Weather in Longmont, CO
Longmont, Sunday, 18 October, 12:15
Partly cloudy. Feels like 69°. High 74°, low 45°.
Monthly outlook for Longmont, CO: average high 65.3°, average low 43.3°. That is 4° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 18 October (73.5°), the coolest 31 October (27.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 67.5° | 60.5° | +3.9° |
| 28 October – 6 November | 61.5° | 53.7° | +4.3° |
| 7 November – 16 November | at normal | 50.9° | — |
October records over 66 years
0
Longmont, Monday, 19 October
Clear. High 69°, low 42°.
0Longmont, Tuesday, 20 October
Partly cloudy. High 71°, low 42°.
0
Longmont, Wednesday, 21 October
Mostly clear. High 73°, low 43°.
0
Longmont, Thursday, 22 October
Overcast. High 71°, low 49°.
0Longmont, Friday, 23 October
Clear. High 72°, low 51°.
0.43
Longmont, Saturday, 24 October
Rain. High 52°, low 47°.
0Longmont, Sunday, 25 October
Overcast. High 60°, low 42°.
0Longmont, Monday, 26 October
Overcast. High 63°, low 46°.
0Longmont, Tuesday, 27 October
Overcast. High 71°, low 52°.
0Longmont, Wednesday, 28 October
Overcast. High 68°, low 50°.
0Longmont, Thursday, 29 October
Overcast. High 68°, low 46°.
0Longmont, Friday, 30 October
Light rain. High 52°, low 32°.
0Longmont, Saturday, 31 October
Clear. High 53°, low 28°.
0Longmont, Sunday, 1 November
Clear. High 62°, low 32°.
0Longmont, Monday, 2 November
Overcast. High 66°, low 46°.
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.
0.02Longmont, Monday, 16 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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