Weather in Jefferson, IA
Jefferson, Saturday, 10 October, 19:55
Clear. Feels like 75°. High 87°, low 62°.
Monthly outlook for Jefferson, IA: average high 61.8°, average low 46.3°. That is 0.3° above the climate normal for October. Precipitation is expected on 2 days (about 1.2 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 10 October (87.3°), the coolest 18 October (28.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 64.6° | 62.2° | +1.4° |
| 20 October – 29 October | 57° | 58.6° | -0.9° |
| 30 October – 8 November | at normal | 53.1° | — |
October records over 66 years
0
Jefferson, Sunday, 11 October
Clear. High 86°, low 63°.
0Jefferson, Monday, 12 October
Clear. High 87°, low 68°.
0
Jefferson, Tuesday, 13 October
Light rain. High 71°, low 58°.
0
Jefferson, Wednesday, 14 October
Overcast. High 64°, low 53°.
0.93Jefferson, Thursday, 15 October
Rain. High 57°, low 55°.
0Jefferson, Friday, 16 October
Light rain. High 55°, low 34°.
0Jefferson, Saturday, 17 October
Overcast. High 39°, low 28°.
0Jefferson, Sunday, 18 October
Clear. High 44°, low 28°.
0
Jefferson, Monday, 19 October
Partly cloudy. High 55°, low 35°.
0Jefferson, Tuesday, 20 October
Clear. High 63°, low 41°.
0Jefferson, Wednesday, 21 October
Partly cloudy. High 66°, low 47°.
0.24Jefferson, Thursday, 22 October
Rain. High 56°, low 49°.
0Jefferson, Friday, 23 October
Overcast. High 48°, low 41°.
0Jefferson, Saturday, 24 October
Partly cloudy. High 52°, low 38°.
0Jefferson, Sunday, 25 October
Overcast. High 58°, low 41°.
0.05Jefferson, Monday, 26 October
Climate normal for this date — 60-year average.
0.07Jefferson, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06
Jefferson, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09Jefferson, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Jefferson, Friday, 30 October
Climate normal for this date — 60-year average.
0.1Jefferson, Saturday, 31 October
Climate normal for this date — 60-year average.
0.15
Jefferson, Sunday, 1 November
Climate normal for this date — 60-year average.
0.06Jefferson, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Jefferson, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.05Jefferson, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Jefferson, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Jefferson, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Jefferson, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Jefferson, Sunday, 8 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, IA 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, IA 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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