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 start of September comes with a reduction in the average high-temperature, receding from a very hot 96.6°F (35.9°C) in August to a tropical 86.9°F (30.5°C). September witnesses an average nighttime temperature of 68.4°F (20.2°C).Heat index
Throughout September, the heat index is appraised at a hot 93.2°F (34°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The average relative humidity in September is 59%.Rainfall
In Frederick, in September, during 12 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 102.6 rainfall days, and 20.55" (522mm) of precipitation is accumulated.Snowfall
In Frederick, snow does not fall in May through October.Daylight
In Frederick, Oklahoma, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:09 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:21 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Frederick, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 6 in September translates into these instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Frederick have in September?
What is the UV index intensity in September in Frederick?
Average temperature in September
Frederick, OK
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (96.8°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in September: 68.4°F
The month with the highest average low temperature is July (76.6°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Frederick, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Frederick, OK
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest months (with the lowest average wind speed) are August and September (8.8mph).
Average humidity in September
Frederick, OK
- Average humidity in September: 59%
The months with the highest relative humidity are May and December (62%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Frederick, OK
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is November (0.79").
Average rainfall days in September
Frederick, OK
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Frederick, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Frederick, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Frederick, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Frederick, OK
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (25.5 days).
The month with the least sunshine days is September (15.9 days).
Average UV index in September
Frederick, OK
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Frederick, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are June and August (Cloud cover 18).
Average visibility in September
Frederick, 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).
Frederick, Oklahoma, USA
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