September weather forecastGreenwood Village, CO
September
Weather in September
September marks the onset of autumn in Greenwood Village, characterized by a drop in temperature to 78.1°F (25.6°C). The month experiences a decline in rainfall, transforming the landscape into a palette of warm colors. The daylight hours decrease as the fall equinox takes place, signalling shorter days to come. Even the wind speeds take a plunge, allowing for calm, peaceful autumn evenings. Despite having fewer sunshine hours than August, it's still a bright, beautiful month, perfect for harvest festivals.Temperature
The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 85.1°F (29.5°C) to a still warm 78.1°F (25.6°C). Greenwood Village's temperature exhibits a stark contrast from daytime to nighttime, averaging lows of 52.7°F (11.5°C) in September.Humidity
In September, the average relative humidity is 42%.Rainfall
In September, the rain falls for 3.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 50.6 rainfall days, and 2.91" (74mm) of precipitation is accumulated.Snowfall
In Greenwood Village, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:28 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm MDT.
Sunshine
In Greenwood Village, the average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Be vigilant - Suggestions to stave off sun damage are provided. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenwood Village, CO
- Average high temperature in September: 78.1°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°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (21°F).
Average pressure in September
Greenwood Village, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in September
Greenwood Village, CO
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest months (with the lowest average wind speed) are August, September and December (6.2mph).
Average humidity in September
Greenwood Village, CO
- Average humidity in September: 42%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (41%).
Average rainfall in September
Greenwood Village, CO
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is July (0.51").
The driest months (with the least rainfall) are January and December (0.08").
Average rainfall days in September
Greenwood Village, CO
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is July (8.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Greenwood Village, CO
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Greenwood Village, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenwood Village, CO
- Average daylight in September: 12h and 24min
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 6min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days in September
Greenwood Village, CO
- Average sunshine days in September: 23.7 days
The month with the most sunshine days is December (28.3 days).
The month with the least sunshine days is July (19.7 days).
Average UV index in September
Greenwood Village, 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).
Average cloud cover in September
Greenwood Village, CO
- Average cloud cover in September: 14
The month with the most cloud cover is April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in September
Greenwood Village, 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).
