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
With the onset of September, Atalissa experiences a modest temperature adjustment, with the average high-temperature gently receding from a warm 80.6°F (27°C) in August to a still moderately hot 75.2°F (24°C). Atalissa, in the month of September, anticipates a consistent average low-temperature of 56.1°F (13.4°C).Humidity
In September, the average relative humidity in Atalissa, Iowa, 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 Atalissa, snow does not fall in May through September.Daylight
The average length of the day in September in Atalissa is 12h and 28min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:37 pm. On the last day of September, in Atalissa, sunrise is at 7:01 am and sunset at 6:47 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 in September translates into this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What are September temperatures in Atalissa?
What is the average humidity in September in Atalissa?
How much does it rain in Atalissa in September?
When it does not snow in Atalissa?
Does it snow in Atalissa in September?
How many hours of daylight does Atalissa have in September?
When are sunrise and sunset in September in Atalissa?
How long on average sun shines in September in Atalissa?
How high is the UV index in September in Atalissa?
Average temperature in September
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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
Atalissa, 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).
Atalissa, Iowa, USA
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