September weather forecast
Frisco, CO

Weather in September

The first month of the autumn, September, is also a moderate month in Frisco, Colorado, with an average temperature ranging between max 59°F (15°C) and min 33.8°F (1°C).

Temperature

In Frisco, the average high-temperature in September marginally drops from an enjoyable 65.5°F (18.6°C) in August to a moderate 59°F (15°C). The average low-temperature, in September, is 33.8°F (1°C).

Humidity

In September, the average relative humidity is 58%.

Rainfall

In Frisco, during September, the rain falls for 9 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, there are 74.4 rainfall days, and 14.96" (380mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Frisco are January through December. In September, it is snowing for 3.5 days. Throughout September, 1.26" (32mm) of snow is accumulated. Throughout the year, there are 99.6 snowfall days, and 68.54" (1741mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:32 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:48 pm MDT.

Sunshine

In Frisco, the average sunshine in September is 10.9h.

UV index

In September, the average daily maximum UV index in Frisco is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Frisco?

The average high-temperature, in September, in Frisco, Colorado, is 59°F (15°C), while the average low-temperature is 33.8°F (1°C).

What is the average humidity in September in Frisco?

The average relative humidity in September in Frisco, Colorado, is 58%.

How much does it rain in Frisco in September?

In September, in Frisco, the rain falls for 9 days. Throughout September, 1.02" (26mm) of precipitation is accumulated.

How many days does it snow in September in Frisco?

In September, in Frisco, it is snowing for 3.5 days. Throughout September, 1.26" (32mm) of snow is accumulated.

What is the average length of the day in September in Frisco?

In Frisco, the average day length in September is 12h and 26min.

When are sunrise and sunset in September in Frisco?

On the first day of September in Frisco, sunrise is at 6:32 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:48 pm MDT.

How many hours of sunshine does Frisco have in September?

In September, the average sunshine duration in Frisco, Colorado, is 10.9h.

What is the UV index intensity in September in Frisco?

In Frisco, Colorado, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Frisco, CO

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).

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Average pressure in September
Frisco, CO

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).

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Average wind speed in September
Frisco, CO

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).

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Average humidity in September
Frisco, CO

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%).

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Average rainfall in September
Frisco, CO

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").

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Average rainfall days in September
Frisco, CO

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).

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Average snowfall in September
Frisco, CO

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").

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Average snowfall days in September
Frisco, CO

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).

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Average daylight in September /
Average sunshine in September
Frisco, CO

Average daylight in September / Average sunshine in September - Frisco, CO
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 55min).
The month with the shortest days is December (Average daylight: 9h and 26min).

  • Average sunshine in September: 10h and 54min

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).

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Average sunshine days in September
Frisco, CO

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).

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Average UV index in September
Frisco, CO

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).

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Average cloud cover in September
Frisco, CO

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).

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Average visibility in September
Frisco, CO

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).

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