September weather forecast
Alma, CO

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The beauty of the Bristlecone Pines up the hill looking over to Alma and Fairplay, Colorado
The beauty of the Bristlecone Pines up the hill looking over to Alma and Fairplay, Colorado

Weather in September

September, the first month of the autumn in Alma, is also a moderate month, with an average temperature ranging between min 34.3°F (1.3°C) and max 58.8°F (14.9°C).

Temperature

September brings a slight decrease in the average high-temperature, shifting from a refreshing 64.4°F (18°C) in August to a mild 58.8°F (14.9°C). Despite the significant gap from daytime peaks, Alma experiences an average low-temperature of 34.3°F (1.3°C) in September.

Humidity

The average relative humidity in September is 59%.

Rainfall

In Alma, in September, it is raining for 12.9 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 113.5 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Snowfall

January through December are months with snowfall in Alma. In Alma, Colorado, in September, snow falls for 5 days, with typically accumulated 1.57" (40mm) of snow. Throughout the year, in Alma, there are 139 snowfall days, and 101.69" (2583mm) of snow is accumulated.

Daylight

In Alma, 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, in Alma, sunrise is at 7:00 am and sunset at 6:47 pm MDT.

Sunshine

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

UV index

The average daily maximum UV index in September in Alma, Colorado, is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 3 during September translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

What is the temperature in September in Alma?

Alma in September has an average high-temperature of 58.8°F (14.9°C) and an average low-temperature of 34.3°F (1.3°C).

What is the average humidity in September in Alma?

In Alma, Colorado, the average relative humidity in September is 59%.

How much does it rain in Alma in September?

In Alma, Colorado, in September, during 12.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

How much does it snow in Alma in September?

In Alma, Colorado, in September, during 5 snowfall days, 1.57" (40mm) of snow is typically accumulated.

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

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

When is the sunrise / sunset in September in Alma?

On the first day of September in Alma, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:47 pm MDT.

How many hours of sunshine does Alma have in September?

The average sunshine duration in September is 10.9h.

What is the UV index intensity in September in Alma?

In Alma, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Alma, CO

Average temperature in September - Alma, CO
  • Average high temperature in September: 58.8°F

The warmest month (with the highest average high temperature) is July (66.2°F).
The month with the lowest average high temperature is December (22.5°F).

  • Average low temperature in September: 34.3°F

The month with the highest average low temperature is July (40.5°F).
The coldest month (with the lowest average low temperature) is January (1.4°F).

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Average pressure in September
Alma, CO

Average pressure in September - Alma, CO
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).

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Average wind speed in September
Alma, CO

Average wind speed in September - Alma, CO
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in September
Alma, CO

Average humidity in September - Alma, CO
  • Average humidity in September: 59%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (52%).

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Average rainfall in September
Alma, CO

Average rainfall in September - Alma, CO
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is November (1.06").

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Average rainfall days in September
Alma, CO

Average rainfall days in September - Alma, CO
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (23.1 days).
The month with the least rainy days is November (2.8 days).

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Average snowfall in September
Alma, CO

Average snowfall in September - Alma, CO
  • Average snowfall in September: 1.57"

The month with the highest snowfall is May (16.26").
The month with the least snowfall is July (0.16").

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Average snowfall days in September
Alma, CO

Average snowfall days in September - Alma, CO
  • Average snowfall days in September: 5 days

The month with the highest number of snowfall days is April (18.8 days).
The month with the least snowfall days is July (0.5 days).

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

Average daylight in September / Average sunshine in September - Alma, 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 30min).

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

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Average sunshine days in September
Alma, CO

Average sunshine days in September - Alma, CO
  • Average sunshine days in September: 11.6 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (4.8 days).

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Average UV index in September
Alma, CO

Average UV index in September - Alma, 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 February (UV index 1).

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Average cloud cover in September
Alma, CO

Average cloud cover in September - Alma, CO
  • Average cloud cover in September: 19

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 17).

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Average visibility in September
Alma, CO

Average visibility in September - Alma, CO
  • Average visibility in September: 6mi

The months with the highest visibility are May, 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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Alma, Colorado, USA

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