Montrose weather in September: Montrose, Colorado: normal highs, lows, rain and records for September
Montrose in September has a normal high of 79°F and a normal low of 48°F, a daily mean of 63°F, falling from 84°F on the 1st to 73°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 1.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 9°C, 30 mm of precipitation in September.
- NOAA stationMontrose Regional Airport
- Station IDUSW00093013
- Location38.51°N 107.90°W
- Elevation5,759 ft (1,755 m)
- Population21,646
- Jan 39° 16°
- Feb 45° 22°
- Mar 55° 29°
- Apr 63° 35°
- May 74° 43°
- Jun 86° 52°
- Jul 90° 58°
- Aug 87° 56°
- Sep 79° 48°
- Oct 65° 36°
- Nov 51° 25°
- Dec 39° 16°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Montrose in September?
The normal high is 79°F and the normal low 48°F, for a daily mean of 63.2°F. September is 8.2°F cooler than August and 12.5°F warmer than October. September is the 4th warmest month of the year in Montrose and the wettest. Across the month the normal high falls 11°F, from 84°F on September 1 to 73°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 61°F and 66°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 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 53°F | 23% | 10% |
| September 8 | 82°F | 51°F | 23% | 11% |
| September 15 | 79°F | 48°F | 24% | 12% |
| September 22 | 76°F | 46°F | 23% | 12% |
| September 30 | 73°F | 43°F | 22% | 11% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 53°F | 23% | 10% | 13 h |
| September 2 | 83°F | 52°F | 23% | 10% | 13 h |
| September 3 | 83°F | 52°F | 23% | 10% | 13 h |
| September 4 | 83°F | 52°F | 23% | 10% | 13 h |
| September 5 | 83°F | 51°F | 23% | 11% | 12 h 50 min |
| September 6 | 82°F | 51°F | 23% | 11% | 12 h 50 min |
| September 7 | 82°F | 51°F | 23% | 11% | 12 h 50 min |
| September 8 | 82°F | 51°F | 23% | 11% | 12 h 50 min |
| September 9 | 81°F | 50°F | 23% | 11% | 12 h 40 min |
| September 10 | 81°F | 50°F | 24% | 11% | 12 h 40 min |
| September 11 | 81°F | 50°F | 24% | 11% | 12 h 40 min |
| September 12 | 80°F | 49°F | 24% | 11% | 12 h 40 min |
| September 13 | 80°F | 49°F | 24% | 12% | 12 h 30 min |
| September 14 | 80°F | 49°F | 24% | 12% | 12 h 30 min |
| September 15 | 79°F | 48°F | 24% | 12% | 12 h 30 min |
| September 16 | 79°F | 48°F | 24% | 12% | 12 h 30 min |
| September 17 | 78°F | 48°F | 23% | 12% | 12 h 20 min |
| September 18 | 78°F | 47°F | 23% | 12% | 12 h 20 min |
| September 19 | 78°F | 47°F | 23% | 12% | 12 h 20 min |
| September 20 | 77°F | 47°F | 23% | 12% | 12 h 20 min |
| September 21 | 77°F | 46°F | 23% | 12% | 12 h 20 min |
| September 22 | 76°F | 46°F | 23% | 12% | 12 h 10 min |
| September 23 | 76°F | 45°F | 23% | 11% | 12 h 10 min |
| September 24 | 75°F | 45°F | 23% | 11% | 12 h 10 min |
| September 25 | 75°F | 45°F | 22% | 11% | 12 h 10 min |
| September 26 | 74°F | 44°F | 22% | 11% | 12 h |
| September 27 | 74°F | 44°F | 22% | 11% | 12 h |
| September 28 | 74°F | 43°F | 22% | 11% | 12 h |
| September 29 | 73°F | 43°F | 22% | 11% | 12 h |
| September 30 | 73°F | 43°F | 22% | 11% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 48°FSeptember average
- Precipitation
- 1.17 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 2
- Nights at 32°F or colder
- 1
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093013; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Montrose in September?
On a given September day the chance of 0.01 inch or more is 23% on average, highest around September 11 (24%). In all, 1.17 in falls on 7 days of a normal September.
In a normal September in Montrose, 2 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093013.
How humid and windy is Montrose in September?
At 3 p.m. the normal temperature is 71°F with 25% relative humidity and a dew point of 33°F; at 6 a.m. it is 45°F with 66% humidity. The wind averages 7.0 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 45°F | 34°F | 66% | 6.5 mph | 80% |
| 9 a.m. | 58°F | 36°F | 44% | 3.3 mph | 85% |
| noon | 67°F | 36°F | 31% | 7.1 mph | 88% |
| 3 p.m. | 71°F | 33°F | 25% | 9.2 mph | 85% |
| 6 p.m. | 65°F | 36°F | 34% | 5.5 mph | 84% |
| 9 p.m. | 54°F | 37°F | 51% | 8.1 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093013. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Montrose?
The warmest September temperature on this station's record (since 1996) is 96°F, on September 6, 2022; the coldest is 25°F, on September 29, 1999. The wettest September brought 3.01 in (2026).
The September mean against the 1991-2020 normal of 63.2°F: 2021 65.4°F (+2.2), 2022 67.1°F (+3.9), 2023 64.8°F (+1.6), 2024 65.6°F (+2.4), 2025 64.1°F (+0.9), 2026 66.7°F (+3.5). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.4°F | +2.2°F | 1.09 in |
| 2022 | 67.1°F | +3.9°F | 1.12 in |
| 2023 | 64.8°F | +1.6°F | 0.22 in |
| 2024 | 65.6°F | +2.4°F | 0.78 in |
| 2025 | 64.1°F | +0.9°F | 0.72 in |
| 2026 | 66.7°F | +3.5°F | 3.01 in |
Source: records: ACIS, station USW00093013; recent months: ACIS, station USW00093013. Records and recent months use complete months only.
How does September in Montrose compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, September normal highs run from 62°F in Leadville to 86°F in Lamar; Montrose's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.