Weather in Spearfish, SD
Spearfish, Thursday, 8 October, 18:06
Mostly clear. Feels like 68°. High 72°, low 44°.
Monthly outlook for Spearfish, SD: average high 59.6°, average low 41.4°. That is 1.7° above the climate normal for October. Precipitation is expected on 6 days (about 1.5 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 October (81.1°), the coolest 16 October (29.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 57.3° | 57° | +0.2° |
| 18 October – 27 October | 63.5° | 54.9° | +4.8° |
| 28 October – 6 November | at normal | 48.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Mountain Plains (3 mi).
0Spearfish, Friday, 9 October
Mostly clear. High 81°, low 44°.
0
Spearfish, Saturday, 10 October
Clear. High 81°, low 57°.
0.07
Spearfish, Sunday, 11 October
Light rain. High 54°, low 43°.
0.3Spearfish, Monday, 12 October
Rain. High 42°, low 38°.
0Spearfish, Tuesday, 13 October
Mostly clear. High 56°, low 37°.
0.52Spearfish, Wednesday, 14 October
Rain. High 48°, low 43°.
0.28
Spearfish, Thursday, 15 October
Snow. High 41°, low 32°.
0.04Spearfish, Friday, 16 October
Light snow. High 42°, low 29°.
0Spearfish, Saturday, 17 October
Clear. High 56°, low 30°.
0Spearfish, Sunday, 18 October
Clear. High 70°, low 42°.
0.22Spearfish, Monday, 19 October
Rain. High 54°, low 43°.
0.03Spearfish, Tuesday, 20 October
Light rain. High 56°, low 43°.
0Spearfish, Wednesday, 21 October
Clear. High 66°, low 44°.
0Spearfish, Thursday, 22 October
Clear. High 64°, low 47°.
0Spearfish, Friday, 23 October
Clear. High 71°, low 47°.
0.04
Spearfish, Saturday, 24 October
Climate normal for this date — 60-year average.
0.03Spearfish, Sunday, 25 October
Climate normal for this date — 60-year average.
0.07Spearfish, Monday, 26 October
Climate normal for this date — 60-year average.
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.
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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