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
As Frisco enters September, the average high-temperature subtly lowers from the a comfortable 65.5°F (18.6°C) of August to a mild 59°F (15°C). Compared to daytime temperatures, Frisco's temperature drops significantly, averaging a cold 33.8°F (1°C) during the nights of September.Humidity
The average relative humidity in September is 58%.Rainfall
In Frisco, in September, during 9 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Frisco, during the entire year, the rain falls for 74.4 days and collects up to 14.96" (380mm) of precipitation.Snowfall
January through December are months with snowfall. In Frisco, during September, snow falls for 3.5 days and regularly aggregates up to 1.26" (32mm) of snow. In Frisco, during the entire year, snow falls for 99.6 days and aggregates up to 68.54" (1741mm) of snow.Daylight
In Frisco, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:47 pm MDT.
Sunshine
In Frisco, the average sunshine in September is 10.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
How much does it snow in September?
How many hours of daylight does Frisco have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in Frisco?
Average temperature in September
Frisco, CO
- Average high temperature in September: 59°F
The warmest month (with the highest average high temperature) is July (67.1°F).
The month with the lowest average high temperature is December (22.6°F).
- Average low temperature in September: 33.8°F
The month with the highest average low temperature is July (40.6°F).
The coldest month (with the lowest average low temperature) is January (1.6°F).
Average pressure in September
Frisco, CO
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).
Average wind speed in September
Frisco, CO
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
Frisco, CO
- Average humidity in September: 58%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (53%).
Average rainfall in September
Frisco, CO
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (2.36").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Frisco, CO
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is July (19.3 days).
The months with the least rainy days are February and November (1.1 days).
Average snowfall in September
Frisco, CO
- Average snowfall in September: 1.26"
The month with the highest snowfall is May (12.4").
The month with the least snowfall is July (0.12").
Average snowfall days in September
Frisco, CO
- Average snowfall days in September: 3.5 days
The month with the highest number of snowfall days is May (13.8 days).
The month with the least snowfall days is July (0.9 days).
Average daylight in September /
Average sunshine in September
Frisco, CO
- 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: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Frisco, CO
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (8.7 days).
Average UV index in September
Frisco, CO
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Frisco, CO
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 18).
Average visibility in September
Frisco, CO
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Frisco, Colorado, USA
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