September weather forecastHollis, OK
September
Weather in September
The first month of the autumn, September, is still a tropical month in Hollis, Oklahoma, with an average temperature ranging between max 86.5°F (30.3°C) and min 67.6°F (19.8°C).Temperature
September's onset introduces a mild reduction in the average high-temperature, from a fiery hot 95.5°F (35.3°C) in August to a tropical 86.5°F (30.3°C). The nighttime temperature in Hollis, during September, averages of 67.6°F (19.8°C).Heat index
The average heat index in September is estimated at a hot 91.4°F (33°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.Observations indicate that the heat index values are for shady locations with light wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In September, the average relative humidity is 56%.Rainfall
In Hollis, in September, it is raining for 11.4 days, with typically 2.28" (58mm) of accumulated precipitation. In Hollis, during the entire year, the rain falls for 95 days and collects up to 18.94" (481mm) of precipitation.Snowfall
In Hollis, snow does not fall in May through October.Daylight
In Hollis, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:13 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:34 am and sunset at 7:24 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hollis, OK
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The months with the lowest average high temperature are January and December (52.5°F).
- Average low temperature in September: 67.6°F
The month with the highest average low temperature is July (76.1°F).
The coldest month (with the lowest average low temperature) is January (33.8°F).
Average pressure in September
Hollis, 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
Hollis, OK
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is April (13mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).
Average humidity in September
Hollis, OK
- Average humidity in September: 56%
The month with the highest relative humidity is December (57%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Hollis, OK
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in September
Hollis, OK
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in September
Hollis, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Hollis, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.6 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
Hollis, OK
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Hollis, OK
- Average sunshine days in September: 16 days
The month with the most sunshine days is January (26.3 days).
The month with the least sunshine days is September (16 days).
Average UV index in September
Hollis, OK
- Average UV index in September: 6
The month with the highest UV index is June (UV index 8).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Hollis, OK
- Average cloud cover in September: 23
The month with the most cloud cover is April (Cloud cover 27).
The month with the least cloud cover is June (Cloud cover 16).
Average visibility in September
Hollis, 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).
