Weather in Allen, SD
Allen, Thursday, 8 October, 19:57
Mostly clear. Feels like 57°. High 77°, low 45°.
Monthly outlook for Allen, SD: average high 63.1°, average low 43.9°. That is 1.7° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 9 October (87.5°), the coolest 17 October (32.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 65.3° | 60.5° | +2.7° |
| 18 October – 27 October | 59.5° | 58.1° | +0.8° |
| 28 October – 6 November | at normal | 51.7° | — |
October records over 66 years
0
Allen, Friday, 9 October
Clear. High 88°, low 49°.
0Allen, Saturday, 10 October
Clear. High 87°, low 60°.
0
Allen, Sunday, 11 October
Overcast. High 68°, low 54°.
0Allen, Monday, 12 October
Clear. High 71°, low 48°.
0.2
Allen, Tuesday, 13 October
Rain. High 52°, low 43°.
0.64Allen, Wednesday, 14 October
Rain. High 56°, low 40°.
0.5Allen, Thursday, 15 October
Rain. High 54°, low 41°.
0.06
Allen, Friday, 16 October
Snow. High 42°, low 36°.
0Allen, Saturday, 17 October
Clear. High 58°, low 33°.
0
Allen, Sunday, 18 October
Partly cloudy. High 55°, low 44°.
0.23Allen, Monday, 19 October
Light rain. High 46°, low 40°.
0Allen, Tuesday, 20 October
Clear. High 66°, low 42°.
0Allen, Wednesday, 21 October
Clear. High 65°, low 43°.
0Allen, Thursday, 22 October
Clear. High 55°, low 41°.
0Allen, Friday, 23 October
Clear. High 70°, low 44°.
0.06Allen, Saturday, 24 October
Climate normal for this date — 60-year average.
0.03
Allen, Sunday, 25 October
Climate normal for this date — 60-year average.
0.03Allen, Monday, 26 October
Climate normal for this date — 60-year average.
0.02Allen, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06Allen, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09Allen, Thursday, 29 October
Climate normal for this date — 60-year average.
0.05Allen, Friday, 30 October
Climate normal for this date — 60-year average.
0.04Allen, Saturday, 31 October
Climate normal for this date — 60-year average.
0.05Allen, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Allen, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Allen, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Allen, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Allen, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Allen, 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 Allen, 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 Allen, 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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