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 signifies a gentle decline in Sheldon's average high-temperature, easing from 79.3°F (26.3°C) in August to a still warm 73.6°F (23.1°C). During September, Sheldon experiences an average low-temperature of 53.8°F (12.1°C) at night.Humidity
In Sheldon, the average relative humidity in September is 72%.Rainfall
In Sheldon, in September, during 11.9 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 128.1 rainfall days, and 24.17" (614mm) of precipitation is accumulated.Snowfall
In Sheldon, snow does not fall in June through September.Daylight
In Sheldon, Iowa, the average length of the day in September is 12h and 29min.On the first day of September in Sheldon, sunrise is at 6:48 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:05 pm CDT.
Sunshine
In Sheldon, 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 rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Sheldon in September?
What is the average humidity in September in Sheldon?
How much does it rain in Sheldon in September?
When it does not snow in Sheldon?
Does it snow in Sheldon in September?
What is the average length of the day in September in Sheldon?
What time are sunrise and sunset in September in Sheldon?
How long on average sun shines in September in Sheldon?
What is the UV index intensity in September in Sheldon?
Average temperature in September
Sheldon, IA
- Average high temperature in September: 73.6°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 (23.4°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in September
Sheldon, 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 (29.87"Hg).
Average wind speed in September
Sheldon, IA
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Sheldon, IA
- Average humidity in September: 72%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Sheldon, IA
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Sheldon, IA
- Average rainfall days in September: 11.9 days
The months with the highest number of rainy days are May and June (17.8 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in September
Sheldon, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sheldon, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sheldon, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Sheldon, IA
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in September
Sheldon, 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
Sheldon, 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 July (Cloud cover 28).
Average visibility in September
Sheldon, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Sheldon, Iowa, USA
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