Weather in Harpers Ferry, IA
Harpers Ferry, Sunday, 9 August, 08:25
Rain. Feels like 68°. High 83°, low 64°.
Monthly outlook for Harpers Ferry, IA: average high 78.4°, average low 62°. That is 0.1° below the climate normal for August. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 12 August (83.8°), the coolest 23 August (56.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78° | 78.8° | -0.4° |
| 19 August – 28 August | 79.1° | 78.6° | +0.3° |
| 29 August – 7 September | at normal | 76.8° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Waterville (7 mi).
0.02Harpers Ferry, Monday, 10 August
Light rain. High 83°, low 69°.
0.05Harpers Ferry, Tuesday, 11 August
Rain. High 80°, low 67°.
0
Harpers Ferry, Wednesday, 12 August
Partly cloudy. High 84°, low 67°.
0.03Harpers Ferry, Thursday, 13 August
Light rain. High 75°, low 63°.
0
Harpers Ferry, Friday, 14 August
Overcast. High 75°, low 57°.
0.1Harpers Ferry, Saturday, 15 August
Light rain. High 69°, low 62°.
0.02Harpers Ferry, Sunday, 16 August
Light rain. High 71°, low 61°.
0Harpers Ferry, Monday, 17 August
Overcast. High 79°, low 58°.
0.01Harpers Ferry, Tuesday, 18 August
Light rain. High 80°, low 61°.
0.01Harpers Ferry, Wednesday, 19 August
Light rain. High 73°, low 62°.
0Harpers Ferry, Thursday, 20 August
Overcast. High 79°, low 61°.
0.03Harpers Ferry, Friday, 21 August
Light rain. High 82°, low 63°.
0
Harpers Ferry, Saturday, 22 August
Clear. High 79°, low 62°.
0Harpers Ferry, Sunday, 23 August
Clear. High 80°, low 56°.
0Harpers Ferry, Monday, 24 August
Clear. High 82°, low 60°.
0.11Harpers Ferry, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.13
Harpers Ferry, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.15Harpers Ferry, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19Harpers Ferry, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Harpers Ferry, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13Harpers Ferry, Sunday, 30 August
Climate normal for this date — 60-year average.
0.04
Harpers Ferry, Monday, 31 August
Climate normal for this date — 60-year average.
0.08Harpers Ferry, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.08Harpers Ferry, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.15Harpers Ferry, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11Harpers Ferry, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Harpers Ferry, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Harpers Ferry, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Harpers Ferry, 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 Harpers Ferry, 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 Harpers Ferry, 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
75°Weather in Annapolis, MD79°Weather in Atlanta, GA76°Weather in Augusta, ME73°Weather in Austin, TX77°Weather in Baton Rouge, LA77°Weather in Bismarck, ND61°Weather in Boise, ID
63°Weather in Boston, MA78°Weather in Carson City, NV70°Weather in Charleston, WV75°Weather in Charlotte Amalie, VI85°Weather in Cheyenne, WY66°Weather in Columbia, SC77°Weather in Columbus, OH70°Weather in Concord, NH74°Weather in Denver, CO70°Weather in Des Moines, IA72°Weather in Dover, DE81°Weather in Frankfort, KY73°Weather in Harrisburg, PA77°Weather in Hartford, CT75°Weather in Helena, MT62°Weather in Honolulu, HI76°Weather in Indianapolis, IN73°Weather in Jackson, MS74°Weather in Jefferson City, MO76°Weather in Juneau, AK47°Weather in Lansing, MI64°Weather in Lincoln, NE77°Weather in Little Rock, AR73°Weather in Madison, WI66°Weather in Montgomery, AL75°Weather in Montpelier, VT71°Weather in Nashville, TN71°Weather in Oklahoma City, OK77°Weather in Olympia, WA52°Weather in Phoenix, AZ
91°Weather in Pierre, SD68°Weather in Providence, RI79°Weather in Raleigh, NC77°Weather in Richmond, VA78°Weather in Sacramento, CA65°Weather in Salem, OR55°Weather in Salt Lake City, UT77°Weather in San Juan, PR84°Weather in Santa Fe, NM65°Weather in Springfield, IL74°Weather in St. Paul, MN69°Weather in Tallahassee, FL75°Weather in Topeka, KS78°Weather in Trenton, NJ78°Weather in Washington, DC80°76°Weather in Cantril, IA73°Weather in Birmingham, IA72°Weather in Bonaparte, IA74°Weather in Beaconsfield, IA75°Weather in Benton, IA76°Weather in Delphos, IA76°Weather in Diagonal, IA76°Weather in Davis City, IA76°Weather in Decatur City, IA76°Weather in Clio, IA72°Weather in Corydon, IA73°Weather in Allerton, IA72°Weather in Humeston, IA73°Weather in Cincinnati, IA74°Weather in Houghton, IA72°Weather in Donnellson, IA75°Weather in Forest City, IA66°Weather in Lake Mills, IA65°Weather in Leland, IA66°