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
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a tropical 89.2°F (31.8°C) to a warm 82°F (27.8°C). During the nights in September, Spavinaw observes an average low-temperature of 62.4°F (16.9°C).Heat index
September's mean heat index is calculated to be a hot 87.8°F (31°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.In reference to the heat index, it's for places in shade and with a slight wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
The average relative humidity in September is 72%.Rainfall
In September, the rain falls for 9.7 days. Throughout September, 1.46" (37mm) of precipitation is accumulated. In Spavinaw, during the entire year, the rain falls for 112.7 days and collects up to 14.33" (364mm) of precipitation.Snowfall
In Spavinaw, snow does not fall in April, June through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:04 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Spavinaw, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
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?
What time are sunrise and sunset in September?
How many hours of sunshine does Spavinaw have in September?
What is the UV index intensity in September?
Average temperature in September
Spavinaw, OK
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.4°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in September
Spavinaw, OK
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Spavinaw, OK
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in September
Spavinaw, OK
- Average humidity in September: 72%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Spavinaw, OK
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is November (0.51").
Average rainfall days in September
Spavinaw, OK
- Average rainfall days in September: 9.7 days
The months with the highest number of rainy days are May and June (12.4 days).
The month with the least rainy days is December (4.9 days).
Average snowfall in September
Spavinaw, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Spavinaw, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Spavinaw, 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 July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Spavinaw, OK
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is April (14.8 days).
Average UV index in September
Spavinaw, 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
Spavinaw, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Spavinaw, 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).
Spavinaw, Oklahoma, USA
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