Weather in Arpan, SD
Arpan, Monday, 19 October, 22:58
Clear. Feels like 49°. High 66°, low 43°.
Monthly outlook for Arpan, SD: average high 63°, average low 41.3°. That is 4.4° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (79.2°), the coolest 28 October (26.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 61.5° | 57.5° | +2.2° |
| 29 October – 7 November | 65.6° | 51° | +8.1° |
| 8 November – 17 November | at normal | 46° | — |
October records over 66 years
0
Arpan, Tuesday, 20 October
Clear. High 73°, low 44°.
0
Arpan, Wednesday, 21 October
Overcast. High 66°, low 44°.
0Arpan, Thursday, 22 October
Clear. High 79°, low 51°.
0Arpan, Friday, 23 October
Overcast. High 79°, low 54°.
0Arpan, Saturday, 24 October
Clear. High 58°, low 43°.
0Arpan, Sunday, 25 October
Overcast. High 50°, low 38°.
0
Arpan, Monday, 26 October
Mostly clear. High 48°, low 33°.
0Arpan, Tuesday, 27 October
Clear. High 42°, low 28°.
0Arpan, Wednesday, 28 October
Clear. High 54°, low 27°.
0Arpan, Thursday, 29 October
Clear. High 59°, low 35°.
0Arpan, Friday, 30 October
Mostly clear. High 68°, low 39°.
0Arpan, Saturday, 31 October
Overcast. High 65°, low 44°.
0
Arpan, Sunday, 1 November
Partly cloudy. High 66°, low 46°.
0Arpan, Monday, 2 November
Clear. High 70°, low 47°.
0Arpan, Tuesday, 3 November
Overcast. High 66°, low 46°.
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.
0.02Arpan, Monday, 16 November
Climate normal for this date — 60-year average.
0.02Arpan, Tuesday, 17 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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