Weather in Arpan, SD
Arpan, Friday, 16 October, 13:21
Clear. Feels like 50°. High 54°, low 32°.
Monthly outlook for Arpan, SD: average high 58.7°, average low 40.8°. That is 1.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (73.5°), the coolest 16 October (31.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 64.4° | 58.5° | +3.2° |
| 26 October – 4 November | 49.2° | 52.6° | -1.9° |
| 5 November – 14 November | at normal | 47.3° | — |
October records over 66 years
0
Arpan, Saturday, 17 October
Mostly clear. High 73°, low 40°.
0Arpan, Sunday, 18 October
Clear. High 69°, low 46°.
0Arpan, Monday, 19 October
Clear. High 63°, low 41°.
0Arpan, Tuesday, 20 October
Clear. High 71°, low 47°.
0Arpan, Wednesday, 21 October
Clear. High 66°, low 47°.
0Arpan, Thursday, 22 October
Mostly clear. High 73°, low 47°.
0.02
Arpan, Friday, 23 October
Light rain. High 73°, low 50°.
0
Arpan, Saturday, 24 October
Overcast. High 53°, low 41°.
0Arpan, Sunday, 25 October
Overcast. High 48°, low 37°.
0Arpan, Monday, 26 October
Overcast. High 48°, low 34°.
0
Arpan, Tuesday, 27 October
Partly cloudy. High 57°, low 33°.
0.08Arpan, Wednesday, 28 October
Light rain. High 43°, low 40°.
0.44Arpan, Thursday, 29 October
Rain. High 53°, low 43°.
0Arpan, Friday, 30 October
Overcast. High 52°, low 38°.
0.02Arpan, Saturday, 31 October
Light rain. High 42°, low 36°.
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.
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.
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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