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
In September, the average high-temperature decreases from a fiery hot 95.5°F (35.3°C) in August to a hot 86.2°F (30.1°C). Sterling experiences an average temperature drop to a refreshing 67.1°F (19.5°C) during September nights.Heat index
The heat index for September is evaluated at a tropical 91.4°F (33°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', comes about by integrating the temperature readings with the humidity levels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
In September, the average relative humidity is 62%.Rainfall
In Sterling, in September, it is raining for 12.6 days, with typically 2.28" (58mm) of accumulated precipitation. Throughout the year, there are 110.6 rainfall days, and 21.65" (550mm) of precipitation is accumulated.Snowfall
In Sterling, snow does not fall in May through October.Daylight
In Sterling, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:06 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:17 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, a regular UV index of 6 translates into these guidelines:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get 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 many hours of sunshine does Sterling have in September?
How high is the UV index in September?
Average temperature in September
Sterling, OK
- Average high temperature in September: 86.2°F
The warmest months (with the highest average high temperature) are July and August (95.5°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in September: 67.1°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 (33.4°F).
Average pressure in September
Sterling, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Sterling, OK
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in September
Sterling, OK
- Average humidity in September: 62%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Sterling, OK
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days in September
Sterling, OK
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Sterling, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Sterling, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Sterling, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Sterling, OK
- Average sunshine days in September: 15 days
The month with the most sunshine days is January (25.3 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in September
Sterling, 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
Sterling, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Sterling, 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).
Sterling, Oklahoma, USA
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