September weather forecastCyril, OK
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Cyril, Oklahoma, with an average temperature varying between 66.2°F (19°C) and 85.5°F (29.7°C).Temperature
Cyril in September experiences a subtle temperature decline, with average high-temperatures reducing from a hot 94.6°F (34.8°C) in August to a warm 85.5°F (29.7°C). September nights are marked by an average low-temperature of 66.2°F (19°C).Heat index
September's heat index is estimated at a tropical 91.4°F (33°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in September is 63%.Rainfall
In Cyril, during September, the rain falls for 10.3 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Cyril, during the entire year, the rain falls for 89.3 days and collects up to 11.1" (282mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Cyril, sunrise is at 7:06 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:17 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cyril, OK
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is July (94.8°F).
The month with the lowest average high temperature is January (50.4°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).
Average pressure in September
Cyril, OK
- Average pressure in September: 29.97"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
Cyril, OK
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Cyril, OK
- Average humidity in September: 63%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Cyril, OK
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is February (0.28").
Average rainfall days in September
Cyril, OK
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in September
Cyril, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Cyril, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Cyril, OK
- Average daylight in September: 12h and 24min
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 54min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Cyril, OK
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is January (26.6 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in September
Cyril, 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
Cyril, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Cyril, 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).
