The year at a glance
Averages from 30 years of climate history, 1991-2020
| Grinnell | Metric | Newton |
|---|---|---|
| 199 days | Sunny daysclear or partly cloudy skies | 200 days |
| 39 in | Precipitationper year | 39 in |
| 117 days | Wet daysrain or snow per year | 116 days |
| 31 in | Snowfallper year | 29 in |
| 11 days | Hot daysabove 90 °F | 21 days |
| 153 days | Freezing nightsat or below 32 °F | 143 days |
| 70% | Humidityaverage relative | 70% |
| 48 °F | Average temperatureyear round | 49 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grinnell high | 28 | 33 | 46 | 59 | 70 | 80 | 83 | 81 | 75 | 62 | 47 | 34 |
| Newton high | 28 | 33 | 46 | 60 | 71 | 81 | 85 | 83 | 76 | 62 | 47 | 34 |
| Grinnell low | 10 | 14 | 25 | 35 | 47 | 58 | 62 | 59 | 50 | 38 | 26 | 16 |
| Newton low | 10 | 14 | 26 | 37 | 50 | 60 | 64 | 61 | 52 | 40 | 27 | 17 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grinnell | 1.3 | 1.6 | 2.7 | 4.5 | 5.3 | 5.2 | 3.9 | 3.9 | 3.9 | 2.9 | 2.2 | 1.7 |
| Newton | 1.3 | 1.6 | 2.7 | 4.4 | 5.4 | 5.2 | 3.9 | 4.0 | 3.8 | 2.9 | 2.2 | 1.6 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grinnell | 13 | 13 | 16 | 15 | 16 | 16 | 21 | 21 | 21 | 18 | 16 | 14 |
| Newton | 14 | 13 | 16 | 15 | 16 | 16 | 21 | 21 | 21 | 19 | 16 | 14 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Grinnell vs another city
- Grinnell vs Marshalltown, IA
- Grinnell vs Pella, IA
- Grinnell vs Oskaloosa, IA
- Grinnell vs Knoxville, IA
- Grinnell vs Bondurant, IA
- Grinnell vs New York, NY
- Grinnell vs Los Angeles, CA
- Grinnell vs Chicago, IL
- Grinnell vs Houston, TX
- Grinnell vs Phoenix, AZ
- Grinnell vs Philadelphia, PA
Newton vs another city
- Newton vs Pella, IA
- Newton vs Bondurant, IA
- Newton vs Altoona, IA
- Newton vs Marshalltown, IA
- Newton vs Pleasant Hill, IA
- Newton vs New York, NY
- Newton vs Los Angeles, CA
- Newton vs Chicago, IL
- Newton vs Houston, TX
- Newton vs Phoenix, AZ
- Newton vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).