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
With the onset of September, Alva experiences a modest temperature adjustment, with the average high-temperature gently receding from a tropical 93°F (33.9°C) in August to a moderately hot 84.7°F (29.3°C). Alva sees an average low-temperature of 66°F (18.9°C) during September.Heat index
The heat index in September is estimated at a hot 87.8°F (31°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Note that heat index values are valued for light wind and location in the shade. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In September, the average relative humidity in Alva is 59%.Rainfall
In Alva, during September, the rain falls for 11.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in Alva, there are 105.5 rainfall days, and 18.11" (460mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Alva, Oklahoma.Daylight
In September, the average length of the day in Alva is 12h and 24min.On the first day of September, sunrise is at 7:06 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:19 pm CDT.
Sunshine
The average sunshine in September in Alva, Oklahoma, is 9.1h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 6 turns into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
How hot is it in Alva in September?
What is the average humidity in September in Alva?
How much does it rain in Alva in September?
When it does not snow in Alva?
Does it snow in Alva in September?
How many hours of daylight does Alva have in September?
When is the sunrise / sunset in September in Alva?
How long on average sun shines in September in Alva?
How high is the UV index in September in Alva?
Average temperature in September
Alva, OK
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is January (46.6°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Alva, OK
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Alva, OK
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (12mph).
The calmest month (with the lowest average wind speed) is August (9mph).
Average humidity in September
Alva, OK
- Average humidity in September: 59%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is July (53%).
Average rainfall in September
Alva, OK
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is May (3.43").
The driest months (with the least rainfall) are January, February, November and December (0.63").
Average rainfall days in September
Alva, OK
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (12.9 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
Alva, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Alva, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Alva, 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 1min
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 24min).
Average sunshine days in September
Alva, OK
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is September (15.5 days).
Average UV index in September
Alva, OK
- Average UV index in September: 6
The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Alva, OK
- Average cloud cover in September: 22
The months with the most cloud cover are March and April (Cloud cover 32).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Alva, 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).
Alva, Oklahoma, USA
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