Weather in Jefferson, CO
Jefferson, Sunday, 11 October, 15:52
Overcast. Feels like 59°. High 63°, low 45°.
Monthly outlook for Jefferson, CO: average high 47.1°, average low 25°. That is 0.3° above the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 11 October (63.2°), the coolest 25 October (6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 50.9° | 47.8° | +1.8° |
| 21 October – 30 October | 40.8° | 43.3° | -1.4° |
| 31 October – 9 November | at normal | 38.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Como (6 mi).
0
Jefferson, Monday, 12 October
Light rain. High 62°, low 44°.
0.11Jefferson, Tuesday, 13 October
Light rain. High 49°, low 33°.
0.66
Jefferson, Wednesday, 14 October
Snow. High 40°, low 26°.
0.04Jefferson, Thursday, 15 October
Light snow. High 35°, low 16°.
0
Jefferson, Friday, 16 October
Clear. High 39°, low 8°.
0Jefferson, Saturday, 17 October
Clear. High 53°, low 19°.
0Jefferson, Sunday, 18 October
Clear. High 57°, low 30°.
0Jefferson, Monday, 19 October
Clear. High 55°, low 33°.
0Jefferson, Tuesday, 20 October
Clear. High 54°, low 33°.
0Jefferson, Wednesday, 21 October
Clear. High 55°, low 31°.
0Jefferson, Thursday, 22 October
Light snow. High 54°, low 32°.
0.96Jefferson, Friday, 23 October
Snow. High 34°, low 19°.
0.17Jefferson, Saturday, 24 October
Light snow. High 28°, low 10°.
0Jefferson, Sunday, 25 October
Clear. High 36°, low 6°.
0Jefferson, Monday, 26 October
Clear. High 37°, low 13°.
0.03
Jefferson, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05Jefferson, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.07
Jefferson, Thursday, 29 October
Climate normal for this date — 60-year average.
0.06Jefferson, Friday, 30 October
Climate normal for this date — 60-year average.
0.04Jefferson, Saturday, 31 October
Climate normal for this date — 60-year average.
0.05Jefferson, Sunday, 1 November
Climate normal for this date — 60-year average.
0.05Jefferson, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Jefferson, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02
Jefferson, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Jefferson, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Jefferson, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Jefferson, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Jefferson, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Jefferson, 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, CO 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, CO 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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