Weather in Arpan, SD
Arpan, Sunday, 11 October, 22:21
Light rain. Feels like 49°. High 57°, low 50°.
Monthly outlook for Arpan, SD: average high 61.8°, average low 43.4°. That is 1.8° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (76.8°), the coolest 16 October (33.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 63.4° | 59.4° | +2.2° |
| 21 October – 30 October | 59.3° | 55.8° | +2° |
| 31 October – 9 November | at normal | 49.9° | — |
October records over 66 years
0.02Arpan, Monday, 12 October
Light rain. High 52°, low 45°.
0Arpan, Tuesday, 13 October
Light rain. High 50°, low 42°.
0
Arpan, Wednesday, 14 October
Mostly clear. High 60°, low 44°.
0.02Arpan, Thursday, 15 October
Light rain. High 55°, low 44°.
0
Arpan, Friday, 16 October
Clear. High 63°, low 33°.
0Arpan, Saturday, 17 October
Clear. High 77°, low 37°.
0
Arpan, Sunday, 18 October
Overcast. High 76°, low 54°.
0Arpan, Monday, 19 October
Clear. High 72°, low 51°.
0.01Arpan, Tuesday, 20 October
Light rain. High 71°, low 47°.
0Arpan, Wednesday, 21 October
Overcast. High 53°, low 44°.
0Arpan, Thursday, 22 October
Clear. High 58°, low 42°.
0Arpan, Friday, 23 October
Clear. High 63°, low 39°.
0Arpan, Saturday, 24 October
Overcast. High 70°, low 44°.
0
Arpan, Sunday, 25 October
Partly cloudy. High 55°, low 43°.
0Arpan, Monday, 26 October
Partly cloudy. High 57°, low 36°.
0.03Arpan, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05Arpan, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.1Arpan, Thursday, 29 October
Climate normal for this date — 60-year average.
0.03Arpan, Friday, 30 October
Climate normal for this date — 60-year average.
0.04Arpan, Saturday, 31 October
Climate normal for this date — 60-year average.
0.06Arpan, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Arpan, 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.
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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