September weather forecast and climate
American Fork, UT

Weather in September

September, the first month of the autumn, in American Fork, is still a warm month, with average temperature ranging between min 48.9°F (9.4°C) and max 74.1°F (23.4°C).

Temperature

In American Fork, Utah, the average high-temperature slightly decreases, from 82.9°F (28.3°C) in August, to a still moderately hot 74.1°F (23.4°C). In American Fork, Utah, in September, the average low-temperature is 48.9°F (9.4°C).

Humidity

In American Fork, the average relative humidity is 43%.

Rainfall

In September, the rain falls for 9.7 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in American Fork, there are 123.2 rainfall days, and 16.73" (425mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in American Fork.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In American Fork, the average sunshine in September is 10h.

UV index

In September, the average daily maximum UV index in American Fork is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in American Fork?

The average high-temperature, in September, in American Fork, is 74.1°F (23.4°C), while the average low-temperature is 48.9°F (9.4°C).

What is the average humidity in September in American Fork?

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

How many days does it rain in September in American Fork?

In American Fork, Utah, in September, during 9.7 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

Does it snow in American Fork in September?

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

When it does not snow in American Fork?

In American Fork snow does not fall in June through September.

How many hours of daylight does American Fork have in September?

In September, the average length of the day in American Fork, Utah, is 12.4h.

How long on average sun shines in September in American Fork?

The average sunshine in September in American Fork, Utah, is 10h.

How high is the UV index in September in American Fork?

In American Fork, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
American Fork, UT

Average temperature in September - American Fork, UT
  • Average high temperature in September: 74.1°F

The warmest month (with the highest average high temperature) is July (85.3°F).
Months with the lowest average high temperature are January and December (32.4°F).

  • Average low temperature in September: 48.9°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

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Average pressure in September
American Fork, UT

Average pressure in September - American Fork, UT
  • Average pressure in September: 29.95"

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

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Average wind speed in September
American Fork, UT

Average wind speed in September - American Fork, UT
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).

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Average humidity in September
American Fork, UT

Average humidity in September - American Fork, UT
  • Average humidity in September: 43%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is July (38%).

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Average rainfall in September
American Fork, UT

Average rainfall in September - American Fork, UT
  • Average rainfall in September: 0.98"

The wettest months (with the highest rainfall) are April and December (1.93").
The driest month (with the least rainfall) is June (0.75").

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Average rainfall days in September
American Fork, UT

Average rainfall days in September - American Fork, UT
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is May (14.3 days).
Months with the least rainy days are June and November (7.3 days).

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Average snowfall in September
American Fork, UT

Average snowfall in September - American Fork, UT
  • Average snowfall in September: 0"

The month with the highest snowfall is January (11.06").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
American Fork, UT

Average snowfall days in September - American Fork, UT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (13 days).
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
American Fork, UT

Average daylight in September / Average sunshine in September - American Fork, UT
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 10h

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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Average sunshine days in September
American Fork, UT

Average sunshine days in September - American Fork, UT
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is February (11.4 days).

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Average UV index in September
American Fork, UT

Average UV index in September - American Fork, UT
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
American Fork, UT

Average cloud cover in September - American Fork, UT
  • Average cloud cover in September: 12

The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in September
American Fork, UT

Average visibility in September - American Fork, UT
  • Average visibility in September: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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