September weather forecast
Teton, ID

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Weather in September

The first month of the autumn, September, is also an agreeable month in Teton, Idaho, with an average temperature ranging between min 47.1°F (8.4°C) and max 72.5°F (22.5°C).

Temperature

September's onset brings a reduction in the average high-temperature, from a warm 82.9°F (28.3°C) in August to a pleasant 72.5°F (22.5°C). Teton documents a substantial deviation from daytime highs with a consistent low-temperature of 47.1°F (8.4°C) during September nights.

Humidity

The average relative humidity in September in Teton, Idaho, is 44%.

Rainfall

In Teton, in September, during 7.1 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, in Teton, there are 97.5 rainfall days, and 11.85" (301mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Teton. September is the first month it typically snows in Teton. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 83.8 snowfall days, and 41.93" (1065mm) of snow is accumulated.

Daylight

In September, the average length of the day in Teton, Idaho, is 12h and 29min.
On the first day of September, sunrise is at 6:51 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:08 pm MDT.

Sunshine

The average sunshine in September is 10h.

UV index

The average daily maximum UV index in September is 4. A UV Index value 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 suggests this advice:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. When the Sun is at its strongest around midday, find shade and limit exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the usual temperature for Teton in September?

The high-temperature, in September, in Teton, records 72.5°F (22.5°C), while the low-temperature is 47.1°F (8.4°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is evaluated at 82.4°F (28°C).

What is the average humidity in September in Teton?

The average relative humidity in September is 44%.

How much does it rain in Teton in September?

In Teton, Idaho, in September, it is raining for 7.1 days, with typically 0.87" (22mm) of accumulated precipitation.

When does it start to snow in Teton?

September is the first month it typically snows in Teton, Idaho. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

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

In September, the average day length is 12h and 29min.

When are sunrise and sunset in September in Teton?

On the first day of September in Teton, sunrise is at 6:51 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:08 pm MDT.

How long on average sun shines in September in Teton?

The average sunshine duration in September is 10h.

What is the UV index reading in September in Teton?

In Teton, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Teton, ID

Average temperature in September - Teton, ID
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (26.2°F).

  • Average low temperature in September: 47.1°F

The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

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Average pressure in September
Teton, ID

Average pressure in September - Teton, ID
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Teton, ID

Average wind speed in September - Teton, ID
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is June (6.9mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).

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Average humidity in September
Teton, ID

Average humidity in September - Teton, ID
  • Average humidity in September: 44%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in September
Teton, ID

Average rainfall in September - Teton, ID
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is January (1.5").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in September
Teton, ID

Average rainfall days in September - Teton, ID
  • Average rainfall days in September: 7.1 days

The month with the highest number of rainy days is April (13 days).
The month with the least rainy days is July (5 days).

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Average snowfall in September
Teton, ID

Average snowfall in September - Teton, ID
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (11.97").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Teton, ID

Average snowfall days in September - Teton, ID
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is January (18.1 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Teton, ID

Average daylight in September / Average sunshine in September - Teton, ID
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 10h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in September
Teton, ID

Average sunshine days in September - Teton, ID
  • Average sunshine days in September: 20.7 days

The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is February (10.6 days).

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Average UV index in September
Teton, ID

Average UV index in September - Teton, ID
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in September
Teton, ID

Average cloud cover in September - Teton, ID
  • Average cloud cover in September: 16

The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in September
Teton, ID

Average visibility in September - Teton, ID
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (3mi).

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Teton, Idaho, USA

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