Vail, CO weather in September
September in Vail: mild, with some rain. Highs 67°F, lows 34°F, about 9 wet days and about 0.9 in of snow. A great month for outdoor plans.
- Normal high
- 67°F
- Normal low
- 34°F
- Wet days
- 9
- 2.0 in total
- Snowfall
- 0.9 in
- snow on the ground 1 day
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 71°F | 62°F |
| Normal low | 38°F | 30°F |
| Chance of a wet day | 34% | 26% |
| Sunrise / sunset | 6:33 am / 7:37 pm | 7:00 am / 6:50 pm |
| Daylight | 13.1 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)21 of 30
- Hot dayshigh 90°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below12 of 30
- Snow on the groundsnow depth 1 in or more1 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain and snow in September
Normal precipitation is 2.0 in; a dry September brings about 1.4 in and a wet one about 2.5 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 0.9 in, with about 1 day of an inch or more.
How September varies from year to year
- Warmest September, 1991-20201998: average high 71°F
- Coolest September2006: average high 60°F
- Wettest September2013: 4.0 in
- Driest September2018: 0.4 in
- Highest reading83°F (September 1, 1991)
- Lowest reading17°F (September 29, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 74°F | 67°F | 54°F |
| Normal low | 41°F | 34°F | 25°F |
| Wet days | 11 | 9 | 7 |
| Comfortable days | 26 | 21 | 5 |
| Daylight | 13.7 h | 12.4 h | 11.2 h |
Highs change by -7°F from August and -13°F into October.
Nearby alternatives in September
- Warmer: Steamboat Springs, CO63 mi · high 74°F · 10 wet days
- Drier: Thornton, CO76 mi · high 80°F · 6 wet days
- Cooler: Breckenridge, CO21 mi · high 62°F · 10 wet days
How Vail ranks in September
- Normal high366th warmest of 378 cities; 16th of 17 in Colorado
- Wet days255th driest of 378
What to pack for Vail in September
- A warm jacket – lows near 34°F, highs near 67°F
- Layers – afternoons near 67°F but nights near 34°F
- A rain jacket or umbrella – rain or snow on about 9 days
Frost in September
The first fall frost typically comes around Sep 7; in 1 year in 10 it comes before Aug 26. All frost dates for Vail.
Heating and cooling
September has 441 heating degree days and 0 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How cold is Vail in September?
The normal high is 67°F and the normal low is 34°F. From 1991 to 2020 the coldest September reading was 17°F (September 29, 1999).
Does it rain a lot in Vail in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 2.0 in. The wettest September in 1991-2020 was in 2013 (4.0 in); the driest was in 2018 (0.4 in).
Does it snow in Vail in September?
Yes. Normal snowfall in September is 0.9 in, and snow covers the ground on about 1 day.
Is September a good time to visit Vail?
September ranks 4th of 12 months on our comfort score for Vail (76 out of 100). It has about 21 comfortable days (judged by temperature only). The best months are June and August.
Where the numbers come from
- Temperature, rain, snowfall and frost dates: Vail (USC00058575), 1.1 mi E of the city center, 8,304 ft (125 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Dillon 1 E (USC00052281), 18 mi E of the city center, 9,065 ft (886 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).