September weather forecastDanbury, IA
September
Weather in September
September, the first month of the autumn in Danbury, is also a moderately hot month, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 74.1°F (23.4°C).Temperature
The average high-temperature shows a slight dip in September, from August's moderately hot 79.5°F (26.4°C) to a still warm 74.1°F (23.4°C). The average temperature during September nights is registered at a moderate 55.8°F (13.2°C).Humidity
In September, the average relative humidity is 74%.Rainfall
In Danbury, in September, it is raining for 8.8 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 97 rainfall days, and 10.12" (257mm) of precipitation is accumulated.Snowfall
In Danbury, snow does not fall in May through September.Daylight
In September, the average length of the day in Danbury is 12h and 28min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:05 pm CDT.
Sunshine
The average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Be vigilant - Suggestions to stave off sun damage are provided. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Danbury, IA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in September
Danbury, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Danbury, IA
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in September
Danbury, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (67%).
Average rainfall in September
Danbury, IA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (1.57").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in September
Danbury, IA
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is May (13.8 days).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in September
Danbury, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Danbury, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.7 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
Danbury, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Danbury, IA
- Average sunshine days in September: 19 days
The month with the most sunshine days is November (23 days).
The month with the least sunshine days is May (14.2 days).
Average UV index in September
Danbury, 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 February (UV index 1).
Average cloud cover in September
Danbury, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Danbury, IA
- 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).
