Weather in Rapid Valley, SD
Rapid Valley, Saturday, 8 August, 21:25
Clear. Feels like 80°. High 97°, low 64°.
Monthly outlook for Rapid Valley, SD: average high 87.1°, average low 64.2°. That is 1.9° above the climate normal for August. Precipitation is expected on 8 days (about 1.3 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 10 August (100.7°), the coolest 19 August (58.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 87.9° | 83.6° | +2.4° |
| 18 August – 27 August | 85.8° | 83.6° | +1.2° |
| 28 August – 6 September | at normal | 81.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Green Valley (2 mi).
0
Rapid Valley, Sunday, 9 August
Partly cloudy. High 92°, low 66°.
0Rapid Valley, Monday, 10 August
Partly cloudy. High 101°, low 64°.
0.06
Rapid Valley, Tuesday, 11 August
Light rain. High 92°, low 66°.
0.07Rapid Valley, Wednesday, 12 August
Light rain. High 93°, low 62°.
0.72Rapid Valley, Thursday, 13 August
Heavy rain. High 70°, low 61°.
0.08Rapid Valley, Friday, 14 August
Light rain. High 75°, low 64°.
0.03Rapid Valley, Saturday, 15 August
Light rain. High 82°, low 63°.
0.09Rapid Valley, Sunday, 16 August
Light rain. High 83°, low 67°.
0.05Rapid Valley, Monday, 17 August
Light rain. High 93°, low 66°.
0Rapid Valley, Tuesday, 18 August
Partly cloudy. High 97°, low 68°.
0.01Rapid Valley, Wednesday, 19 August
Light rain. High 78°, low 59°.
0.13Rapid Valley, Thursday, 20 August
Light rain. High 82°, low 65°.
0.09Rapid Valley, Friday, 21 August
Light rain. High 87°, low 66°.
0
Rapid Valley, Saturday, 22 August
Clear. High 82°, low 65°.
0Rapid Valley, Sunday, 23 August
Clear. High 89°, low 62°.
0.02
Rapid Valley, Monday, 24 August
Climate normal for this date — 60-year average.
0.02Rapid Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.08Rapid Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.07Rapid Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
0.03Rapid Valley, Friday, 28 August
Climate normal for this date — 60-year average.
0.04Rapid Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
0.03Rapid Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
0.02Rapid Valley, Monday, 31 August
Climate normal for this date — 60-year average.
0.06Rapid Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.07Rapid Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.02Rapid Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
0.06Rapid Valley, Friday, 4 September
Climate normal for this date — 60-year average.
0.04Rapid Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
0.02Rapid Valley, 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 Rapid Valley, SD 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 Rapid Valley, SD 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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