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 shift from August to September involves a decrease in the average high-temperature, from a sweltering 95.2°F (35.1°C) to a moderately hot 85.6°F (29.8°C). In the month of September, Willow records a consistent average low-temperature of 67.1°F (19.5°C).Heat index
The heat index value during September is computed to be a hot 89.6°F (32°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. 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 are highly critical for babies and toddlers. 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 58%.Rainfall
In Willow, in September, during 10.5 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. In Willow, during the entire year, the rain falls for 93.6 days and collects up to 18.27" (464mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Willow is 12h and 23min.On the first day of September, sunrise is at 7:11 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:22 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 5 in September transforms into this advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
How hot is September in Willow?
What is the average humidity in September in Willow?
How much does it rain in Willow in September?
When it does not snow in Willow?
How many hours of daylight does Willow have in September?
What time are sunrise and sunset in September in Willow?
How long on average sun shines in September in Willow?
How high is the UV index in September in Willow?
Average temperature in September
Willow, OK
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is July (96.1°F).
The month with the lowest average high temperature is December (50.9°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (75°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Willow, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Willow, OK
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (12.7mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in September
Willow, OK
- Average humidity in September: 58%
The months with the highest relative humidity are May and December (61%).
The months with the lowest relative humidity are July and August (50%).
Average rainfall in September
Willow, OK
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
Willow, OK
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in September
Willow, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Willow, 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
Willow, 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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Willow, OK
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is January (26.3 days).
The month with the least sunshine days is August (16 days).
Average UV index in September
Willow, OK
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Willow, OK
- Average cloud cover in September: 24
The months with the most cloud cover are March and April (Cloud cover 29).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Willow, 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).
Willow, Oklahoma, USA
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