Weather in Iowa City, IA
Iowa City, Sunday, 9 August, 12:03
Overcast. Feels like 79°. High 91°, low 67°.
Monthly outlook for Iowa City, IA: average high 82.1°, average low 64.1°. That is 0.7° above the climate normal for August. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 11 August (96.2°), the coolest 23 August (59.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 82° | 80.9° | +0.6° |
| 19 August – 28 August | 82.2° | 81.1° | +0.6° |
| 29 August – 7 September | at normal | 79.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Tiffin (7 mi).
0Iowa City, Monday, 10 August
Overcast. High 88°, low 71°.
0Iowa City, Tuesday, 11 August
Overcast. High 96°, low 71°.
0.02
Iowa City, Wednesday, 12 August
Light rain. High 84°, low 70°.
0.38Iowa City, Thursday, 13 August
Light rain. High 70°, low 64°.
0.22Iowa City, Friday, 14 August
Light rain. High 72°, low 62°.
0.43Iowa City, Saturday, 15 August
Rain. High 77°, low 62°.
0.04Iowa City, Sunday, 16 August
Light rain. High 78°, low 63°.
0Iowa City, Monday, 17 August
Overcast. High 78°, low 61°.
0.01Iowa City, Tuesday, 18 August
Light rain. High 84°, low 61°.
0Iowa City, Wednesday, 19 August
Overcast. High 78°, low 64°.
0
Iowa City, Thursday, 20 August
Clear. High 81°, low 62°.
0.04Iowa City, Friday, 21 August
Light rain. High 86°, low 62°.
0Iowa City, Saturday, 22 August
Overcast. High 81°, low 65°.
0Iowa City, Sunday, 23 August
Clear. High 82°, low 60°.
0Iowa City, Monday, 24 August
Clear. High 85°, low 61°.
0.17
Iowa City, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17
Iowa City, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Iowa City, Thursday, 27 August
Climate normal for this date — 60-year average.
0.2Iowa City, Friday, 28 August
Climate normal for this date — 60-year average.
0.1Iowa City, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Iowa City, Sunday, 30 August
Climate normal for this date — 60-year average.
0.1Iowa City, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Iowa City, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Iowa City, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Iowa City, Thursday, 3 September
Climate normal for this date — 60-year average.
0.07Iowa City, Friday, 4 September
Climate normal for this date — 60-year average.
0.07
Iowa City, Saturday, 5 September
Climate normal for this date — 60-year average.
0.11Iowa City, Sunday, 6 September
Climate normal for this date — 60-year average.
0.16Iowa City, 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 Iowa City, 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 Iowa City, 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
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