September weather forecast
Altamont, UT

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Weather in September

September, the first month of the autumn in Altamont, is also an agreeable month, with an average temperature fluctuating between 46.6°F (8.1°C) and 68.9°F (20.5°C).

Temperature

Transition into September subtly marks a drop in the average high-temperature, moderately moving from a warm 76.6°F (24.8°C) in August to a pleasant 68.9°F (20.5°C). The temperature in Altamont notes a substantial fall from the daily peak to an average of 46.6°F (8.1°C) during September nights.

Humidity

In Altamont, Utah, the average relative humidity in September is 43%.

Rainfall

In Altamont, in September, during 10.3 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Altamont, during the entire year, the rain falls for 124.1 days and collects up to 12.87" (327mm) of precipitation.

Snowfall

In Altamont, Utah, snow does not fall in June through September.

Daylight

The average length of the day in September in Altamont is 12h and 26min.
On the first day of the month, sunrise is at 6:49 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:04 pm MDT.

Sunshine

In Altamont, the average sunshine in September is 10.5h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 4 transforms into the following advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
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Frequently asked questions

What is the temperature in September in Altamont?

The high-temperature in Altamont, Utah, during September is 68.9°F (20.5°C) and the low-temperature is 46.6°F (8.1°C).

What is the average humidity in September in Altamont?

The average relative humidity in September in Altamont, Utah, is 43%.

How many days does it rain in September in Altamont?

In Altamont, Utah, during September, the rain falls for 10.3 days and regularly aggregates up to 0.94" (24mm) of precipitation.

When it does not snow in Altamont?

June through September are months without snowfall in Altamont, Utah.

Does it snow in Altamont in September?

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

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

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

When is the sunrise / sunset in September in Altamont?

In September, on the first day of the month, sunrise is at 6:49 am and sunset at 7:52 pm. On the last day of the month, in Altamont, sunrise is at 7:17 am and sunset at 7:04 pm MDT.

How long on average sun shines in September in Altamont?

The average sunshine duration in September in Altamont is 10.5h.

What is the UV index intensity in September in Altamont?

In September, the average daily maximum UV index in Altamont is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
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
Altamont, UT

Average temperature in September - Altamont, UT
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The months with the lowest average high temperature are January and December (28.9°F).

  • Average low temperature in September: 46.6°F

The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

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Average pressure in September
Altamont, UT

Average pressure in September - Altamont, UT
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in September
Altamont, UT

Average wind speed in September - Altamont, UT
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in September
Altamont, UT

Average humidity in September - Altamont, UT
  • Average humidity in September: 43%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (36%).

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Average rainfall in September
Altamont, UT

Average rainfall in September - Altamont, UT
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is May (1.65").
The driest month (with the least rainfall) is November (0.71").

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Average rainfall days in September
Altamont, UT

Average rainfall days in September - Altamont, UT
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is November (6.2 days).

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Average snowfall in September
Altamont, UT

Average snowfall in September - Altamont, UT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (7.24").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Altamont, UT

Average snowfall days in September - Altamont, UT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (11.8 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
Altamont, UT

Average daylight in September / Average sunshine in September - Altamont, UT
  • Average daylight in September: 12h and 2min

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

  • Average sunshine in September: 10h and 3min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).

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Average sunshine days in September
Altamont, UT

Average sunshine days in September - Altamont, UT
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is April (12.4 days).

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Average UV index in September
Altamont, UT

Average UV index in September - Altamont, UT
  • 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, March, October, November and December (UV index 2).

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Average cloud cover in September
Altamont, UT

Average cloud cover in September - Altamont, UT
  • Average cloud cover in September: 13

The month with the most cloud cover is February (Cloud cover 33).
The months with the least cloud cover are June and September (Cloud cover 13).

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Average visibility in September
Altamont, UT

Average visibility in September - Altamont, UT
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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Altamont, Utah, USA

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