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
Colby observes a small decrease in the average high-temperature with the arrival of September, falling from August's tropical 88.7°F (31.5°C) to a moderately hot 81.1°F (27.3°C). Colby observes an average low-temperature of 59.9°F (15.5°C) during September nights.Heat index
September's heat index is appraised at 82.4°F (28°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.For clarity, heat index numbers account for light winds and areas under shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In Colby, the average relative humidity in September is 53%.Rainfall
In Colby, in September, during 8.4 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Colby, during the entire year, the rain falls for 93.4 days and collects up to 13.39" (340mm) of precipitation.Snowfall
In Colby, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 7:13 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 7:27 pm CDT.
Sunshine
In Colby, Kansas, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Colby have in September?
How high is the UV index in September?
Average temperature in September
Colby, KS
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (41.4°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is December (25°F).
Average pressure in September
Colby, KS
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Colby, KS
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in September
Colby, KS
- Average humidity in September: 53%
The months with the highest relative humidity are January and December (64%).
The month with the lowest relative humidity is July (51%).
Average rainfall in September
Colby, KS
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in September
Colby, KS
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is December (2.4 days).
Average snowfall in September
Colby, KS
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Colby, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Colby, 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: 9h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Colby, KS
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is December (25 days).
The month with the least sunshine days is July (14.5 days).
Average UV index in September
Colby, 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
Colby, KS
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is June (Cloud cover 19).
Average visibility in September
Colby, 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).
Colby, Kansas, USA
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