Weather in Piasa, IL
Piasa, Saturday, 8 August, 21:30
Clear. Feels like 87°. High 89°, low 70°.
Monthly outlook for Piasa, IL: average high 83°, average low 66.8°. That is 0.7° below the climate normal for August. Precipitation is expected on 10 days (about 3.5 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 11 August (97.4°), the coolest 21 August (54.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 85.2° | 84.2° | +0.5° |
| 18 August – 27 August | 79.5° | 84.5° | -2.8° |
| 28 August – 6 September | at normal | 82.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
0
Piasa, Sunday, 9 August
Overcast. High 95°, low 72°.
0.05
Piasa, Monday, 10 August
Light rain. High 97°, low 74°.
0.1Piasa, Tuesday, 11 August
Rain. High 97°, low 72°.
0.13Piasa, Wednesday, 12 August
Light rain. High 85°, low 73°.
1.76Piasa, Thursday, 13 August
Heavy rain. High 82°, low 65°.
0.54Piasa, Friday, 14 August
Rain. High 75°, low 66°.
0.26Piasa, Saturday, 15 August
Rain. High 74°, low 67°.
0.24Piasa, Sunday, 16 August
Light rain. High 77°, low 65°.
0.23Piasa, Monday, 17 August
Light rain. High 80°, low 67°.
0.05Piasa, Tuesday, 18 August
Light rain. High 80°, low 67°.
0Piasa, Wednesday, 19 August
Overcast. High 82°, low 68°.
0
Piasa, Thursday, 20 August
Partly cloudy. High 74°, low 57°.
0.01Piasa, Friday, 21 August
Light rain. High 73°, low 55°.
0.16Piasa, Saturday, 22 August
Light rain. High 80°, low 62°.
0
Piasa, Sunday, 23 August
Mostly clear. High 88°, low 69°.
0.09Piasa, Monday, 24 August
Climate normal for this date — 60-year average.
0.06Piasa, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.12Piasa, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Piasa, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09Piasa, Friday, 28 August
Climate normal for this date — 60-year average.
0.06Piasa, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Piasa, Sunday, 30 August
Climate normal for this date — 60-year average.
0.1Piasa, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Piasa, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.13
Piasa, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.07Piasa, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Piasa, Friday, 4 September
Climate normal for this date — 60-year average.
0.04Piasa, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Piasa, 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 Piasa, 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 Piasa, 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, ID
95°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°79°Weather in Morse, IL73°Weather in Mortimer, IL76°Weather in Moscow, IL79°Weather in Mountjoy, IL73°Weather in Munster, IL73°Weather in Narita, IL76°Weather in Neadmore, IL80°Weather in Neal, IL79°Weather in Neilson, IL78°Weather in Nevada, IL71°Weather in New City, IL80°Weather in New Hope, IL76°Weather in Newby, IL80°Weather in Newcastle, IL76°Weather in Newell, IL74°Weather in Noltings, IL78°Weather in North Hanover, IL68°Weather in North Hooper, IL74°Weather in North Plato, IL68°