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 witnesses a gentle descent in average high-temperature, descending from August's hot 87.1°F (30.6°C) to a warm 80.4°F (26.9°C). Sullivan, in the month of September, anticipates a consistent average low-temperature of 58.8°F (14.9°C).Humidity
In Sullivan, the average relative humidity in September is 74%.Rainfall
In Sullivan, in September, it is raining for 12.7 days, with typically 1.93" (49mm) of accumulated precipitation. In Sullivan, Missouri, during the entire year, the rain falls for 149.6 days and collects up to 32.05" (814mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Sullivan is 12h and 25min.On the first day of September in Sullivan, sunrise is at 6:34 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:48 pm CDT.
Sunshine
The average sunshine in September in Sullivan is 9.6h.UV index
In Sullivan, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Sullivan in September?
What is the average humidity in September in Sullivan?
How many days does it rain in September in Sullivan?
When it does not snow in Sullivan?
What is the average length of the day in September in Sullivan?
What time are sunrise and sunset in September in Sullivan?
How many hours of sunshine does Sullivan have in September?
How high is the UV index in September in Sullivan?
Average temperature in September
Sullivan, MO
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Sullivan, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Sullivan, MO
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Sullivan, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Sullivan, MO
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in September
Sullivan, MO
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
Sullivan, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Sullivan, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sullivan, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 4min
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
Sullivan, MO
- Average sunshine days in September: 15 days
The month with the most sunshine days is January (19.1 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Sullivan, MO
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sullivan, MO
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in September
Sullivan, MO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Sullivan, Missouri, USA
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