Weather in Spearfish, SD
Spearfish, Thursday, 8 October, 22:31
Partly cloudy. Feels like 54°. High 74°, low 44°.
Monthly outlook for Spearfish, SD: average high 57.9°, average low 38.9°. That is 0.8° above the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 October (82.7°), the coolest 16 October (25°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 58.7° | 57° | +1° |
| 18 October – 27 October | 56.6° | 54.9° | +1° |
| 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).
0
Spearfish, Friday, 9 October
Partly cloudy. High 81°, low 48°.
0
Spearfish, Saturday, 10 October
Light rain. High 83°, low 56°.
0.03Spearfish, Sunday, 11 October
Light rain. High 54°, low 45°.
0.04Spearfish, Monday, 12 October
Light rain. High 53°, low 41°.
0
Spearfish, Tuesday, 13 October
Overcast. High 45°, low 35°.
0.26Spearfish, Wednesday, 14 October
Light rain. High 54°, low 36°.
0.79
Spearfish, Thursday, 15 October
Snow. High 49°, low 33°.
0.3Spearfish, Friday, 16 October
Snow. High 37°, low 25°.
0
Spearfish, Saturday, 17 October
Clear. High 58°, low 25°.
0Spearfish, Sunday, 18 October
Overcast. High 49°, low 37°.
0Spearfish, Monday, 19 October
Overcast. High 51°, low 36°.
0Spearfish, Tuesday, 20 October
Clear. High 58°, low 40°.
0Spearfish, Wednesday, 21 October
Overcast. High 57°, low 41°.
0Spearfish, Thursday, 22 October
Clear. High 54°, low 38°.
0Spearfish, Friday, 23 October
Clear. High 69°, low 44°.
0.04Spearfish, Saturday, 24 October
Climate normal for this date — 60-year average.
0.03
Spearfish, 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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