September weather forecast and climate
Riviera, AZ

Weather in September

The first month of the autumn, September, is still a hot month in Riviera, Arizona, with average temperature fluctuating between 75°F (23.9°C) and 92.8°F (33.8°C).

Temperature

In Riviera, the average high-temperature slightly decreases, from a torrid 100°F (37.8°C) in August, to a hot 92.8°F (33.8°C). In September, in Riviera, the average low-temperature is 75°F (23.9°C).

Humidity

In Riviera, the average relative humidity is 24%.

Rainfall

In Riviera, Arizona, in September, it is raining for 3.5 days, with typically 0.28" (7mm) of accumulated precipitation. In Riviera, during the entire year, the rain falls for 44 days and collects up to 4.21" (107mm) of precipitation.

Snowfall

In Riviera snow does not fall in January through November.

Daylight

In September, the average length of the day in Riviera, Arizona, is 12.4h.

Sunshine

In Riviera, the average sunshine in September is 9.9h.

UV index

In Riviera, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Riviera?

In Riviera, Arizona, in September, the average high-temperature is 92.8°F (33.8°C), and the average low-temperature is 75°F (23.9°C).

What is the average humidity in September in Riviera?

In September, the average relative humidity in Riviera, Arizona, is 24%.

How much does it rain in Riviera in September?

In Riviera, Arizona, during September, the rain falls for 3.5 days and regularly aggregates up to 0.28" (7mm) of precipitation.

When it does not snow in Riviera?

January through November are months without snowfall in Riviera.

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

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

How long on average sun shines in September in Riviera?

In Riviera, Arizona, the average sunshine in September is 9.9h.

What is the UV index intensity in September in Riviera?

The average daily maximum UV index in September in Riviera, Arizona, is 7. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Riviera, AZ

Average temperature in September - Riviera, AZ
  • Average high temperature in September: 92.8°F

The warmest month (with the highest average high temperature) is July (100.8°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in September: 75°F

The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is December (43.5°F).

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Average pressure in September
Riviera, AZ

Average pressure in September - Riviera, AZ
  • Average pressure in September: 29.83"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.76").

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Average wind speed in September
Riviera, AZ

Average wind speed in September - Riviera, AZ
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is September (7.6mph).

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Average humidity in September
Riviera, AZ

Average humidity in September - Riviera, AZ
  • Average humidity in September: 24%

The month with the highest relative humidity is January (42%).
The month with the lowest relative humidity is June (14%).

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Average rainfall in September
Riviera, AZ

Average rainfall in September - Riviera, AZ
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is December (0.67").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Riviera, AZ

Average rainfall days in September - Riviera, AZ
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is July (5.9 days).
The month with the least rainy days is June (1.1 days).

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Average snowfall days in September
Riviera, AZ

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

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Riviera, AZ

Average daylight in September / Average sunshine in September - Riviera, AZ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 9.9h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in September
Riviera, AZ

Average sunshine days in September - Riviera, AZ
  • Average sunshine days in September: 24.6 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is July (20.3 days).

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Average UV index in September
Riviera, AZ

Average UV index in September - Riviera, AZ
  • Average UV index in September: 7

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Riviera, AZ

Average cloud cover in September - Riviera, AZ
  • Average cloud cover in September: 6

The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in September
Riviera, AZ

Average visibility in September - Riviera, AZ
  • Average visibility in September: 6mi

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

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