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
September's onset introduces a mild reduction in the average high-temperature, from 82°F (27.8°C) in August to a still moderately hot 76.1°F (24.5°C). Nighttime temperature dips to a mean of 56.3°F (13.5°C) during September.Humidity
In September, the average relative humidity is 76%.Rainfall
In Lamoni, in September, during 10.5 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Lamoni, during the entire year, the rain falls for 124.4 days and collects up to 21.42" (544mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Lamoni, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:58 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index in Lamoni is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
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?
How many hours of daylight does Lamoni have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Lamoni, IA
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in September
Lamoni, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Lamoni, IA
- Average wind speed in September: 7.8mph
The windiest months (with the highest average wind speed) are January, February and March (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Lamoni, IA
- Average humidity in September: 76%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Lamoni, IA
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is June (3.43").
The driest months (with the least rainfall) are January, February and December (0.71").
Average rainfall days in September
Lamoni, IA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Lamoni, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lamoni, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lamoni, IA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 2min
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 30min).
Average sunshine days in September
Lamoni, IA
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in September
Lamoni, 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
Lamoni, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in September
Lamoni, 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).
Lamoni, Iowa, USA
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