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
Westport's progression into September involves a gentle drop in the average high-temperature, from a hot 90.3°F (32.4°C) in August to a moderately hot 83.3°F (28.5°C). Throughout the month of September, the nighttime temperature dips to an average of 63.9°F (17.7°C).Heat index
In September, the average heat index is estimated at a tropical 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in September is 70%.Rainfall
In September, the rain falls for 10 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, in Westport, there are 108.2 rainfall days, and 16.69" (424mm) of precipitation is accumulated.Snowfall
In Westport, snow does not fall in April through October.Daylight
In Westport, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:57 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:09 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index in Westport is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 5 transforms into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Westport have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Westport, OK
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in September
Westport, OK
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Westport, OK
- Average wind speed in September: 7.6mph
The windiest months (with the highest average wind speed) are March and April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in September
Westport, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is January (66%).
Average rainfall in September
Westport, OK
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Westport, OK
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (4.6 days).
Average snowfall in September
Westport, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Westport, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Westport, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Westport, OK
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is December (24.2 days).
The month with the least sunshine days is May (15.2 days).
Average UV index in September
Westport, 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
Westport, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Westport, 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).
Westport, Oklahoma, USA
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