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
The start of September signals a gentle decrease in the average high-temperature, transitioning from a warm 80.6°F (27°C) in August to a still moderately hot 75.2°F (24°C). Lone Tree's average low-temperature in the month of September is recorded at a mild 56.1°F (13.4°C).Humidity
The average relative humidity in September is 76%.Rainfall
In September, the rain falls for 8.1 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 92.5 rainfall days, and 7.68" (195mm) of precipitation is accumulated.Snowfall
In Lone Tree, snow does not fall in May through September.Daylight
In Lone Tree, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:32 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine in Lone Tree is 9.3h.UV index
In Lone Tree, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Lone Tree?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / 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?
Average temperature in September
Lone Tree, IA
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in September
Lone Tree, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Lone Tree, IA
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Lone Tree, IA
- Average humidity in September: 76%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Lone Tree, IA
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is February (0.28").
Average rainfall days in September
Lone Tree, IA
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is June (13.2 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Lone Tree, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lone Tree, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lone Tree, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Lone Tree, IA
- Average sunshine days in September: 20.8 days
The month with the most sunshine days is December (24.4 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in September
Lone Tree, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Lone Tree, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Lone Tree, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Lone Tree, Iowa, USA
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