IL
Rock Island and Silvis have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Rock Island | Metric | Silvis |
|---|---|---|
| 192 days | Sunny daysclear or partly cloudy skies | 192 days |
| 38 in | Precipitationper year | 38 in |
| 120 days | Wet daysrain or snow per year | 120 days |
| 35 in | Snowfallper year | 34 in |
| 20 days | Hot daysabove 90 °F | 19 days |
| 125 days | Freezing nightsat or below 32 °F | 125 days |
| 70% | Humidityaverage relative | 70% |
| 51 °F | Average temperatureyear round | 51 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rock Island high | 31 | 36 | 49 | 62 | 73 | 82 | 85 | 83 | 77 | 64 | 49 | 36 |
| Silvis high | 31 | 36 | 48 | 62 | 73 | 82 | 85 | 83 | 77 | 64 | 49 | 36 |
| Rock Island low | 14 | 18 | 29 | 40 | 51 | 61 | 65 | 63 | 55 | 43 | 31 | 20 |
| Silvis low | 14 | 18 | 29 | 40 | 51 | 62 | 65 | 64 | 55 | 43 | 31 | 20 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rock Island | 1.8 | 1.9 | 2.8 | 4.2 | 4.7 | 4.7 | 3.6 | 3.5 | 3.4 | 2.7 | 2.4 | 2.1 |
| Silvis | 1.8 | 1.9 | 2.8 | 4.2 | 4.7 | 4.7 | 3.6 | 3.5 | 3.4 | 2.7 | 2.4 | 2.1 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rock Island | 13 | 12 | 14 | 14 | 15 | 17 | 20 | 21 | 20 | 18 | 15 | 13 |
| Silvis | 13 | 12 | 14 | 14 | 15 | 17 | 20 | 21 | 20 | 18 | 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.
Rock Island vs another city
- Rock Island vs Milan, IL
- Rock Island vs Moline, IL
- Rock Island vs Davenport, IA
- Rock Island vs Bettendorf, IA
- Rock Island vs East Moline, IL
- Rock Island vs New York, NY
- Rock Island vs Los Angeles, CA
- Rock Island vs Chicago, IL
- Rock Island vs Houston, TX
- Rock Island vs Phoenix, AZ
- Rock Island vs Philadelphia, PA
Silvis vs another city
- Silvis vs East Moline, IL
- Silvis vs Colona, IL
- Silvis vs Moline, IL
- Silvis vs Bettendorf, IA
- Silvis vs Milan, IL
- Silvis vs New York, NY
- Silvis vs Los Angeles, CA
- Silvis vs Chicago, IL
- Silvis vs Houston, TX
- Silvis vs Phoenix, AZ
- Silvis 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).