Weather in Jefferson, SD
Jefferson, Sunday, 11 October, 03:11
Clear. Feels like 71°. High 88°, low 65°.
Monthly outlook for Jefferson, SD: average high 65.7°, average low 47.6°. That is 2.7° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 1.1 inches. The warmest day looks like 12 October (90.9°), the coolest 17 October (27.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 65.7° | 61.8° | +2.1° |
| 21 October – 30 October | 65.7° | 57.7° | +4.4° |
| 31 October – 9 November | at normal | 52° | — |
October records over 66 years
0
Jefferson, Monday, 12 October
Clear. High 91°, low 62°.
0
Jefferson, Tuesday, 13 October
Overcast. High 62°, low 52°.
0Jefferson, Wednesday, 14 October
Overcast. High 63°, low 50°.
0.02
Jefferson, Thursday, 15 October
Light rain. High 60°, low 50°.
0Jefferson, Friday, 16 October
Overcast. High 54°, low 37°.
0Jefferson, Saturday, 17 October
Clear. High 44°, low 28°.
0Jefferson, Sunday, 18 October
Overcast. High 59°, low 35°.
0
Jefferson, Monday, 19 October
Partly cloudy. High 68°, low 42°.
0Jefferson, Tuesday, 20 October
Clear. High 70°, low 46°.
0Jefferson, Wednesday, 21 October
Clear. High 70°, low 50°.
0Jefferson, Thursday, 22 October
Clear. High 64°, low 47°.
0Jefferson, Friday, 23 October
Overcast. High 65°, low 47°.
0Jefferson, Saturday, 24 October
Partly cloudy. High 66°, low 49°.
0Jefferson, Sunday, 25 October
Overcast. High 58°, low 52°.
0Jefferson, Monday, 26 October
Overcast. High 71°, low 52°.
0.08Jefferson, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04
Jefferson, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Jefferson, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Jefferson, Friday, 30 October
Climate normal for this date — 60-year average.
0.08Jefferson, Saturday, 31 October
Climate normal for this date — 60-year average.
0.08Jefferson, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Jefferson, Monday, 2 November
Climate normal for this date — 60-year average.
0.06Jefferson, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.01Jefferson, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Jefferson, Thursday, 5 November
Climate normal for this date — 60-year average.
0.03Jefferson, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Jefferson, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Jefferson, Sunday, 8 November
Climate normal for this date — 60-year average.
0.15Jefferson, 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 Jefferson, 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 Jefferson, 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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