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 advent of September brings a subtle shift in temperature, with the average high moving from a tropical 91.9°F (33.3°C) in August to a moderately hot 84.9°F (29.4°C). Vian observes an average low-temperature of 64°F (17.8°C) during September nights.Heat index
Throughout September, the heat index is estimated at a tropical 93.2°F (34°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a single figure representing how weather conditions feel when combining temperature and humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
In September, the average relative humidity is 70%.Rainfall
In Vian, during September, the rain falls for 12.5 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Vian, during the entire year, the rain falls for 149.8 days and collects up to 34.76" (883mm) of precipitation.Snowfall
In Vian, snow does not fall in April through October.Daylight
In Vian, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:04 pm CDT.
Sunshine
In Vian, the average sunshine in September is 9.3h.UV index
In Vian, Oklahoma, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot does it get in Vian in September?
What is the average humidity in September in Vian?
How many days does it rain in September in Vian?
When it does not snow in Vian?
How many hours of daylight does Vian have in September?
When are sunrise and sunset in September in Vian?
How many hours of sunshine does Vian have in September?
What is the UV index reading in September in Vian?
Average temperature in September
Vian, OK
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in September
Vian, OK
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Vian, OK
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity in September
Vian, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Vian, OK
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is May (4.69").
The driest months (with the least rainfall) are January and February (2.09").
Average rainfall days in September
Vian, OK
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Vian, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Vian, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Vian, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Vian, OK
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is May (12 days).
Average UV index in September
Vian, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Vian, OK
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Vian, OK
- 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).
Vian, Oklahoma, USA
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