Weather in McHenry, IL
McHenry, Friday, 9 October, 18:16
Mostly clear. Feels like 64°. High 67°, low 51°.
Monthly outlook for McHenry, IL: average high 64.9°, average low 48°. That is 3.2° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (80.1°), the coolest 18 October (29.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 66.3° | 60.3° | +3.4° |
| 19 October – 28 October | 62.7° | 56.3° | +3.5° |
| 29 October – 7 November | at normal | 52.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (11 mi).
0
McHenry, Saturday, 10 October
Overcast. High 77°, low 58°.
0
McHenry, Sunday, 11 October
Clear. High 75°, low 57°.
0.02
McHenry, Monday, 12 October
Light rain. High 80°, low 62°.
0.02McHenry, Tuesday, 13 October
Light rain. High 73°, low 64°.
0.47McHenry, Wednesday, 14 October
Rain. High 64°, low 56°.
0.41McHenry, Thursday, 15 October
Rain. High 69°, low 54°.
0.01McHenry, Friday, 16 October
Light rain. High 62°, low 42°.
0McHenry, Saturday, 17 October
Overcast. High 46°, low 34°.
0McHenry, Sunday, 18 October
Mostly clear. High 48°, low 29°.
0McHenry, Monday, 19 October
Overcast. High 53°, low 37°.
0McHenry, Tuesday, 20 October
Clear. High 59°, low 40°.
0McHenry, Wednesday, 21 October
Clear. High 63°, low 43°.
0McHenry, Thursday, 22 October
Clear. High 64°, low 47°.
0McHenry, Friday, 23 October
Clear. High 65°, low 43°.
0McHenry, Saturday, 24 October
Clear. High 71°, low 51°.
0.1
McHenry, Sunday, 25 October
Climate normal for this date — 60-year average.
0.13
McHenry, Monday, 26 October
Climate normal for this date — 60-year average.
0.08McHenry, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05McHenry, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06McHenry, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09McHenry, Friday, 30 October
Climate normal for this date — 60-year average.
0.12McHenry, Saturday, 31 October
Climate normal for this date — 60-year average.
0.16McHenry, Sunday, 1 November
Climate normal for this date — 60-year average.
0.14McHenry, Monday, 2 November
Climate normal for this date — 60-year average.
0.06McHenry, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.1McHenry, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12McHenry, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09McHenry, Friday, 6 November
Climate normal for this date — 60-year average.
0.05McHenry, Saturday, 7 November
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 McHenry, 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 McHenry, 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
58°Weather in Annapolis, MD65°Weather in Atlanta, GA69°Weather in Augusta, ME50°Weather in Austin, TX89°Weather in Baton Rouge, LA85°Weather in Bismarck, ND76°Weather in Boise, ID84°Weather in Boston, MA60°Weather in Carson City, NV83°Weather in Charleston, WV66°Weather in Charlotte Amalie, VI81°Weather in Cheyenne, WY80°Weather in Columbia, SC71°Weather in Columbus, OH70°Weather in Concord, NH54°Weather in Denver, CO85°Weather in Des Moines, IA86°Weather in Dover, DE64°Weather in Frankfort, KY74°Weather in Harrisburg, PA61°Weather in Hartford, CT
58°Weather in Helena, MT80°Weather in Honolulu, HI84°Weather in Indianapolis, IN75°Weather in Jackson, MS85°Weather in Jefferson City, MO89°Weather in Juneau, AK45°Weather in Lansing, MI62°Weather in Lincoln, NE90°Weather in Little Rock, AR88°Weather in Madison, WI58°Weather in Montgomery, AL68°Weather in Montpelier, VT53°Weather in Nashville, TN80°Weather in Oklahoma City, OK88°Weather in Olympia, WA62°Weather in Phoenix, AZ101°Weather in Pierre, SD82°Weather in Providence, RI58°Weather in Raleigh, NC69°Weather in Richmond, VA66°Weather in Sacramento, CA89°Weather in Salem, OR60°Weather in Salt Lake City, UT81°Weather in San Juan, PR83°Weather in Santa Fe, NM72°Weather in Springfield, IL83°Weather in St. Paul, MN70°Weather in Tallahassee, FL72°Weather in Topeka, KS87°Weather in Trenton, NJ61°Weather in Washington, DC66°67°Weather in Elva, IL68°Weather in Eola, IL69°Weather in Fairdale, IL67°Weather in Flowerfield, IL68°Weather in Geneva Road, IL68°Weather in Glen Oak, IL68°Weather in Ingalton, IL68°Weather in Jewell Road, IL68°Weather in Lace, IL68°Weather in McGirr, IL67°Weather in New Lebanon, IL66°Weather in Ontarioville, IL67°Weather in Rollo, IL70°Weather in Shabbona Grove, IL69°Weather in Swift, IL68°Weather in Utopia, IL68°Weather in Warrenhurst, IL69°Weather in Wayne Center, IL68°Weather in Northfield Woods, IL66°