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 onset of September entails a subtle temperature shift, as the average high-temperature eases from a tropical 89.2°F (31.8°C) in August to a moderately hot 81.5°F (27.5°C). Frederick experiences a nighttime temperature average of 61.9°F (16.6°C) during September.Heat index
The heat index for September is computed to be 84.2°F (29°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In Frederick, the average relative humidity in September is 64%.Rainfall
In Frederick, in September, during 11.8 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Frederick, during the entire year, the rain falls for 115.5 days and collects up to 21.77" (553mm) of precipitation.Snowfall
In Frederick, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 7:03 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:28 am and sunset at 7:16 pm CDT.
Sunshine
The average sunshine in September in Frederick is 8.9h.UV index
In September, the average daily maximum UV index in Frederick is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. 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
What are the temperatures in Frederick in September?
What is the average humidity in September in Frederick?
How much does it rain in Frederick in September?
When it does not snow in Frederick?
Does it snow in Frederick in September?
What is the average length of the day in September in Frederick?
When are sunrise and sunset in September in Frederick?
How many hours of sunshine does Frederick have in September?
How high is the UV index in September in Frederick?
Average temperature in September
Frederick, KS
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (41.9°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in September
Frederick, KS
- 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
Frederick, KS
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Frederick, KS
- Average humidity in September: 64%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is July (59%).
Average rainfall in September
Frederick, KS
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Frederick, KS
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in September
Frederick, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Frederick, KS
- 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
Frederick, KS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The months with the least sunshine are January and December (Average sunshine: 6h and 12min).
Average sunshine days in September
Frederick, KS
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in September
Frederick, KS
- 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, November and December (UV index 2).
Average cloud cover in September
Frederick, KS
- Average cloud cover in September: 24
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is June (Cloud cover 20).
Average visibility in September
Frederick, KS
- 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, Kansas, USA
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