Princeton and Rock Falls have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Princeton | Metric | Rock Falls |
|---|---|---|
| 188 days | Sunny daysclear or partly cloudy skies | 188 days |
| 39 in | Precipitationper year | 38 in |
| 122 days | Wet daysrain or snow per year | 121 days |
| 29 in | Snowfallper year | 29 in |
| 18 days | Hot daysabove 90 °F | 13 days |
| 129 days | Freezing nightsat or below 32 °F | 137 days |
| 70% | Humidityaverage relative | 71% |
| 50 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Princeton high | 30 | 35 | 48 | 62 | 73 | 82 | 85 | 82 | 76 | 63 | 48 | 35 |
| Rock Falls high | 29 | 34 | 46 | 60 | 71 | 80 | 83 | 81 | 75 | 63 | 47 | 35 |
| Princeton low | 14 | 18 | 28 | 38 | 50 | 60 | 63 | 61 | 53 | 42 | 30 | 20 |
| Rock Falls low | 13 | 17 | 28 | 38 | 50 | 60 | 64 | 61 | 53 | 41 | 30 | 19 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Princeton | 2.0 | 2.0 | 2.7 | 4.4 | 4.9 | 4.5 | 3.9 | 3.4 | 3.3 | 3.0 | 2.5 | 2.2 |
| Rock Falls | 1.9 | 1.9 | 2.6 | 4.3 | 4.7 | 4.5 | 3.7 | 3.3 | 3.4 | 2.9 | 2.5 | 2.2 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Princeton | 12 | 12 | 14 | 14 | 15 | 16 | 20 | 21 | 20 | 17 | 15 | 12 |
| Rock Falls | 13 | 12 | 14 | 13 | 15 | 16 | 20 | 21 | 20 | 17 | 15 | 13 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Princeton vs another city
- Princeton vs Spring Valley, IL
- Princeton vs Peru, IL
- Princeton vs LaSalle, IL
- Princeton vs Mendota, IL
- Princeton vs Kewanee, IL
- Princeton vs New York, NY
- Princeton vs Los Angeles, CA
- Princeton vs Chicago, IL
- Princeton vs Houston, TX
- Princeton vs Phoenix, AZ
- Princeton vs Philadelphia, PA
Rock Falls vs another city
- Rock Falls vs Sterling, IL
- Rock Falls vs Dixon, IL
- Rock Falls vs Clinton, IA
- Rock Falls vs Geneseo, IL
- Rock Falls vs Rochelle, IL
- Rock Falls vs New York, NY
- Rock Falls vs Los Angeles, CA
- Rock Falls vs Chicago, IL
- Rock Falls vs Houston, TX
- Rock Falls vs Phoenix, AZ
- Rock Falls 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).