September weather forecastOlathe, CO
September
Weather in September
September, the first month of the autumn in Olathe, is also a moderately hot month, with temperature in the range of an average low of 48.9°F (9.4°C) and an average high of 74.7°F (23.7°C).Temperature
During the shift to September, a minor reduction in average high-temperature is observed, shifting from 82°F (27.8°C) in August to a still moderately hot 74.7°F (23.7°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 48.9°F (9.4°C).Humidity
In Olathe, the average relative humidity in September is 43%.Rainfall
In Olathe, in September, it is raining for 9.5 days, with typically 0.94" (24mm) of accumulated precipitation. In Olathe, during the entire year, the rain falls for 111.1 days and collects up to 10.43" (265mm) of precipitation.Snowfall
In Olathe, snow does not fall in June through September.Daylight
In September, the average length of the day in Olathe, Colorado, is 12h and 25min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:41 pm. On the last day of September, in Olathe, sunrise is at 7:07 am and sunset at 6:55 pm MDT.
Sunshine
The average sunshine in September in Olathe, Colorado, is 11h.UV index
In Olathe, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Olathe, CO
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Olathe, CO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is May (29.91"Hg).
Average wind speed in September
Olathe, CO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is June (7.3mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Olathe, CO
- Average humidity in September: 43%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (31%).
Average rainfall in September
Olathe, CO
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is July (1.14").
The driest month (with the least rainfall) is June (0.59").
Average rainfall days in September
Olathe, CO
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is November (7 days).
Average snowfall in September
Olathe, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Olathe, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Olathe, CO
- Average daylight in September: 12h and 24min
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: 11h and 0min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).
Average sunshine days in September
Olathe, CO
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in September
Olathe, CO
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Olathe, CO
- Average cloud cover in September: 12
The months with the most cloud cover are January and February (Cloud cover 30).
The month with the least cloud cover is June (Cloud cover 11).
Average visibility in September
Olathe, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
