Longmont weather in October: Longmont, Colorado: normal highs, lows, rain and records for October
Longmont in October has a normal high of 66°F and a normal low of 33°F, a daily mean of 50°F, falling from 73°F on the 1st to 60°F by the 31st. Measurable precipitation falls on 5 days in a normal October, 1.04 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 0°C, 26 mm of precipitation in October.
- NOAA stationLongmont (2 mi ESE)
- Station IDUSC00055116
- Location40.17°N 105.08°W
- Elevation4,950 ft (1,509 m)
- From the center1 miles
- Population99,818
- Jan 45° 14°
- Feb 47° 17°
- Mar 57° 26°
- Apr 63° 32°
- May 73° 41°
- Jun 84° 51°
- Jul 91° 55°
- Aug 88° 54°
- Sep 80° 46°
- Oct 66° 33°
- Nov 54° 24°
- Dec 45° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Longmont in October?
The normal high is 66°F and the normal low 33°F, for a daily mean of 49.5°F. October is 13.5°F cooler than September and 11.0°F warmer than November. October is the 6th warmest month of the year in Longmont and the 8th wettest. Across the month the normal high falls 13°F, from 73°F on October 1 to 60°F on October 31. From one year to the next October's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 46°F and 53°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 73°F | 39°F | 20% | 11% |
| October 8 | 70°F | 36°F | 18% | 10% |
| October 15 | 66°F | 33°F | 17% | 10% |
| October 22 | 63°F | 31°F | 17% | 9% |
| October 31 | 60°F | 28°F | 17% | 10% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 73°F | 39°F | 20% | 11% | 11 h 50 min |
| October 2 | 73°F | 38°F | 19% | 11% | 11 h 50 min |
| October 3 | 72°F | 38°F | 19% | 11% | 11 h 40 min |
| October 4 | 72°F | 37°F | 19% | 11% | 11 h 40 min |
| October 5 | 71°F | 37°F | 19% | 11% | 11 h 40 min |
| October 6 | 71°F | 37°F | 19% | 11% | 11 h 40 min |
| October 7 | 70°F | 36°F | 19% | 10% | 11 h 30 min |
| October 8 | 70°F | 36°F | 18% | 10% | 11 h 30 min |
| October 9 | 69°F | 35°F | 18% | 10% | 11 h 30 min |
| October 10 | 69°F | 35°F | 18% | 10% | 11 h 30 min |
| October 11 | 68°F | 34°F | 18% | 10% | 11 h 20 min |
| October 12 | 68°F | 34°F | 18% | 10% | 11 h 20 min |
| October 13 | 67°F | 34°F | 18% | 10% | 11 h 20 min |
| October 14 | 67°F | 33°F | 18% | 10% | 11 h 20 min |
| October 15 | 66°F | 33°F | 17% | 10% | 11 h 10 min |
| October 16 | 66°F | 33°F | 17% | 10% | 11 h 10 min |
| October 17 | 66°F | 32°F | 17% | 10% | 11 h 10 min |
| October 18 | 65°F | 32°F | 17% | 10% | 11 h 10 min |
| October 19 | 65°F | 32°F | 17% | 10% | 11 h |
| October 20 | 64°F | 31°F | 17% | 9% | 11 h |
| October 21 | 64°F | 31°F | 17% | 9% | 11 h |
| October 22 | 63°F | 31°F | 17% | 9% | 11 h |
| October 23 | 63°F | 30°F | 17% | 10% | 10 h 50 min |
| October 24 | 63°F | 30°F | 17% | 10% | 10 h 50 min |
| October 25 | 62°F | 30°F | 17% | 10% | 10 h 50 min |
| October 26 | 62°F | 30°F | 17% | 10% | 10 h 50 min |
| October 27 | 61°F | 29°F | 17% | 10% | 10 h 40 min |
| October 28 | 61°F | 29°F | 17% | 10% | 10 h 40 min |
| October 29 | 61°F | 29°F | 17% | 10% | 10 h 40 min |
| October 30 | 60°F | 29°F | 17% | 10% | 10 h 40 min |
| October 31 | 60°F | 28°F | 17% | 10% | 10 h 30 min |
- Normal high
- 66°FOctober average
- Normal low
- 33°FOctober average
- Precipitation
- 1.04 inmonth total
- Days with precipitation
- 50.01 inch or more
- Nights at 32°F or colder
- 15
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 14
- Days at 80°F or more
- 5
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00055116; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Longmont in October?
On a given October day the chance of 0.01 inch or more is 18% on average, highest around October 1 (20%). In all, 1.04 in falls on 5 days of a normal October.
In a normal October in Longmont, 15 nights fall to freezing and 1 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00055116.
What are the records for October in Longmont?
The warmest October temperature on this station's record (since 1893) is 92°F, on October 17, 1926; the coldest is −5°F, on October 28, 1917. The wettest October brought 4.81 in (1969); the snowiest, 22.5 inches (1969).
The October mean against the 1991-2020 normal of 49.5°F: 2021 51.9°F (+2.4), 2022 52.3°F (+2.8), 2023 51.4°F (+1.9), 2024 56.1°F (+6.6), 2025 52.9°F (+3.4). 5 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.9°F | +2.4°F | 0.35 in |
| 2022 | 52.3°F | +2.8°F | 0.83 in |
| 2023 | 51.4°F | +1.9°F | 0.55 in |
| 2024 | 56.1°F | +6.6°F | 0.05 in |
| 2025 | 52.9°F | +3.4°F | 0.46 in |
Source: records: ACIS, station USC00055116; recent months: ACIS, station USC00055116. Records and recent months use complete months only.
How does October in Longmont compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, October normal highs run from 50°F in Leadville to 72°F in Rocky Ford; Longmont's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.