Weather in Longmont, CO
Longmont, Saturday, 17 October, 07:24
Clear. Feels like 43°. High 74°, low 40°.
Monthly outlook for Longmont, CO: average high 66.4°, average low 42.8°. That is 4.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (74.2°), the coolest 31 October (30.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 69.7° | 61.1° | +4.8° |
| 27 October – 5 November | 60.9° | 54° | +3.8° |
| 6 November – 15 November | at normal | 51.2° | — |
October records over 66 years
0
Longmont, Sunday, 18 October
Partly cloudy. High 73°, low 42°.
0
Longmont, Monday, 19 October
Mostly clear. High 64°, low 46°.
0Longmont, Tuesday, 20 October
Mostly clear. High 69°, low 42°.
0Longmont, Wednesday, 21 October
Partly cloudy. High 72°, low 43°.
0
Longmont, Thursday, 22 October
Overcast. High 70°, low 47°.
0.04
Longmont, Friday, 23 October
Light rain. High 73°, low 51°.
0Longmont, Saturday, 24 October
Partly cloudy. High 66°, low 49°.
0Longmont, Sunday, 25 October
Overcast. High 64°, low 40°.
0Longmont, Monday, 26 October
Overcast. High 70°, low 46°.
0Longmont, Tuesday, 27 October
Clear. High 73°, low 43°.
0Longmont, Wednesday, 28 October
Clear. High 68°, low 48°.
0Longmont, Thursday, 29 October
Overcast. High 65°, low 43°.
0.07Longmont, Friday, 30 October
Light rain. High 53°, low 38°.
0Longmont, Saturday, 31 October
Overcast. High 49°, low 30°.
0Longmont, Sunday, 1 November
Clear. High 56°, low 33°.
0.07Longmont, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Longmont, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.03Longmont, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Longmont, Thursday, 5 November
Climate normal for this date — 60-year average.
0.03Longmont, Friday, 6 November
Climate normal for this date — 60-year average.
0.03Longmont, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Longmont, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Longmont, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Longmont, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.04Longmont, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Longmont, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Longmont, Friday, 13 November
Climate normal for this date — 60-year average.
0.06Longmont, Saturday, 14 November
Climate normal for this date — 60-year average.
0.04Longmont, 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 Longmont, 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 Longmont, 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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