 | 10.2 | 0.43 | 0.43 | 3.20 | 3.20 |
| 13 Jan | 27.9 | 10.1 | 0.46 | 0.46 | 3.50 | 3.50 |
| 14 Jan | 27.9 | 10.0 | 0.49 | 0.49 | 3.90 | 3.90 |
| 15 Jan | 27.8 | 9.8 | 0.52 | 0.52 | 4.10 | 4.10 |
| 16 Jan | 27.8 | 9.7 | 0.56 | 0.56 | 4.40 | 4.40 |
| 17 Jan | 27.8 | 9.6 | 0.59 | 0.59 | 4.70 | 4.70 |
| 18 Jan | 27.8 | 9.6 | 0.62 | 0.62 | 5.00 | 5.00 |
| 19 Jan | 27.8 | 9.5 | 0.66 | 0.66 | 5.30 | 5.30 |
| 20 Jan | 27.9 | 9.4 | 0.70 | 0.70 | 5.60 | 5.60 |
| 21 Jan | 27.9 | 9.4 | 0.73 | 0.73 | 5.90 | 5.90 |
| 22 Jan | 27.9 | 9.4 | 0.76 | 0.76 | 6.20 | 6.20 |
| 23 Jan | 28.0 | 9.3 | 0.80 | 0.80 | 6.50 | 6.50 |
| 24 Jan | 28.1 | 9.3 | 0.83 | 0.83 | 6.80 | 6.80 |
| 25 Jan | 28.2 | 9.4 | 0.87 | 0.87 | 7.10 | 7.10 |
| 26 Jan | 28.3 | 9.4 | 0.91 | 0.91 | 7.40 | 7.40 |
| 27 Jan | 28.4 | 9.4 | 0.94 | 0.94 | 7.70 | 7.70 |
| 28 Jan | 28.5 | 9.5 | 0.98 | 0.98 | 8.00 | 8.00 |
| 29 Jan | 28.6 | 9.6 | 1.02 | 1.02 | 8.40 | 8.40 |
| 30 Jan | 28.8 | 9.7 | 1.06 | 1.06 | 8.70 | 8.70 |
| 31 Jan | 29.0 | 9.8 | 1.10 | 1.10 | 9.00 | 9.00 |
Weather history Grinnell - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 91.9 | 69.1 | 0.00 | - | - |
| 02 Sep | 93.9 | 69.1 | 0.00 | - | - |
| 03 Sep | 95.0 | 70.0 | 0.00 | - | - |
| 04 Sep | 95.0 | 71.1 | 0.00 | - | - |
| 05 Sep | 93.0 | 69.1 | 0.00 | - | - |
| 06 Sep | 90.0 | 68.0 | 0.00 | - | - |
| 07 Sep | 80.1 | 66.0 | 0.04 | - | - |
| 08 Sep | 81.0 | 66.0 | 0.01 | - | - |
| 09 Sep | - | - | - | - | - |
| 10 Sep | - | - | - | - | - |
| 11 Sep | - | - | - | - | - |
| 12 Sep | - | - | - | - | - |
| 13 Sep | - | - | - | - | - |
| 14 Sep | - | - | - | - | - |
| 15 Sep | - | - | - | - | - |
| 16 Sep | - | - | - | - | - |
| 17 Sep | - | - | - | - | - |
| 18 Sep | - | - | - | - | - |
| 19 Sep | - | - | - | - | - |
| 20 Sep | - | - | - | - | - |
| 21 Sep | - | - | - | - | - |
| 22 Sep | - | - | - | - | - |
| 23 Sep | - | - | - | - | - |
| 24 Sep | - | - | - | - | - |
| 25 Sep | - | - | - | - | - |
| 26 Sep | - | - | - | - | - |
| 27 Sep | - | - | - | - | - |
| 28 Sep | - | - | - | - | - |
| 29 Sep | - | - | - | - | - |
| 30 Sep | - | - | - | - | - |
Past weather Grinnell
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 90.0 ºF | 29 ºF | |
| Average low temperature Av. low temp. | 68.6 ºF | 10 ºF | |
| Total precipitation Total precip. | 0.05 inch | 0.99 inch | |
| Total snowfall Total snowfall | - inch | 8 inch | |
| Highest max temperature Highest max temp. | 95.0 ºF | - | |
| Lowest max temperature Lowest max temp. | 80.1 ºF | - | |
| Highest min temperature Highest min temp. | 71.1 ºF | - | |
| Lowest min temperature Lowest min temp. | 66.0 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Grinnell - Iowa
| Country | United States | |
|---|---|---|
| State | Iowa | |
| County | Poweshiek | |
| City | Grinnell | |
| Zip Code | 50112 | |
| Longitude | -92.74 dec. degr. | |
| Latitude | 41.71 dec. degr. | |
| Altitude - Elevation | 1001ft | |
| ICAO | - | |
| IATA | - |
Date and Time Grinnell - Iowa
| Local Time | 11:48 PM | |
|---|---|---|
| Sunrise | 06:45 AM | |
| Sunset | 07:30 PM | |
| Day/Night | Night | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Grinnell - Iowa
USGS National Map — Open interactive map
Grinnell weather averages
| Annual high temperature | 58ºF |
| Annual low temperature | 36ºF |
| Average annual precip. | 36.59 inch |
| Av. annual snowfall | 30 inch |
Station Data
Monthly averages Grinnell
Longitude: -92.736, Latitude: 41.7099
Average weather Grinnell, IA - 50112
Monthly: 1991-2020 normals
History: 2007-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...