Weather in Spearfish, SD
Spearfish, Sunday, 11 October, 05:30
Overcast. Feels like 45°. High 58°, low 44°.
Monthly outlook for Spearfish, SD: average high 59.3°, average low 40.6°. That is 2° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 18 October (71°), the coolest 16 October (27.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 58° | 56.3° | +1° |
| 21 October – 30 October | 61.3° | 52.9° | +4.7° |
| 31 October – 9 November | at normal | 47.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Mountain Plains (3 mi).
0.02
Spearfish, Monday, 12 October
Light rain. High 51°, low 38°.
0.02Spearfish, Tuesday, 13 October
Light rain. High 50°, low 37°.
0.12Spearfish, Wednesday, 14 October
Light rain. High 53°, low 39°.
0.17Spearfish, Thursday, 15 October
Light rain. High 52°, low 41°.
0
Spearfish, Friday, 16 October
Clear. High 51°, low 27°.
0Spearfish, Saturday, 17 October
Clear. High 62°, low 30°.
0Spearfish, Sunday, 18 October
Overcast. High 71°, low 52°.
0
Spearfish, Monday, 19 October
Partly cloudy. High 70°, low 51°.
0Spearfish, Tuesday, 20 October
Partly cloudy. High 62°, low 50°.
0
Spearfish, Wednesday, 21 October
Mostly clear. High 59°, low 43°.
0Spearfish, Thursday, 22 October
Overcast. High 65°, low 39°.
0Spearfish, Friday, 23 October
Mostly clear. High 66°, low 43°.
0Spearfish, Saturday, 24 October
Overcast. High 52°, low 36°.
0Spearfish, Sunday, 25 October
Clear. High 62°, low 38°.
0Spearfish, Monday, 26 October
Clear. High 64°, low 43°.
0.05Spearfish, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06Spearfish, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.11
Spearfish, Thursday, 29 October
Climate normal for this date — 60-year average.
0.04Spearfish, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Spearfish, Saturday, 31 October
Climate normal for this date — 60-year average.
0.08Spearfish, Sunday, 1 November
Climate normal for this date — 60-year average.
0.05Spearfish, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Spearfish, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Spearfish, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Spearfish, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Spearfish, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Spearfish, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Spearfish, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Spearfish, Monday, 9 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 Spearfish, 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 Spearfish, 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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