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 transitions into September, the average high-temperature rests at a still moderately hot 76.6°F (24.8°C), maintaining a close resemblance to the previous month. During the month of September, the nighttime temperature falls to an average of 56.5°F (13.6°C).Humidity
In Emerson, the average relative humidity in September is 74%.Rainfall
In Emerson, Iowa, during September, the rain falls for 11.5 days and regularly aggregates up to 1.77" (45mm) of precipitation. Throughout the year, in Emerson, there are 117.2 rainfall days, and 21.77" (553mm) of precipitation is accumulated.Snowfall
In Emerson, snow does not fall in May through September.Daylight
In Emerson, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:49 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:04 pm CDT.
Sunshine
In September, the average sunshine in Emerson is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What are the temperatures in Emerson in September?
What is the average humidity in September in Emerson?
How many days does it rain in September in Emerson?
When it does not snow in Emerson?
Does it snow in Emerson in September?
What is the average length of the day in September in Emerson?
What time are sunrise and sunset in September in Emerson?
How many hours of sunshine does Emerson have in September?
What is the UV index intensity in September in Emerson?
Average temperature in September
Emerson, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Emerson, 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
Emerson, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Emerson, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Emerson, IA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in September
Emerson, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in September
Emerson, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Emerson, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Emerson, 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 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Emerson, IA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Emerson, IA
- 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, October, November and December (UV index 2).
Average cloud cover in September
Emerson, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Emerson, 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).
Emerson, Iowa, USA
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