Climate Rock Island - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 32 | 37 | 49 | 62 | 73 | 82 |
| Average low in ºF Av. low Lo | 16 | 21 | 31 | 43 | 54 | 64 |
| Av. precipitation in inch Av. precip. Pre. | 1.35 | 1.52 | 2.65 | 3.44 | 4.57 | 5.00 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 85 | 83 | 76 | 64 | 49 | 35 |
| Average low in ºF Av. low Lo | 68 | 66 | 58 | 45 | 34 | 21 |
| Av. precipitation in inch Av. precip. Pre. | 4.06 | 4.14 | 2.99 | 2.95 | 2.46 | 1.93 |
What is the average weather in Rock Island, Illinois?
Rock Island experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm, while winters are cold. The area is fairly wet overall, with precipitation spread relatively evenly throughout the year, though summer tends to be the wettest season.
Rock Island Climate Graph - Illinois Climate Chart
Daily normals Rock Island - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 31.6 | 15.2 | 0.05 | 0.05 | 0.00 | 0.00 |
| 2 Jan | 31.4 | 15.0 | 0.10 | 0.10 | 0.00 | 0.00 |
| 3 Jan | 31.3 | 14.8 | 0.16 | 0.16 | 0.00 | 0.00 |
| 4 Jan | 31.1 | 14.6 | 0.21 | 0.21 | 0.00 | 0.00 |
| 5 Jan | 31.0 | 14.3 | 0.26 | 0.26 | 0.00 | 0.00 |
| 6 Jan | 30.9 | 14.1 | 0.31 | 0.31 | 0.00 | 0.00 |
| 7 Jan | 30.8 | 14.0 | 0.35 | 0.35 | 0.00 | 0.00 |
| 8 Jan | 30.7 | 13.8 | 0.40 | 0.40 | 0.00 | 0.00 |
| 9 Jan | 30.7 | 13.6 | 0.45 | 0.45 | 0.00 | 0.00 |
| 10 Jan | 30.6 | 13.4 | 0.50 | 0.50 | 0.00 | 0.00 |
| 11 Jan | 30.6 | 13.3 | 0.55 | 0.55 | 0.00 | 0.00 |
| 12 Jan | 30.5 | 13.2 | 0.59 | 0.59 | 0.00 | 0.00 |
| 13 Jan | 30.5 | 13.0 | 0.64 | 0.64 | 0.00 | 0.00 |
| 14 Jan | 30.5 | 12.9 | 0.68 | 0.68 | 0.00 | 0.00 |
| 15 Jan | 30.5 | 12.9 | 0.73 | 0.73 | 0.00 | 0.00 |
| 16 Jan | 30.5 | 12.8 | 0.78 | 0.78 | 0.00 | 0.00 |
| 17 Jan | 30.5 | 12.7 | 0.82 | 0.82 | 0.00 | 0.00 |
| 18 Jan | 30.6 | 12.7 | 0.87 | 0.87 | 0.00 | 0.00 |
| 19 Jan | 30.6 | 12.7 | 0.92 | 0.92 | 0.00 | 0.00 |
| 20 Jan | 30.7 | 12.7 | 0.97 | 0.97 | 0.00 | 0.00 |
| 21 Jan | 30.8 | 12.7 | 1.01 | 1.01 | 0.00 | 0.00 |
| 22 Jan | 30.9 | 12.7 | 1.06 | 1.06 | 0.00 | 0.00 |
| 23 Jan | 31.0 | 12.7 | 1.11 | 1.11 | 0.00 | 0.00 |
| 24 Jan | 31.1 | 12.8 | 1.16 | 1.16 | 0.00 | 0.00 |
| 25 Jan | 31.2 | 12.9 | 1.20 | 1.20 | 0.00 | 0.00 |
| 26 Jan | 31.3 | 13.0 | 1.25 | 1.25 | 0.00 | 0.00 |
| 27 Jan | 31.5 | 13.1 | 1.30 | 1.30 | 0.00 | 0.00 |
| 28 Jan | 31.6 | 13.2 | 1.34 | 1.34 | 0.00 | 0.00 |
| 29 Jan | 31.8 | 13.4 | 1.39 | 1.39 | 0.00 | 0.00 |
| 30 Jan | 32.0 | 13.5 | 1.44 | 1.44 | 0.00 | 0.00 |
| 31 Jan | 32.2 | 13.7 | 1.49 | 1.49 | 0.00 | 0.00 |
Weather history Rock Island - August 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Aug | 78.1 | 66.9 | 0.50 | 0.00 | 0.0 |
| 02 Aug | 80.1 | 64.9 | 0.00 | 0.00 | 0.0 |
| 03 Aug | 86.0 | 66.0 | 0.00 | 0.00 | 0.0 |
| 04 Aug | 86.0 | 70.0 | 0.00 | 0.00 | 0.0 |
| 05 Aug | 75.9 | 55.9 | 0.35 | 0.00 | 0.0 |
| 06 Aug | 82.0 | 69.1 | 0.00 | 0.00 | 0.0 |
| 07 Aug | 87.1 | 70.0 | 0.00 | 0.00 | 0.0 |
| 08 Aug | 84.0 | 69.1 | 0.00 | 0.00 | 0.0 |
| 09 Aug | 93.9 | 70.0 | 0.01 | 0.00 | 0.0 |
| 10 Aug | 90.0 | 70.0 | 0.00 | - | - |
| 11 Aug | - | - | - | - | - |
| 12 Aug | - | - | - | - | - |
| 13 Aug | - | - | - | - | - |
| 14 Aug | - | - | - | - | - |
| 15 Aug | - | - | - | - | - |
| 16 Aug | - | - | - | - | - |
| 17 Aug | - | - | - | - | - |
| 18 Aug | - | - | - | - | - |
| 19 Aug | - | - | - | - | - |
| 20 Aug | - | - | - | - | - |
| 21 Aug | - | - | - | - | - |
| 22 Aug | - | - | - | - | - |
| 23 Aug | - | - | - | - | - |
| 24 Aug | - | - | - | - | - |
| 25 Aug | - | - | - | - | - |
| 26 Aug | - | - | - | - | - |
| 27 Aug | - | - | - | - | - |
| 28 Aug | - | - | - | - | - |
| 29 Aug | - | - | - | - | - |
| 30 Aug | - | - | - | - | - |
| 31 Aug | - | - | - | - | - |
Past weather Rock Island
| Aug 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 84.3 ºF | 32 ºF | |
| Average low temperature Av. low temp. | 67.2 ºF | 16 ºF | |
| Total precipitation Total precip. | 0.86 inch | 1.35 inch | |
| Total snowfall Total snowfall | 0.00 inch | 0 inch | |
| Highest max temperature Highest max temp. | 93.9 ºF | - | |
| Lowest max temperature Lowest max temp. | 75.9 ºF | - | |
| Highest min temperature Highest min temp. | 70.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 55.9 ºF | - | |
Past weather August 2026 incomplete - Missing data
Geo Rock Island - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Rock Island | |
| City | Rock Island | |
| Zip Code | 61201 | |
| Longitude | -90.58 dec. degr. | |
| Latitude | 41.51 dec. degr. | |
| Altitude - Elevation | 561ft | |
| ICAO | - | |
| IATA | - |
Date and Time Rock Island - Illinois
| Local Time | 10:59 PM | |
|---|---|---|
| Sunrise | 06:08 AM | |
| Sunset | 08:06 PM | |
| Day/Night | Night | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Rock Island - Illinois
USGS National Map — Open interactive map
Rock Island weather averages
| Annual high temperature | 60ºF |
| Annual low temperature | 43ºF |
| Average annual precip. | 37.06 inch |
Station Data
Monthly averages Rock Island
Longitude: -90.5788, Latitude: 41.5095
Average weather Rock Island, IL - 61201
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, ...