Estes Park, CO weather in September
In September, Estes Park sees highs around 70°F and lows around 47°F: mild, with some rain and some snow. Expect about 9 wet days. Snowfall averages about 3.3 in. Great for outdoor plans.
- Normal high
- 70°F
- Normal low
- 47°F
- Wet days
- 9
- 1.6 in total
- Snowfall
- 3.3 in
- snow on the ground 1 day
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 75°F | 64°F |
| Normal low | 52°F | 41°F |
| Chance of a wet day | 34% | 27% |
| Sunrise / sunset | 6:29 am / 7:34 pm | 6:57 am / 6:46 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)19 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 in4 of 30
- Freezing nightslow 32°F or below2 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 1.6 in; a dry September brings about 0.8 in and a wet one about 1.8 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 3.3 in, with about 1 day of an inch or more.
How September varies from year to year
- Warmest September, 1991-20202015: average high 77°F
- Coolest September2006: average high 65°F
- Wettest September2013: 11.5 in
- Driest September2016: 0.3 in
- Highest reading95°F (September 5, 1995)
- Lowest reading18°F (September 22, 1995)
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 | 78°F | 70°F | 57°F |
| Normal low | 55°F | 47°F | 36°F |
| Wet days | 13 | 9 | 7 |
| Comfortable days | 16 | 19 | 11 |
| Daylight | 13.7 h | 12.4 h | 11.1 h |
Highs change by -8°F from August and -13°F into October.
Nearby alternatives in September
- Warmer: Fort Collins, CO27 mi · high 77°F · 7 wet days
- Drier: Thornton, CO46 mi · high 80°F · 6 wet days
- Cooler: Breckenridge, CO68 mi · high 62°F · 10 wet days
How Estes Park ranks in September
- Normal high350th warmest of 378 cities; 13th of 17 in Colorado
- Wet days233rd driest of 378
What to pack for Estes Park in September
- A rain jacket or umbrella – rain or snow on about 9 days
- Waterproof boots – about 3.3 in of snow in a typical year
Frost in September
The first fall frost typically comes around Sep 17; in 1 year in 10 it comes before Sep 3. All frost dates for Estes Park.
Heating and cooling
September has 225 heating degree days and 33 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Estes Park in September?
The normal high is 70°F and the normal low is 47°F. From 1991 to 2020 the hottest September reading was 95°F (September 5, 1995).
Does it rain a lot in Estes Park in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 1.7 in. The wettest September in 1991-2020 was in 2013 (11.5 in); the driest was in 2016 (0.3 in).
Does it snow in Estes Park in September?
Yes. Normal snowfall in September is 3.3 in, and snow covers the ground on about 1 day.
Is September a good time to visit Estes Park?
September ranks 2nd of 12 months on our comfort score for Estes Park (75 out of 100). It has about 19 comfortable days (judged by temperature only). The best month is June.
Where the numbers come from
- Temperature, snowfall and snow depth: Buckhorn Mtn 1 E (USC00051060), 20 mi NE of the city center, 7,400 ft (129 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain and frost dates: Estes Park 3 Sse (USC00052761), 2.0 mi S of the city center, 7,812 ft (283 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).