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
In September, the average high-temperature marginally drops from 82.6°F (28.1°C) in August to a still warm 76.6°F (24.8°C). Throughout the nights in September, Carter Lake experiences an average low-temperature of 57°F (13.9°C).Humidity
In Carter Lake, Iowa, the average relative humidity in September is 72%.Rainfall
In Carter Lake, in September, it is raining for 12 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 122.5 rainfall days, and 22.52" (572mm) of precipitation is accumulated.Snowfall
In Carter Lake, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Carter Lake, sunrise is at 6:50 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:06 pm CDT.
Sunshine
In September, the average sunshine in Carter Lake, Iowa, is 9h.UV index
In September, the average daily maximum UV index in Carter Lake is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Carter Lake in September?
What is the average humidity in September in Carter Lake?
How much does it rain in Carter Lake in September?
When it does not snow in Carter Lake?
Does it snow in Carter Lake in September?
What is the average length of the day in September in Carter Lake?
What time are sunrise and sunset in September in Carter Lake?
How many hours of sunshine does Carter Lake have in September?
What is the UV index intensity in September in Carter Lake?
Average temperature in September
Carter Lake, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 57°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 (16.3°F).
Average pressure in September
Carter Lake, IA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Carter Lake, IA
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in September
Carter Lake, IA
- Average humidity in September: 72%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Carter Lake, IA
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Carter Lake, IA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Carter Lake, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Carter Lake, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Carter Lake, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Carter Lake, IA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Carter Lake, 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
Carter Lake, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Carter Lake, 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).
Carter Lake, Iowa, USA
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