Weather in Jefferson, CA
Jefferson, Saturday, 17 October, 11:21
Overcast. Feels like 84°. High 88°, low 76°.
Monthly outlook for Jefferson, CA: average high 77.4°, average low 65.5°. That is 0° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 18 October (91.5°), the coolest 22 October (57.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 80° | 78.3° | +1° |
| 27 October – 5 November | 73° | 75.8° | -1.5° |
| 6 November – 15 November | at normal | 72.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Florence (3 mi).
0
Jefferson, Sunday, 18 October
Clear. High 92°, low 74°.
0Jefferson, Monday, 19 October
Clear. High 85°, low 64°.
0
Jefferson, Tuesday, 20 October
Mostly clear. High 83°, low 60°.
0.21
Jefferson, Wednesday, 21 October
Light rain. High 72°, low 61°.
0.17Jefferson, Thursday, 22 October
Light rain. High 72°, low 58°.
0Jefferson, Friday, 23 October
Clear. High 73°, low 62°.
0Jefferson, Saturday, 24 October
Clear. High 79°, low 67°.
0Jefferson, Sunday, 25 October
Overcast. High 77°, low 68°.
0Jefferson, Monday, 26 October
Clear. High 79°, low 67°.
0Jefferson, Tuesday, 27 October
Mostly clear. High 82°, low 71°.
0Jefferson, Wednesday, 28 October
Overcast. High 75°, low 68°.
0.02Jefferson, Thursday, 29 October
Light rain. High 73°, low 67°.
0Jefferson, Friday, 30 October
Overcast. High 72°, low 61°.
0Jefferson, Saturday, 31 October
Overcast. High 71°, low 65°.
0.62Jefferson, Sunday, 1 November
Rain. High 65°, low 59°.
0.01Jefferson, Monday, 2 November
Climate normal for this date — 60-year average.
0Jefferson, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Jefferson, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.01Jefferson, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Jefferson, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Jefferson, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Jefferson, Sunday, 8 November
Climate normal for this date — 60-year average.
0.03Jefferson, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Jefferson, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.04Jefferson, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.03Jefferson, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Jefferson, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Jefferson, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Jefferson, Sunday, 15 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, CA 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, CA 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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