September weather forecast
Evergreen, CO

Share
The beautiful hilly landscape of Evergreen, Colorado
The beautiful hilly landscape of Evergreen, Colorado

Weather in September

September in Evergreen brings the gentle whisper of autumn, as the heat of summer begins to wane. Rainfall decreases to 1.02" (26mm), hinting at crispier mornings and cooler evenings. Evergreen’s lush greens start to transform into shades of gold and red, setting the stage for autumn aesthetics. With October ahead, the anticipation of more distinct fall conditions accelerates, holding promises of a colorful cityscape. September’s flavor is a celebration of change, welcoming the city’s dance with fall foliage.

Temperature

The shift from August to September in Evergreen coincides with a small decrease in the average high-temperature, down to a pleasant 73°F (22.8°C) from a warm 79.3°F (26.3°C). Evergreen reports a substantial plunge from daytime highs during the nights of September, with an average low-temperature of 48.7°F (9.3°C).

Humidity

The average relative humidity in September is 45%.

Rainfall

In September, the rain falls for 11.8 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. Throughout the year, in Evergreen, Colorado, there are 141.9 rainfall days, and 17.32" (440mm) of precipitation is accumulated.

Snowfall

In Evergreen, Colorado, snow does not fall in June through September.

Daylight

In Evergreen, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:30 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm MDT.

Sunshine

The average sunshine in September is 11.1h.

UV index

In Evergreen, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
[Resources]

Frequently asked questions

What is the usual temperature for Evergreen in September?

The average high-temperature, in September, in Evergreen, is 73°F (22.8°C), while the average low-temperature is 48.7°F (9.3°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 80.6°F (27°C).

What is the average humidity in September in Evergreen?

The average relative humidity in September in Evergreen, Colorado, is 45%.

How much does it rain in Evergreen in September?

In Evergreen, in September, during 11.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When it does not snow in Evergreen?

June through September are months without snowfall in Evergreen, Colorado.

Does it snow in Evergreen in September?

In Evergreen, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Evergreen?

In Evergreen, Colorado, the average day length in September is 12h and 26min.

What time are sunrise and sunset in September in Evergreen?

On the first day of September in Evergreen, sunrise is at 6:30 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm MDT.

How many hours of sunshine does Evergreen have in September?

In Evergreen, the average sunshine duration in September is 11.1h.

What is the UV index intensity in September in Evergreen?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Evergreen, CO

Average temperature in September - Evergreen, CO
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is December (36.5°F).

  • Average low temperature in September: 48.7°F

The month with the highest average low temperature is July (56.3°F).
The coldest months (with the lowest average low temperature) are February and December (18.3°F).

[Resources]

Average pressure in September
Evergreen, CO

Average pressure in September - Evergreen, CO
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.92"Hg).

[Resources]

Average wind speed in September
Evergreen, CO

Average wind speed in September - Evergreen, CO
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is January (6.7mph).
The calmest month (with the lowest average wind speed) is September (5.4mph).

[Resources]

Average humidity in September
Evergreen, CO

Average humidity in September - Evergreen, CO
  • Average humidity in September: 45%

The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is June (43%).

[Resources]

Average rainfall in September
Evergreen, CO

Average rainfall in September - Evergreen, CO
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (0.59").

[Resources]

Average rainfall days in September
Evergreen, CO

Average rainfall days in September - Evergreen, CO
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is November (5 days).

[Resources]

Average snowfall in September
Evergreen, CO

Average snowfall in September - Evergreen, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is March (9.13").
The months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in September
Evergreen, CO

Average snowfall days in September - Evergreen, CO
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (12.2 days).
The months with the least snowfall days are June, July and August (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Evergreen, CO

Average daylight in September / Average sunshine in September - Evergreen, CO
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 11h and 1min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

[Resources]

Average sunshine days in September
Evergreen, CO

Average sunshine days in September - Evergreen, CO
  • Average sunshine days in September: 13.9 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (5.4 days).

[Resources]

Average UV index in September
Evergreen, CO

Average UV index in September - Evergreen, CO
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

[Resources]

Average cloud cover in September
Evergreen, CO

Average cloud cover in September - Evergreen, CO
  • Average cloud cover in September: 15

The months with the most cloud cover are April and May (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 15).

[Resources]

Average visibility in September
Evergreen, CO

Average visibility in September - Evergreen, CO
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Evergreen, Colorado, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location