Weather in Rock Island, IL
Rock Island, Sunday, 9 August, 03:31
Overcast. Feels like 67°. High 92°, low 66°.
Monthly outlook for Rock Island, IL: average high 86°, average low 69.1°. That is 2.7° above the climate normal for August. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 22 August (96.2°), the coolest 15 August (61.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 82.6° | 81° | +0.9° |
| 19 August – 28 August | 91.6° | 81.2° | +5.8° |
| 29 August – 7 September | at normal | 79.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Davenport (6 mi).
0.01
Rock Island, Monday, 10 August
Light rain. High 90°, low 71°.
0.02Rock Island, Tuesday, 11 August
Light rain. High 91°, low 71°.
0.05Rock Island, Wednesday, 12 August
Light rain. High 85°, low 70°.
0.1Rock Island, Thursday, 13 August
Light rain. High 77°, low 63°.
1.17Rock Island, Friday, 14 August
Heavy rain. High 74°, low 62°.
0.04Rock Island, Saturday, 15 August
Light rain. High 72°, low 61°.
0.02Rock Island, Sunday, 16 August
Light rain. High 78°, low 67°.
0Rock Island, Monday, 17 August
Overcast. High 83°, low 66°.
0Rock Island, Tuesday, 18 August
Overcast. High 84°, low 66°.
0Rock Island, Wednesday, 19 August
Overcast. High 93°, low 73°.
0Rock Island, Thursday, 20 August
Overcast. High 92°, low 77°.
0
Rock Island, Friday, 21 August
Partly cloudy. High 88°, low 75°.
0
Rock Island, Saturday, 22 August
Clear. High 96°, low 70°.
0.01Rock Island, Sunday, 23 August
Light rain. High 93°, low 79°.
0.28Rock Island, Monday, 24 August
Rain. High 87°, low 69°.
0.12
Rock Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.19Rock Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Rock Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0.14Rock Island, Friday, 28 August
Climate normal for this date — 60-year average.
0.09Rock Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Rock Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09Rock Island, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Rock Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.08Rock Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Rock Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Rock Island, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Rock Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0.12Rock Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Rock Island, Monday, 7 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Rock Island, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Rock Island, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
69°Weather in Annapolis, MD75°Weather in Atlanta, GA71°Weather in Augusta, ME67°Weather in Austin, TX80°Weather in Baton Rouge, LA
76°Weather in Bismarck, ND64°Weather in Boise, ID70°Weather in Boston, MA72°Weather in Carson City, NV73°Weather in Charleston, WV73°Weather in Charlotte Amalie, VI81°Weather in Cheyenne, WY70°Weather in Columbia, SC74°Weather in Columbus, OH69°Weather in Concord, NH69°Weather in Denver, CO74°Weather in Des Moines, IA74°Weather in Dover, DE75°Weather in Frankfort, KY70°Weather in Harrisburg, PA71°Weather in Hartford, CT71°Weather in Helena, MT62°Weather in Honolulu, HI77°Weather in Indianapolis, IN72°Weather in Jackson, MS76°Weather in Jefferson City, MO76°Weather in Juneau, AK47°Weather in Lansing, MI59°Weather in Lincoln, NE77°Weather in Little Rock, AR74°Weather in Madison, WI63°Weather in Montgomery, AL76°Weather in Montpelier, VT63°Weather in Nashville, TN70°Weather in Oklahoma City, OK81°Weather in Olympia, WA56°Weather in Phoenix, AZ93°Weather in Pierre, SD74°Weather in Providence, RI73°Weather in Raleigh, NC74°Weather in Richmond, VA75°Weather in Sacramento, CA69°Weather in Salem, OR61°Weather in Salt Lake City, UT82°Weather in San Juan, PR82°Weather in Santa Fe, NM72°Weather in Springfield, IL73°Weather in St. Paul, MN68°Weather in Tallahassee, FL74°Weather in Topeka, KS76°Weather in Trenton, NJ72°Weather in Washington, DC74°64°Weather in Cayuga, IL64°Weather in Cazenovia, IL67°Weather in Cedar Park, IL75°Weather in Center Hill, IL58°Weather in Central, IL64°Weather in Chalfin Bridge, IL71°Weather in Chambersburg, IL73°Weather in Chapman, IL75°Weather in Charlotte, IL64°Weather in Chautauqua Park, IL70°Weather in Cheneyville, IL67°Weather in Chestervale, IL70°Weather in Chili, IL71°Weather in Chittyville, IL70°Weather in Clarence, IL65°Weather in Clarksburg, IL73°Weather in Clarmin, IL72°Weather in Claytonville, IL67°Weather in Cleburne, IL70°