Weather in Longmont, CO
Longmont, Monday, 19 October, 07:09
Clear. Feels like 40°. High 68°, low 42°.
Monthly outlook for Longmont, CO: average high 64.5°, average low 42.5°. That is 3.9° 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 21 October (74.1°), the coolest 28 October (28.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 64.8° | 60.2° | +2.6° |
| 29 October – 7 November | 64° | 53.4° | +5.9° |
| 8 November – 17 November | at normal | 50.4° | — |
October records over 66 years
0
Longmont, Tuesday, 20 October
Clear. High 74°, low 41°.
0
Longmont, Wednesday, 21 October
Overcast. High 74°, low 45°.
0Longmont, Thursday, 22 October
Overcast. High 70°, low 49°.
0Longmont, Friday, 23 October
Clear. High 74°, low 50°.
0Longmont, Saturday, 24 October
Overcast. High 57°, low 46°.
0Longmont, Sunday, 25 October
Clear. High 59°, low 40°.
0
Longmont, Monday, 26 October
Partly cloudy. High 68°, low 44°.
0Longmont, Tuesday, 27 October
Clear. High 48°, low 36°.
0Longmont, Wednesday, 28 October
Clear. High 55°, low 28°.
0Longmont, Thursday, 29 October
Partly cloudy. High 70°, low 40°.
0.02
Longmont, Friday, 30 October
Light rain. High 59°, low 47°.
0Longmont, Saturday, 31 October
Clear. High 65°, low 41°.
0Longmont, Sunday, 1 November
Overcast. High 66°, low 43°.
0Longmont, Monday, 2 November
Light rain. High 65°, low 47°.
0.09Longmont, Tuesday, 3 November
Light rain. High 59°, low 41°.
0.03
Longmont, 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.
0.04Longmont, Tuesday, 17 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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