Weather in Harrison, SD
Harrison, Wednesday, 7 October, 14:20
Overcast. Feels like 73°. High 75°, low 48°.
Monthly outlook for Harrison, SD: average high 66°, average low 47.2°. That is 2.8° above the climate normal for October. Precipitation is expected on 3 days (about 2.7 inches), against a normal of 3 days and 1.1 inches. The warmest day looks like 9 October (88.8°), the coolest 18 October (36.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 68.7° | 61.9° | +3.8° |
| 17 October – 26 October | 61.4° | 58° | +1.9° |
| 27 October – 5 November | at normal | 52° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stickney (12 mi).
0Harrison, Thursday, 8 October
Overcast. High 76°, low 45°.
0
Harrison, Friday, 9 October
Clear. High 89°, low 56°.
0Harrison, Saturday, 10 October
Clear. High 88°, low 69°.
0Harrison, Sunday, 11 October
Overcast. High 73°, low 52°.
0.15
Harrison, Monday, 12 October
Rain. High 49°, low 42°.
0Harrison, Tuesday, 13 October
Overcast. High 56°, low 39°.
1.19Harrison, Wednesday, 14 October
Heavy rain. High 67°, low 48°.
1.31Harrison, Thursday, 15 October
Heavy rain. High 71°, low 44°.
0.01Harrison, Friday, 16 October
Light rain. High 43°, low 41°.
0.03Harrison, Saturday, 17 October
Light rain. High 44°, low 41°.
0Harrison, Sunday, 18 October
Clear. High 54°, low 37°.
0
Harrison, Monday, 19 October
Mostly clear. High 67°, low 41°.
0Harrison, Tuesday, 20 October
Clear. High 73°, low 52°.
0Harrison, Wednesday, 21 October
Mostly clear. High 65°, low 50°.
0Harrison, Thursday, 22 October
Overcast. High 65°, low 50°.
0.08
Harrison, Friday, 23 October
Climate normal for this date — 60-year average.
0.05Harrison, Saturday, 24 October
Climate normal for this date — 60-year average.
0.04Harrison, Sunday, 25 October
Climate normal for this date — 60-year average.
0.02Harrison, Monday, 26 October
Climate normal for this date — 60-year average.
0.05Harrison, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05Harrison, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.07Harrison, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Harrison, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Harrison, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Harrison, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Harrison, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Harrison, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.01Harrison, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Harrison, Thursday, 5 November
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 Harrison, 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 Harrison, 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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