Weather in Mount Vernon, IA
Mount Vernon, Saturday, 8 August, 23:24
Mostly clear. Feels like 68°. High 82°, low 63°.
Monthly outlook for Mount Vernon, IA: average high 78.7°, average low 62.3°. That is 0.7° below the climate normal for August. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 9 August (90°), the coolest 21 August (51.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 79.6° | 80° | -0.3° |
| 18 August – 27 August | 77.3° | 80° | -1.5° |
| 28 August – 6 September | at normal | 78.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Morley (11 mi).
0
Mount Vernon, Sunday, 9 August
Overcast. High 90°, low 66°.
0Mount Vernon, Monday, 10 August
Overcast. High 87°, low 71°.
0Mount Vernon, Tuesday, 11 August
Overcast. High 87°, low 70°.
0Mount Vernon, Wednesday, 12 August
Overcast. High 82°, low 68°.
0.09
Mount Vernon, Thursday, 13 August
Light rain. High 71°, low 61°.
0Mount Vernon, Friday, 14 August
Overcast. High 77°, low 60°.
0.08Mount Vernon, Saturday, 15 August
Light rain. High 66°, low 59°.
0Mount Vernon, Sunday, 16 August
Overcast. High 72°, low 60°.
0
Mount Vernon, Monday, 17 August
Partly cloudy. High 82°, low 64°.
0Mount Vernon, Tuesday, 18 August
Partly cloudy. High 87°, low 67°.
0.06Mount Vernon, Wednesday, 19 August
Light rain. High 74°, low 61°.
0.15Mount Vernon, Thursday, 20 August
Rain. High 66°, low 53°.
0Mount Vernon, Friday, 21 August
Overcast. High 73°, low 52°.
0Mount Vernon, Saturday, 22 August
Overcast. High 83°, low 58°.
0
Mount Vernon, Sunday, 23 August
Clear. High 81°, low 63°.
0.09Mount Vernon, Monday, 24 August
Climate normal for this date — 60-year average.
0.19
Mount Vernon, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15Mount Vernon, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13Mount Vernon, Thursday, 27 August
Climate normal for this date — 60-year average.
0.2Mount Vernon, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Mount Vernon, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08Mount Vernon, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08
Mount Vernon, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Mount Vernon, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Mount Vernon, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Mount Vernon, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Mount Vernon, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Mount Vernon, Saturday, 5 September
Climate normal for this date — 60-year average.
0.08Mount Vernon, 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 Mount Vernon, IA 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 Mount Vernon, IA 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
70°Weather in Annapolis, MD77°Weather in Atlanta, GA76°Weather in Augusta, ME71°Weather in Austin, TX85°Weather in Baton Rouge, LA
80°Weather in Bismarck, ND73°Weather in Boise, ID82°Weather in Boston, MA75°Weather in Carson City, NV88°Weather in Charleston, WV75°Weather in Charlotte Amalie, VI81°Weather in Cheyenne, WY80°Weather in Columbia, SC78°Weather in Columbus, OH75°Weather in Concord, NH72°Weather in Denver, CO85°Weather in Des Moines, IA74°Weather in Dover, DE77°Weather in Frankfort, KY78°Weather in Harrisburg, PA74°Weather in Hartford, CT72°Weather in Helena, MT72°Weather in Honolulu, HI80°Weather in Indianapolis, IN75°Weather in Jackson, MS80°Weather in Jefferson City, MO79°Weather in Juneau, AK50°Weather in Lansing, MI66°Weather in Lincoln, NE79°Weather in Little Rock, AR77°Weather in Madison, WI67°Weather in Montgomery, AL81°Weather in Montpelier, VT64°Weather in Nashville, TN73°Weather in Oklahoma City, OK89°Weather in Olympia, WA68°Weather in Phoenix, AZ98°Weather in Pierre, SD80°Weather in Providence, RI73°Weather in Raleigh, NC76°Weather in Richmond, VA80°Weather in Sacramento, CA79°Weather in Salem, OR75°Weather in Salt Lake City, UT86°Weather in San Juan, PR83°Weather in Santa Fe, NM76°Weather in Springfield, IL77°Weather in St. Paul, MN72°Weather in Tallahassee, FL77°Weather in Topeka, KS80°Weather in Trenton, NJ76°Weather in Washington, DC77°71°Weather in Prairie City, IA74°Weather in Reasnor, IA71°Weather in Panora, IA69°Weather in Lone Tree, IA69°Weather in Shueyville, IA68°Weather in Solon, IA69°Weather in Swisher, IA68°Weather in Oxford, IA66°Weather in Long Grove, IA69°Weather in Panorama Park, IA70°Weather in Princeton, IA70°Weather in Riverdale, IA70°Weather in Stockton, IA69°Weather in Riverside, IA71°Weather in Spring Hill, IA73°Weather in St. Marys, IA72°Weather in Sandyville, IA71°Weather in Sigourney, IA71°Weather in South English, IA70°