September weather forecastShawnee, CO
September
Weather in September
September, the first month of the autumn in Shawnee, is also an enjoyable month, with an average temperature ranging between min 41°F (5°C) and max 64.9°F (18.3°C).Temperature
September is characterized by a slight reduction in average high-temperature, easing from a pleasant 71.1°F (21.7°C) in August to a refreshing 64.9°F (18.3°C). Shawnee records a consistent low-temperature average of 41°F (5°C) during September, indicating a significant difference from the daytime heat.Humidity
In Shawnee, the average relative humidity in September is 52%.Rainfall
In September, the rain falls for 9.4 days. Throughout September, 0.55" (14mm) of precipitation is accumulated. Throughout the year, there are 96 rainfall days, and 10.08" (256mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In September, it is snowing for 1.5 days. Throughout September, 0.39" (10mm) of snow is accumulated. Throughout the year, there are 74.9 snowfall days, and 35.39" (899mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm MDT.
Sunshine
In Shawnee, the average sunshine in September is 10.6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 3 in September translates into this advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shawnee, CO
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is July (72.3°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in September: 41°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is February (11.3°F).
Average pressure in September
Shawnee, CO
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.92"Hg).
Average wind speed in September
Shawnee, CO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Shawnee, CO
- Average humidity in September: 52%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is June (50%).
Average rainfall in September
Shawnee, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is July (1.65").
The driest month (with the least rainfall) is December (0.28").
Average rainfall days in September
Shawnee, CO
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (2.2 days).
Average snowfall in September
Shawnee, CO
- Average snowfall in September: 0.39"
The month with the highest snowfall is March (6.73").
The months with the least snowfall are July and August (0.04").
Average snowfall days in September
Shawnee, CO
- Average snowfall days in September: 1.5 days
The month with the highest number of snowfall days is March (11.6 days).
The months with the least snowfall days are July and August (0.1 days).
Average daylight in September /
Average sunshine in September
Shawnee, CO
- 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: 10h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in September
Shawnee, CO
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Shawnee, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Shawnee, CO
- Average cloud cover in September: 21
The months with the most cloud cover are February, April and May (Cloud cover 35).
The month with the least cloud cover is June (Cloud cover 20).
Average visibility in September
Shawnee, CO
- 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).
