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 commencement of September in Alton, Kansas, includes a gentle temperature shift, with the average high-temperature dropping a bit from a tropical 89.8°F (32.1°C) in August to a warm 81.3°F (27.4°C). Alton records an average temperature drop to a refreshing 60.6°F (15.9°C) in September.Heat index
The heat index value for September is computed to be 84.2°F (29°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially crucial for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In September, the average relative humidity in Alton is 61%.Rainfall
In Alton, Kansas, in September, during 10.4 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 110.3 rainfall days, and 19.76" (502mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Alton is 12h and 26min.On the first day of September, sunrise is at 7:04 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:19 pm CDT.
Sunshine
In September, the average sunshine in Alton is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 5 during September leads to these instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Alton in September?
What is the average humidity in September in Alton?
How much does it rain in Alton in September?
When it does not snow in Alton?
Does it snow in Alton in September?
What is the average length of the day in September in Alton?
What time are sunrise and sunset in September in Alton?
How long on average sun shines in September in Alton?
How high is the UV index in September in Alton?
Average temperature in September
Alton, KS
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in September
Alton, KS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Alton, KS
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Alton, KS
- Average humidity in September: 61%
The months with the highest relative humidity are January and December (69%).
The month with the lowest relative humidity is July (57%).
Average rainfall in September
Alton, KS
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Alton, KS
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Alton, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alton, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alton, KS
- Average daylight in September: 12h and 2min
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: 8h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Alton, KS
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in September
Alton, 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, February, November and December (UV index 2).
Average cloud cover in September
Alton, KS
- Average cloud cover in September: 24
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 21).
Average visibility in September
Alton, 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).
Alton, Kansas, USA
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