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 arrival of September correlates with a minor temperature reduction, down from August's tropical 90.3°F (32.4°C) to a moderately hot 82.8°F (28.2°C). Lewis reports an average low-temperature of 61.7°F (16.5°C) during the nights of September.Heat index
Throughout September, the heat index is estimated at a hot 86°F (30°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In September, the average relative humidity is 60%.Rainfall
In Lewis, during September, the rain falls for 9.9 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in Lewis, there are 93.5 rainfall days, and 15.63" (397mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 7:07 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:21 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Lewis have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Lewis, KS
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is December (43.9°F).
- Average low temperature in September: 61.7°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 (26.4°F).
Average pressure in September
Lewis, KS
- 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 (29.84"Hg).
Average wind speed in September
Lewis, KS
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is April (13.2mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in September
Lewis, KS
- Average humidity in September: 60%
The month with the highest relative humidity is December (64%).
The month with the lowest relative humidity is July (55%).
Average rainfall in September
Lewis, KS
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Lewis, KS
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in September
Lewis, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lewis, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Lewis, 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 36min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The months with the least sunshine are January and December (Average sunshine: 6h and 24min).
Average sunshine days in September
Lewis, KS
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is December (25.6 days).
The month with the least sunshine days is May (16.3 days).
Average UV index in September
Lewis, 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
Lewis, KS
- Average cloud cover in September: 23
The month with the most cloud cover is April (Cloud cover 33).
The month with the least cloud cover is June (Cloud cover 18).
Average visibility in September
Lewis, 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).
Lewis, Kansas, USA
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