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
September's onset brings a negligible change in high-temperatures, falling from a tropical 88.9°F (31.6°C) in August to a warm 82°F (27.8°C). Bartlesville cools down to an average low-temperature of 62.8°F (17.1°C) throughout the month of September.Heat index
September's average heat index is estimated at a tropical 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. 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 Bartlesville, the average relative humidity in September is 71%.Rainfall
In Bartlesville, in September, it is raining for 12 days, with typically 2.83" (72mm) of accumulated precipitation. In Bartlesville, during the entire year, the rain falls for 131.6 days and collects up to 29.06" (738mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:55 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Bartlesville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Bartlesville?
What is the UV index reading in September?
Average temperature in September
Bartlesville, OK
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in September
Bartlesville, OK
- Average pressure in September: 29.99"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
Bartlesville, OK
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is March (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Bartlesville, OK
- Average humidity in September: 71%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, October and November (68%).
Average rainfall in September
Bartlesville, OK
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is May (5.08").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in September
Bartlesville, OK
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Bartlesville, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Bartlesville, 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 April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Bartlesville, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in September
Bartlesville, OK
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Bartlesville, OK
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Bartlesville, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Bartlesville, 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).
Bartlesville, Oklahoma, USA
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