Weather in Rock Grove, IL
Rock Grove, Saturday, 8 August, 21:37
Clear. Feels like 67°. High 81°, low 66°.
Monthly outlook for Rock Grove, IL: average high 76.7°, average low 60°. That is 1.2° below the climate normal for August. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 10 August (84.6°), the coolest 20 August (51°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 78.5° | 78.9° | -0.2° |
| 18 August – 27 August | 73.7° | 78.8° | -2.8° |
| 28 August – 6 September | at normal | 77.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Monroe (12 mi).
0.55
Rock Grove, Sunday, 9 August
Rain. High 83°, low 62°.
0.47Rock Grove, Monday, 10 August
Heavy rain. High 85°, low 69°.
0.27Rock Grove, Tuesday, 11 August
Heavy rain. High 85°, low 69°.
0
Rock Grove, Wednesday, 12 August
Overcast. High 80°, low 66°.
0Rock Grove, Thursday, 13 August
Overcast. High 70°, low 57°.
0
Rock Grove, Friday, 14 August
Clear. High 77°, low 55°.
0Rock Grove, Saturday, 15 August
Overcast. High 72°, low 58°.
0Rock Grove, Sunday, 16 August
Overcast. High 73°, low 56°.
0Rock Grove, Monday, 17 August
Clear. High 80°, low 61°.
0Rock Grove, Tuesday, 18 August
Light rain. High 83°, low 65°.
0.02Rock Grove, Wednesday, 19 August
Light rain. High 72°, low 57°.
0Rock Grove, Thursday, 20 August
Overcast. High 66°, low 51°.
0Rock Grove, Friday, 21 August
Clear. High 74°, low 52°.
0.15Rock Grove, Saturday, 22 August
Rain. High 70°, low 53°.
0Rock Grove, Sunday, 23 August
Clear. High 76°, low 63°.
0.09
Rock Grove, Monday, 24 August
Climate normal for this date — 60-year average.
0.1Rock Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17
Rock Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Rock Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Rock Grove, Friday, 28 August
Climate normal for this date — 60-year average.
0.15Rock Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Rock Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06
Rock Grove, Monday, 31 August
Climate normal for this date — 60-year average.
0.1Rock Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06Rock Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Rock Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Rock Grove, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Rock Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
0.09Rock Grove, Sunday, 6 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 Grove, 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 Grove, 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
71°Weather in Annapolis, MD79°Weather in Atlanta, GA80°Weather in Augusta, ME72°Weather in Austin, TX91°Weather in Baton Rouge, LA
82°Weather in Bismarck, ND79°Weather in Boise, ID95°Weather in Boston, MA77°Weather in Carson City, NV95°Weather in Charleston, WV78°Weather in Charlotte Amalie, VI82°Weather in Cheyenne, WY90°Weather in Columbia, SC81°Weather in Columbus, OH77°Weather in Concord, NH75°Weather in Denver, CO88°Weather in Des Moines, IA76°Weather in Dover, DE78°Weather in Frankfort, KY80°Weather in Harrisburg, PA77°Weather in Hartford, CT73°Weather in Helena, MT87°Weather in Honolulu, HI84°Weather in Indianapolis, IN78°Weather in Jackson, MS84°Weather in Jefferson City, MO83°Weather in Juneau, AK50°Weather in Lansing, MI73°Weather in Lincoln, NE79°Weather in Little Rock, AR81°Weather in Madison, WI70°Weather in Montgomery, AL82°Weather in Montpelier, VT65°Weather in Nashville, TN75°Weather in Oklahoma City, OK96°Weather in Olympia, WA78°Weather in Phoenix, AZ100°Weather in Pierre, SD86°Weather in Providence, RI77°Weather in Raleigh, NC79°Weather in Richmond, VA82°Weather in Sacramento, CA96°Weather in Salem, OR86°Weather in Salt Lake City, UT97°Weather in San Juan, PR84°Weather in Santa Fe, NM81°Weather in Springfield, IL80°Weather in St. Paul, MN75°Weather in Tallahassee, FL77°Weather in Topeka, KS83°Weather in Trenton, NJ77°Weather in Washington, DC79°70°Weather in Virgil, IL68°Weather in West Dundee, IL69°Weather in Bensenville, IL73°Weather in Bloomingdale, IL71°Weather in Itasca, IL72°Weather in Lisle, IL71°Weather in Lombard, IL72°Weather in Hinsdale, IL73°Weather in Downers Grove, IL72°Weather in Glen Ellyn, IL72°Weather in Glendale Heights, IL72°Weather in Roselle, IL72°Weather in Oak Brook, IL73°Weather in Willowbrook, IL73°Weather in Winfield, IL71°Weather in Woodridge, IL72°Weather in Villa Park, IL73°Weather in Wayne, IL70°Weather in Westmont, IL72°