September weather forecast
Valle, AZ

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Weather in September

The first month of the autumn, September, is still a warm month in Valle, Arizona, with an average temperature varying between 57°F (13.9°C) and 77.9°F (25.5°C).

Temperature

The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 84.2°F (29°C) in August to a still moderately hot 77.9°F (25.5°C). September is noted for a mean low-temperature of 57°F (13.9°C).

Humidity

The average relative humidity in September in Valle is 37%.

Rainfall

In September, the rain falls for 3.4 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Valle, during the entire year, the rain falls for 46.8 days and collects up to 4.29" (109mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of the month, sunrise is at 6:01 am and sunset at 6:55 pm. On the last day of September, in Valle, sunrise is at 6:23 am and sunset at 6:13 pm MST.

Sunshine

In September, the average sunshine is 9.8h.

UV index

In Valle, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 5 during September translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

What are the temperatures in Valle in September?

The high-temperature, in September, in Valle, records 77.9°F (25.5°C), while the low-temperature is 57°F (13.9°C).

What is the average humidity in September in Valle?

In September, the average relative humidity is 37%.

How many days does it rain in September in Valle?

In September, in Valle, Arizona, the rain falls for 3.4 days. Throughout September, 0.2" (5mm) of precipitation is accumulated.

When it does not snow in Valle?

In Valle, snow does not fall in June through September.

Does it snow in Valle in September?

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

How many hours of daylight does Valle have in September?

In Valle, Arizona, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September in Valle?

In September, on the first day of the month, sunrise is at 6:01 am and sunset at 6:55 pm. On the last day of the month, in Valle, sunrise is at 6:23 am and sunset at 6:13 pm MST.

How long on average sun shines in September in Valle?

The average sunshine duration in September in Valle, Arizona, is 9.8h.

How high is the UV index in September in Valle?

The average daily maximum UV index in September in Valle is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health 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
Valle, AZ

Average temperature in September - Valle, AZ
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in September: 57°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).

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Average pressure in September
Valle, AZ

Average pressure in September - Valle, AZ
  • Average pressure in September: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Valle, AZ

Average wind speed in September - Valle, AZ
  • Average wind speed in September: 6.9mph

The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is January (6.6mph).

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Average humidity in September
Valle, AZ

Average humidity in September - Valle, AZ
  • Average humidity in September: 37%

The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is June (21%).

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Average rainfall in September
Valle, AZ

Average rainfall in September - Valle, AZ
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is March (0.51").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Valle, AZ

Average rainfall days in September - Valle, AZ
  • Average rainfall days in September: 3.4 days

The month with the highest number of rainy days is July (6 days).
The month with the least rainy days is June (1.9 days).

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Average snowfall in September
Valle, AZ

Average snowfall in September - Valle, AZ
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Valle, AZ

Average snowfall days in September - Valle, AZ
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are February and December (5.3 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
Valle, AZ

Average daylight in September / Average sunshine in September - Valle, AZ
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 48min).

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Average sunshine days in September
Valle, AZ

Average sunshine days in September - Valle, AZ
  • Average sunshine days in September: 25.1 days

The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is February (21.4 days).

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Average UV index in September
Valle, AZ

Average UV index in September - Valle, AZ
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Valle, AZ

Average cloud cover in September - Valle, AZ
  • Average cloud cover in September: 9

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 7).

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Average visibility in September
Valle, AZ

Average visibility in September - Valle, AZ
  • 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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Valle, Arizona, USA

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