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
As August makes way for September, Dundee's average high-temperature eases from a moderately hot 77.7°F (25.4°C) to a pleasant 72.1°F (22.3°C). Throughout September nights, Dundee experiences a consistent temperature average of 53.1°F (11.7°C).Humidity
In Dundee, the average relative humidity in September is 80%.Rainfall
In Dundee, during September, the rain falls for 11.9 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Dundee, during the entire year, the rain falls for 142.8 days and collects up to 30.55" (776mm) of precipitation.Snowfall
In Dundee, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September in Dundee, sunrise is at 6:31 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:48 pm CDT.
Sunshine
In Dundee, Iowa, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
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?
What time are sunrise and sunset in September?
How many hours of sunshine does Dundee have in September?
How high is the UV index in September?
Average temperature in September
Dundee, IA
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in September
Dundee, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Dundee, IA
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Dundee, IA
- Average humidity in September: 80%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Dundee, IA
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Dundee, IA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Dundee, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dundee, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dundee, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Dundee, IA
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in September
Dundee, IA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Dundee, IA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Dundee, IA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Dundee, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location