Weather in Rock Rapids, IA
Rock Rapids, Sunday, 9 August, 00:07
Mostly clear. Feels like 67°. High 85°, low 66°.
Monthly outlook for Rock Rapids, IA: average high 88.3°, average low 60.6°. That is 5.1° above the climate normal for August. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 18 August (102.1°), the coolest 21 August (51°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 89.6° | 79.1° | +5.8° |
| 19 August – 28 August | 86.2° | 79.3° | +3.9° |
| 29 August – 7 September | at normal | 77.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Ellsworth (10 mi).
0.01
Rock Rapids, Monday, 10 August
Light rain. High 100°, low 66°.
0.02Rock Rapids, Tuesday, 11 August
Light rain. High 95°, low 63°.
0
Rock Rapids, Wednesday, 12 August
Overcast. High 94°, low 65°.
0.14Rock Rapids, Thursday, 13 August
Light rain. High 79°, low 60°.
0Rock Rapids, Friday, 14 August
Overcast. High 88°, low 57°.
0Rock Rapids, Saturday, 15 August
Overcast. High 74°, low 63°.
0Rock Rapids, Sunday, 16 August
Overcast. High 86°, low 57°.
0
Rock Rapids, Monday, 17 August
Partly cloudy. High 93°, low 65°.
0.03Rock Rapids, Tuesday, 18 August
Light rain. High 102°, low 63°.
0.07Rock Rapids, Wednesday, 19 August
Light rain. High 83°, low 59°.
0.02Rock Rapids, Thursday, 20 August
Light rain. High 69°, low 59°.
0Rock Rapids, Friday, 21 August
Overcast. High 85°, low 51°.
0.05Rock Rapids, Saturday, 22 August
Light rain. High 93°, low 57°.
0
Rock Rapids, Sunday, 23 August
Clear. High 91°, low 56°.
0.13Rock Rapids, Monday, 24 August
Light rain. High 97°, low 61°.
0.13Rock Rapids, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.13
Rock Rapids, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.07Rock Rapids, Thursday, 27 August
Climate normal for this date — 60-year average.
0.12Rock Rapids, Friday, 28 August
Climate normal for this date — 60-year average.
0.05
Rock Rapids, Saturday, 29 August
Climate normal for this date — 60-year average.
0.1Rock Rapids, Sunday, 30 August
Climate normal for this date — 60-year average.
0.12Rock Rapids, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Rock Rapids, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11Rock Rapids, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Rock Rapids, Thursday, 3 September
Climate normal for this date — 60-year average.
0.15Rock Rapids, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Rock Rapids, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Rock Rapids, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Rock Rapids, 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 Rock Rapids, 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 Rock Rapids, 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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