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
The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Sibley, during the month of September, experiences an average low-temperature of 53.6°F (12°C).Humidity
In Sibley, the average relative humidity in September is 72%.Rainfall
In Sibley, during September, the rain falls for 11.1 days and regularly aggregates up to 2.09" (53mm) of precipitation. In Sibley, during the entire year, the rain falls for 122.3 days and collects up to 22.24" (565mm) of precipitation.Snowfall
June through September are months without snowfall in Sibley.Daylight
In September, the average length of the day in Sibley is 12h and 29min.On the first day of September in Sibley, sunrise is at 6:47 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 September, the average sunshine in Sibley is 9h.UV index
In September, the average daily maximum UV index in Sibley is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Sibley?
What is the average humidity in September in Sibley?
How much does it rain in Sibley in September?
When it does not snow in Sibley?
Does it snow in Sibley in September?
How many hours of daylight does Sibley have in September?
When are sunrise and sunset in September in Sibley?
How many hours of sunshine does Sibley have in September?
What is the UV index intensity in September in Sibley?
Average temperature in September
Sibley, IA
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in September
Sibley, 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
Sibley, IA
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in September
Sibley, IA
- Average humidity in September: 72%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Sibley, IA
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Sibley, IA
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Sibley, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sibley, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sibley, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- 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 0min).
Average sunshine days in September
Sibley, IA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in September
Sibley, 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
Sibley, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Sibley, 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).
Sibley, Iowa, USA
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