Estes Park Weather in September
September in Estes Park brings pleasant temperatures, with daytime highs of 21°C (70°F) and nights around 5°C (41°F). The perfect weather makes it a solid choice for a visit.
Rainfall in Estes Park in September
Analyzing past climate data, one can expect approximately 10 days of rain, averaging 50 mm (2 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Estes Park in September
If you're visiting Estes Park in September, expect perfect temperatures with highs of 21°C (70°F) and overnight lows of 5°C (41°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Estes Park's climate page.
Estes Park Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
21°C (70°F)
Chance of Rain
33%
Precipitation
50 mm (2 in)
Rainy days
10 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Estes Park typically drop from around 28°C (82°F) at the start of September to approximately 23°C (73°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 13°C (55°F).
Average temperatures in September
Historical weather for Estes Park in September
Browse day-by-day weather records for Estes Park spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Estes Park historical weather extremes in September
Based on weather observations in Estes Park between 1997 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 2, 2019, with a maximum of 39°C (102°F).
- Nighttime temperatures dropped to -1°C (30°F) on September 24, 2000, marking the coldest September night on record.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Estes Park in September
For Estes Park in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket.What To Do in Estes Park in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Estes Park's climate page.
See the full Estes Park climate overview or explore weather in the United States of America.
