August weather forecast
Fountain Hills, AZ

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Weather in August

August in Fountain Hills brings a subtle wind-down from the high-summer conditions of July. The semblance of a warm and arid climate persistently prevails, though sunlight hours shorten slightly. Humidity remains relatively high compared to preceding months, going hand in hand with a sustaining rainfall frequency. Despite this, sunshine does not cease, decorating the city for a substantial portion of the day. August heat shares similarity to July, pivoting between the high 80.4°F (26.9°C) and the slightly cooler peak of 98.2°F (36.8°C).

Temperature

In the transition from July to August, Fountain Hills reports an average high-temperature of a still sweltering 98.2°F (36.8°C), indicating a close resemblance to the prior month. Fountain Hills usually reports an average low-temperature of 80.4°F (26.9°C) during the month of August.

Humidity

The average relative humidity in August in Fountain Hills is 33%.

Rainfall

In Fountain Hills, during August, the rain falls for 10.8 days and regularly aggregates up to 1.3" (33mm) of precipitation. Throughout the year, in Fountain Hills, there are 67.9 rainfall days, and 10" (254mm) of precipitation is accumulated.

Daylight

In Fountain Hills, Arizona, the average length of the day in August is 13h and 22min.
On the first day of the month, sunrise is at 5:39 am and sunset at 7:26 pm. On the last day of August, sunrise is at 6:00 am and sunset at 6:53 pm MST.

Sunshine

In Fountain Hills, the average sunshine in August is 12.1h.

UV index

June through August, with an average maximum UV index of 8, are months with the highest UV index. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 8 during August morphs into the following directions:
Remember to safeguard yourself. Rapid damage can occur to skin and eyes without protection. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

How hot does it get in Fountain Hills in August?

The high-temperature, in August, in Fountain Hills, is 98.2°F (36.8°C), while the low-temperature averages to 80.4°F (26.9°C).

What is the average humidity in August in Fountain Hills?

The average relative humidity in August in Fountain Hills is 33%.

How many days does it rain in August in Fountain Hills?

In August, in Fountain Hills, Arizona, the rain falls for 10.8 days. Throughout August, 1.3" (33mm) of precipitation is accumulated.

How many hours of daylight does Fountain Hills have in August?

In Fountain Hills, the average day length in August is 13h and 22min.

When are sunrise and sunset in August in Fountain Hills?

On the first day of August in Fountain Hills, Arizona, sunrise is at 5:39 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 6:53 pm MST.

How many hours of sunshine does Fountain Hills have in August?

In August, the average sunshine duration in Fountain Hills, Arizona, is 12.1h.

What are the months with the highest UV index in Fountain Hills?

The months with the highest UV index in Fountain Hills are June through August, with an average maximum UV index of 8.

What is the UV index intensity in August in Fountain Hills?

In August, the average daily maximum UV index in Fountain Hills, Arizona, is 8. A UV Index estimate of 8 to 10 represents a very high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Fountain Hills, AZ

Average temperature in August - Fountain Hills, AZ
  • Average high temperature in August: 98.2°F

The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (60.3°F).

  • Average low temperature in August: 80.4°F

The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is December (44.2°F).

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Average pressure in August
Fountain Hills, AZ

Average pressure in August - Fountain Hills, AZ
  • Average pressure in August: 29.89"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in August
Fountain Hills, AZ

Average wind speed in August - Fountain Hills, AZ
  • Average wind speed in August: 5.2mph

The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest month (with the lowest average wind speed) is December (4.8mph).

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Average humidity in August
Fountain Hills, AZ

Average humidity in August - Fountain Hills, AZ
  • Average humidity in August: 33%

The month with the highest relative humidity is December (46%).
The month with the lowest relative humidity is June (17%).

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Average rainfall in August
Fountain Hills, AZ

Average rainfall in August - Fountain Hills, AZ
  • Average rainfall in August: 1.3"

The wettest month (with the highest rainfall) is July (1.54").
The driest months (with the least rainfall) are May and June (0.12").

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Average rainfall days in August
Fountain Hills, AZ

Average rainfall days in August - Fountain Hills, AZ
  • Average rainfall days in August: 10.8 days

The month with the highest number of rainy days is July (12.2 days).
The month with the least rainy days is June (1.6 days).

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Average daylight in August /
Average sunshine in August
Fountain Hills, AZ

Average daylight in August / Average sunshine in August - Fountain Hills, AZ
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in August: 12h and 1min

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

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Average sunshine days in August
Fountain Hills, AZ

Average sunshine days in August - Fountain Hills, AZ
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is May (28 days).
The month with the least sunshine days is July (14 days).

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Average UV index in August
Fountain Hills, AZ

Average UV index in August - Fountain Hills, AZ
  • Average UV index in August: 8

The 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 August
Fountain Hills, AZ

Average cloud cover in August - Fountain Hills, AZ
  • Average cloud cover in August: 12

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 6).

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Average visibility in August
Fountain Hills, AZ

Average visibility in August - Fountain Hills, AZ
  • Average visibility in August: 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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Fountain Hills, Arizona, USA

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