Weather in Fort Thompson, SD
Fort Thompson, Sunday, 9 August, 02:21
Clear. Feels like 71°. High 92°, low 65°.
Monthly outlook for Fort Thompson, SD: average high 90.6°, average low 68.2°. That is 3.3° above the climate normal for August. Precipitation is expected on 6 days (about 1.1 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 19 August (108.4°), the coolest 14 August (59.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 89.5° | 84.7° | +2.7° |
| 19 August – 28 August | 92.4° | 84.6° | +4.3° |
| 29 August – 7 September | at normal | 82.5° | — |
August records over 66 years
0.13
Fort Thompson, Monday, 10 August
Rain. High 97°, low 64°.
0.03Fort Thompson, Tuesday, 11 August
Light rain. High 94°, low 67°.
0.08Fort Thompson, Wednesday, 12 August
Light rain. High 95°, low 68°.
0.28Fort Thompson, Thursday, 13 August
Rain. High 76°, low 63°.
0
Fort Thompson, Friday, 14 August
Overcast. High 69°, low 59°.
0.01Fort Thompson, Saturday, 15 August
Light rain. High 78°, low 63°.
0Fort Thompson, Sunday, 16 August
Overcast. High 91°, low 67°.
0
Fort Thompson, Monday, 17 August
Mostly clear. High 98°, low 69°.
0
Fort Thompson, Tuesday, 18 August
Partly cloudy. High 105°, low 77°.
0.01Fort Thompson, Wednesday, 19 August
Light rain. High 108°, low 80°.
0.01Fort Thompson, Thursday, 20 August
Light rain. High 90°, low 75°.
0.06Fort Thompson, Friday, 21 August
Light rain. High 92°, low 69°.
0.09Fort Thompson, Saturday, 22 August
Light rain. High 98°, low 69°.
0.39Fort Thompson, Sunday, 23 August
Rain. High 82°, low 68°.
0.02Fort Thompson, Monday, 24 August
Light rain. High 84°, low 66°.
0.04Fort Thompson, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.04Fort Thompson, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.04Fort Thompson, Thursday, 27 August
Climate normal for this date — 60-year average.
0.07Fort Thompson, Friday, 28 August
Climate normal for this date — 60-year average.
0.03Fort Thompson, Saturday, 29 August
Climate normal for this date — 60-year average.
0.1Fort Thompson, Sunday, 30 August
Climate normal for this date — 60-year average.
0.03Fort Thompson, Monday, 31 August
Climate normal for this date — 60-year average.
0.07Fort Thompson, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11Fort Thompson, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.05Fort Thompson, Thursday, 3 September
Climate normal for this date — 60-year average.
0.07Fort Thompson, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Fort Thompson, Saturday, 5 September
Climate normal for this date — 60-year average.
0.04Fort Thompson, Sunday, 6 September
Climate normal for this date — 60-year average.
0.08Fort Thompson, 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 Fort Thompson, 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 Fort Thompson, 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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