Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In September, the average high-temperature in Lone Tree marginally drops from a warm 84.4°F (29.1°C) in August to a still moderately hot 77.7°F (25.4°C). Lone Tree registers a prominent dip from daytime highs, with an average of 52.5°F (11.4°C) during the nights of September.Humidity
The months with the lowest humidity are June, August and September, with an average relative humidity of 43%.Rainfall
The month with the least rainfall is September, when the rain falls for 6.5 days and typically collects 0.47" (12mm) of precipitation.Snowfall
In Lone Tree, Colorado, snow does not fall in June through September.Daylight
In Lone Tree, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:30 pm. On the last day of September, in Lone Tree, sunrise is at 6:55 am and sunset at 6:43 pm MDT.
Sunshine
In September, the average sunshine is 11h.UV index
The average daily maximum UV index in September in Lone Tree is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Make use of precautions - It is urged to ward off sun damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the temperature in September in Lone Tree?
What are the least humid months in Lone Tree?
What is the average humidity in September in Lone Tree?
What is the driest month in Lone Tree?
How many days does it rain in September in Lone Tree?
When it does not snow in Lone Tree?
Does it snow in Lone Tree in September?
What is the average length of the day in September in Lone Tree?
When are sunrise and sunset in September in Lone Tree?
How many hours of sunshine does Lone Tree have in September?
How high is the UV index in September in Lone Tree?
Average temperature in September
Lone Tree, CO
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (40.3°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in September
Lone Tree, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in September
Lone Tree, CO
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest months (with the lowest average wind speed) are August and December (6.5mph).
Average humidity in September
Lone Tree, CO
- Average humidity in September: 43%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June, August and September (43%).
Average rainfall in September
Lone Tree, CO
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Lone Tree, CO
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is November (3.4 days).
Average snowfall in September
Lone Tree, CO
- Average snowfall in September: 0"
The month with the highest snowfall is April (6.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lone Tree, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lone Tree, 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 0min
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 48min).
Average sunshine days in September
Lone Tree, CO
- Average sunshine days in September: 21 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in September
Lone Tree, 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
Lone Tree, CO
- Average cloud cover in September: 15
The month with the most cloud cover is April (Cloud cover 26).
The months with the least cloud cover are June and September (Cloud cover 15).
Average visibility in September
Lone Tree, 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).
Lone Tree, Colorado, USA
Weather forecast for your location
2. Allow the app to use your location
