September weather forecastDenison, KS
September
Weather in September
September, the first month of the autumn in Denison, is still a warm month, with an average temperature fluctuating between 78.4°F (25.8°C) and 59.2°F (15.1°C).Temperature
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a warm 85.1°F (29.5°C) in August to a still moderately hot 78.4°F (25.8°C). During September nights, Denison witnesses a consistent average temperature of 59.2°F (15.1°C).Humidity
In Denison, the average relative humidity in September is 73%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 111.2 rainfall days, and 18.23" (463mm) of precipitation is accumulated.Snowfall
In Denison, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:06 pm CDT.
Sunshine
The average sunshine in September is 9h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. 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
Average temperature in September
Denison, KS
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Denison, KS
- Average pressure in September: 29.99"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
Denison, KS
- Average wind speed in September: 8.2mph
The windiest months (with the highest average wind speed) are March and April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in September
Denison, KS
- Average humidity in September: 73%
The months with the highest relative humidity are May and June (77%).
The months with the lowest relative humidity are October and November (68%).
Average rainfall in September
Denison, KS
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (2.8").
The driest months (with the least rainfall) are January and December (0.51").
Average rainfall days in September
Denison, KS
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in September
Denison, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Denison, 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 June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Denison, KS
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Denison, KS
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (24.1 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in September
Denison, KS
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Denison, KS
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Denison, 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).
