September weather forecast
Florence, CO

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Weather in September

September, the first month of the autumn in Florence, is still a pleasant month, with an average temperature fluctuating between 48.2°F (9°C) and 73.2°F (22.9°C).

Temperature

The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 79.7°F (26.5°C) in August to an agreeable 73.2°F (22.9°C). With a significant daily temperature differential, Florence's nighttime temperature in September falls to an average of 48.2°F (9°C).

Humidity

The average relative humidity in September is 47%.

Rainfall

In Florence, Colorado, during September, the rain falls for 10.1 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 108.6 rainfall days, and 10.83" (275mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Florence.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of September, in Florence, sunrise is at 6:56 am and sunset at 6:44 pm MDT.

Sunshine

In Florence, the average sunshine in September is 11.1h.

UV index

In Florence, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 4 translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. During bright days, sunglasses that offer UVA and UVB defense are recommended.
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Frequently asked questions

What is the temperature in September in Florence?

The average high-temperature, in September, in Florence, is 73.2°F (22.9°C), while the average low-temperature is 48.2°F (9°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 82.4°F (28°C).

What is the average humidity in September in Florence?

In Florence, the average relative humidity in September is 47%.

How many days does it rain in September in Florence?

In Florence, Colorado, during September, the rain falls for 10.1 days and regularly aggregates up to 0.79" (20mm) of precipitation.

When it does not snow in Florence?

June through September are months without snowfall.

Does it snow in Florence in September?

In Florence, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Florence have in September?

In Florence, Colorado, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Florence?

On the first day of September in Florence, Colorado, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm MDT.

How long on average sun shines in September in Florence?

In September, the average sunshine duration in Florence is 11.1h.

What is the UV index reading in September in Florence?

In September, the average daily maximum UV index in Florence is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Florence, CO

Average temperature in September - Florence, CO
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 48.2°F

The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).

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Average pressure in September
Florence, CO

Average pressure in September - Florence, CO
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).

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Average wind speed in September
Florence, CO

Average wind speed in September - Florence, CO
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are January, February and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in September
Florence, CO

Average humidity in September - Florence, CO
  • Average humidity in September: 47%

The months with the highest relative humidity are January and February (69%).
The month with the lowest relative humidity is June (40%).

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Average rainfall in September
Florence, CO

Average rainfall in September - Florence, CO
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is July (2.2").
The driest months (with the least rainfall) are January and November (0.31").

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Average rainfall days in September
Florence, CO

Average rainfall days in September - Florence, CO
  • Average rainfall days in September: 10.1 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (2.7 days).

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Average snowfall in September
Florence, CO

Average snowfall in September - Florence, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Florence, CO

Average snowfall days in September - Florence, CO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Florence, CO
  • Average daylight in September: 12h and 2min

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 1min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 7h and 0min).

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Average sunshine days in September
Florence, CO

Average sunshine days in September - Florence, CO
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (24.7 days).
The month with the least sunshine days is July (4.7 days).

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Average UV index in September
Florence, CO

Average UV index in September - Florence, CO
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in September
Florence, CO

Average cloud cover in September - Florence, CO
  • Average cloud cover in September: 14

The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June, September, October and November (Cloud cover 14).

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Average visibility in September
Florence, CO

Average visibility in September - Florence, 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).

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Florence, Colorado, USA

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