September weather forecast
Greenwood, CO

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Weather in September

September, the first month of the autumn in Greenwood, is also a moderately hot month, with an average temperature varying between 77.5°F (25.3°C) and 55.6°F (13.1°C).

Temperature

As August transitions into September, Greenwood sees a gentle drop in the average high-temperature, transitioning from a warm 84.6°F (29.2°C) to a still moderately hot 77.5°F (25.3°C). September nights in Greenwood bring a pronounced temperature shift, with averages hovering around a mild 55.6°F (13.1°C).

Humidity

The average relative humidity in September is 44%.

Rainfall

In Greenwood, in September, it is raining for 11.4 days, with typically 1.1" (28mm) of accumulated precipitation. In Greenwood, Colorado, during the entire year, the rain falls for 120.5 days and collects up to 14.92" (379mm) of precipitation.

Snowfall

In Greenwood, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:44 pm MDT.

Sunshine

In Greenwood, Colorado, the average sunshine in September is 11h.

UV index

In Greenwood, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 5 in September leads to these guidelines:
Make use of precautions - It is urged to ward off sun damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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Frequently asked questions

What is the average September temperature in Greenwood?

Greenwood in September has an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 55.6°F (13.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is appraised at 84.2°F (29°C).

What is the average humidity in September in Greenwood?

In September, the average relative humidity in Greenwood, Colorado, is 44%.

How much does it rain in Greenwood in September?

In September, in Greenwood, Colorado, the rain falls for 11.4 days. Throughout September, 1.1" (28mm) of precipitation is accumulated.

When it does not snow in Greenwood?

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

Does it snow in Greenwood in September?

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

How many hours of daylight does Greenwood have in September?

In September, the average day length in Greenwood, Colorado, is 12h and 25min.

What time are sunrise and sunset in September in Greenwood?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm MDT.

How long on average sun shines in September in Greenwood?

The average sunshine duration in September in Greenwood is 11h.

What is the UV index intensity in September in Greenwood?

In Greenwood, the average daily maximum UV index in September is 5. 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
Greenwood, CO

Average temperature in September - Greenwood, CO
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (41.5°F).

  • Average low temperature in September: 55.6°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (23°F).

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Average pressure in September
Greenwood, CO

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

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).

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Average wind speed in September
Greenwood, CO

Average wind speed in September - Greenwood, CO
  • Average wind speed in September: 6.8mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in September
Greenwood, CO

Average humidity in September - Greenwood, CO
  • Average humidity in September: 44%

The month with the highest relative humidity is February (62%).
The month with the lowest relative humidity is June (38%).

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Average rainfall in September
Greenwood, CO

Average rainfall in September - Greenwood, CO
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is November (0.43").

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Average rainfall days in September
Greenwood, CO

Average rainfall days in September - Greenwood, CO
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is November (3.9 days).

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Average snowfall in September
Greenwood, CO

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

The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Greenwood, CO

Average snowfall days in September - Greenwood, CO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).

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Average sunshine days in September
Greenwood, CO

Average sunshine days in September - Greenwood, CO
  • Average sunshine days in September: 13 days

The month with the most sunshine days is November (23.8 days).
The month with the least sunshine days is July (5.1 days).

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Average UV index in September
Greenwood, CO

Average UV index in September - Greenwood, CO
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Greenwood, CO

Average cloud cover in September - Greenwood, CO
  • Average cloud cover in September: 14

The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June and September (Cloud cover 14).

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Average visibility in September
Greenwood, CO

Average visibility in September - Greenwood, 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).

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Greenwood, Colorado, USA

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