Weather in Arpan, SD
Arpan, Saturday, 17 October, 02:51
Clear. Feels like 48°. High 79°, low 46°.
Monthly outlook for Arpan, SD: average high 61.3°, average low 41.9°. That is 2.8° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (79.2°), the coolest 1 November (33.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 64.5° | 58.3° | +3.4° |
| 27 October – 5 November | 56° | 51.9° | +2.3° |
| 6 November – 15 November | at normal | 46.9° | — |
October records over 66 years
0
Arpan, Sunday, 18 October
Clear. High 69°, low 47°.
0Arpan, Monday, 19 October
Clear. High 62°, low 43°.
0Arpan, Tuesday, 20 October
Clear. High 71°, low 45°.
0Arpan, Wednesday, 21 October
Clear. High 66°, low 47°.
0
Arpan, Thursday, 22 October
Overcast. High 74°, low 52°.
0.09
Arpan, Friday, 23 October
Light rain. High 75°, low 51°.
0.03
Arpan, Saturday, 24 October
Light snow. High 45°, low 35°.
0.01Arpan, Sunday, 25 October
Light snow. High 47°, low 34°.
0Arpan, Monday, 26 October
Overcast. High 56°, low 35°.
0Arpan, Tuesday, 27 October
Overcast. High 62°, low 41°.
0.1Arpan, Wednesday, 28 October
Light rain. High 53°, low 42°.
0
Arpan, Thursday, 29 October
Mostly clear. High 69°, low 39°.
0.07Arpan, Friday, 30 October
Light rain. High 52°, low 41°.
0Arpan, Saturday, 31 October
Overcast. High 46°, low 39°.
0Arpan, Sunday, 1 November
Clear. High 54°, low 33°.
0.02
Arpan, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Arpan, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.01Arpan, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Arpan, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Arpan, Friday, 6 November
Climate normal for this date — 60-year average.
0.03Arpan, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Arpan, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Arpan, Monday, 9 November
Climate normal for this date — 60-year average.
0.05Arpan, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.02Arpan, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Arpan, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Arpan, Friday, 13 November
Climate normal for this date — 60-year average.
0.03Arpan, Saturday, 14 November
Climate normal for this date — 60-year average.
0.02Arpan, Sunday, 15 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 Arpan, 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 Arpan, 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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