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
A mild shift in the average high-temperature occurs in September, reducing from a hot 91.9°F (33.3°C) in August to a moderately hot 84.4°F (29.1°C). Optima, during the month of September, experiences an average low-temperature of 63°F (17.2°C).Heat index
For most parts of September, the heat index is evaluated at a tropical 86°F (30°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Realize that the values for the heat index are set for shaded places and light winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
In Optima, the average relative humidity in September is 50%.Rainfall
In Optima, in September, during 9.9 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 88.2 rainfall days, and 13.39" (340mm) of precipitation is accumulated.Snowfall
In Optima, Oklahoma, snow does not fall in May through September.Daylight
In Optima, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 7:17 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:40 am and sunset at 7:29 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
How hot is it in Optima in September?
What is the average humidity in September in Optima?
How much does it rain in Optima in September?
When it does not snow in Optima?
Does it snow in Optima in September?
How many hours of daylight does Optima have in September?
When are sunrise and sunset in September in Optima?
How many hours of sunshine does Optima have in September?
How high is the UV index in September in Optima?
Average temperature in September
Optima, OK
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (47.7°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (72.1°F).
The coldest months (with the lowest average low temperature) are January and December (28.9°F).
Average pressure in September
Optima, OK
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Optima, OK
- Average wind speed in September: 12.1mph
The windiest month (with the highest average wind speed) is June (13.4mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).
Average humidity in September
Optima, OK
- Average humidity in September: 50%
The month with the highest relative humidity is December (56%).
The month with the lowest relative humidity is June (44%).
Average rainfall in September
Optima, OK
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is November (0.35").
Average rainfall days in September
Optima, OK
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (2.5 days).
Average snowfall in September
Optima, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Optima, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.8 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
Optima, 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: 9h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Optima, OK
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (25.5 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Optima, OK
- Average UV index in September: 6
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
Optima, OK
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 26).
The month with the least cloud cover is June (Cloud cover 15).
Average visibility in September
Optima, 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).
Optima, Oklahoma, USA
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