September weather forecastFlorissant, CO
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Florissant, Colorado, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 41.4°F (5.2°C).Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from an agreeable 73°F (22.8°C) to a comfortable 67.1°F (19.5°C). Despite the stark contrast with daytime temperatures, Florissant's September nights average at a cold 41.4°F (5.2°C).Humidity
In September, the average relative humidity is 53%.Rainfall
In September, the rain falls for 10.3 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in Florissant, there are 103.6 rainfall days, and 10.24" (260mm) of precipitation is accumulated.Snowfall
Months with snowfall in Florissant are January through June, September through December. September is the first month it typically snows in Florissant. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 64.3 snowfall days, and 24.57" (624mm) of snow is accumulated.Daylight
In September, the average length of the day in Florissant is 12h and 26min.On the first day of September in Florissant, sunrise is at 6:30 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm MDT.
Sunshine
In Florissant, the average sunshine in September is 10.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Florissant, CO
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 41.4°F
The month with the highest average low temperature is July (47.8°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Florissant, CO
- Average pressure in September: 30.04"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
Florissant, CO
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Florissant, CO
- Average humidity in September: 53%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is June (46%).
Average rainfall in September
Florissant, CO
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (2.17").
The driest month (with the least rainfall) is November (0.2").
Average rainfall days in September
Florissant, CO
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is November (2 days).
Average snowfall in September
Florissant, CO
- Average snowfall in September: 0.04"
The month with the highest snowfall is April (4.57").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Florissant, CO
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Florissant, 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 30min).
- Average sunshine in September: 10h and 54min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in September
Florissant, CO
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (24.2 days).
The month with the least sunshine days is July (8.3 days).
Average UV index in September
Florissant, CO
- Average UV index in September: 4
The month with the highest UV index is June (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Florissant, CO
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 30).
The months with the least cloud cover are June and October (Cloud cover 17).
Average visibility in September
Florissant, 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).
