August weather forecast
Surprise, AZ

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Weather in August

August sustains July's temperatures, barely providing any respite from the summer heat. High temperatures continue through the month, reaching an average high of 100.9°F (38.3°C). Sunshine is still plentiful, and rainfall remains scarce, as Surprise endures the peak of summer. Despite the high temperatures, residents adapt to the scorching weather promising the advent of cooler days.

Temperature

August in Surprise brings an average high-temperature of a still torrid 100.9°F (38.3°C), nearly identical to the preceding month. During the month of August, Surprise anticipates a mean low-temperature of 83.1°F (28.4°C).

Humidity

The average relative humidity in August is 31%.

Rainfall

In August, in Surprise, the rain falls for 10.3 days. Throughout August, 1.26" (32mm) of precipitation is accumulated. Throughout the year, in Surprise, there are 60.7 rainfall days, and 8.62" (219mm) of precipitation is accumulated.

Daylight

In Surprise, the average length of the day in August is 13h and 22min.
On the first day of the month, sunrise is at 5:42 am and sunset at 7:29 pm. On the last day of August, in Surprise, sunrise is at 6:03 am and sunset at 6:55 pm MST.

Sunshine

The average sunshine in August is 11.8h.

UV index

The months with the highest UV index in Surprise are June through August, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 8 in August suggests the following recommendations:
Ensure you're always protected. Unprotected skin can get damaged in moments. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

How hot does it get in Surprise in August?

An average high-temperature, in August, in Surprise, is 100.9°F (38.3°C) and the average low-temperature is 83.1°F (28.4°C).

What is the average humidity in August in Surprise?

The average relative humidity in August is 31%.

How much does it rain in Surprise in August?

In Surprise, during August, the rain falls for 10.3 days and regularly aggregates up to 1.26" (32mm) of precipitation.

How many hours of daylight does Surprise have in August?

The average day length in August is 13h and 22min.

When is the sunrise / sunset in August in Surprise?

In August, on the first day of the month, sunrise is at 5:42 am and sunset at 7:29 pm. On the last day of the month, in Surprise, sunrise is at 6:03 am and sunset at 6:55 pm MST.

How many hours of sunshine does Surprise have in August?

In Surprise, the average sunshine duration in August is 11.8h.

What are the months with the highest UV index in Surprise?

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

What is the UV index reading in August in Surprise?

In Surprise, Arizona, the average daily maximum UV index in August is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Surprise, AZ

Average temperature in August - Surprise, AZ
  • Average high temperature in August: 100.9°F

The warmest month (with the highest average high temperature) is July (101.7°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in August: 83.1°F

The month with the highest average low temperature is August (83.1°F).
The coldest months (with the lowest average low temperature) are January and December (46°F).

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Average pressure in August
Surprise, AZ

Average pressure in August - Surprise, AZ
  • Average pressure in August: 29.86"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).

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Average wind speed in August
Surprise, AZ

Average wind speed in August - Surprise, AZ
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).

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Average humidity in August
Surprise, AZ

Average humidity in August - Surprise, AZ
  • Average humidity in August: 31%

The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).

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Average rainfall in August
Surprise, AZ

Average rainfall in August - Surprise, AZ
  • Average rainfall in August: 1.26"

The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in August
Surprise, AZ

Average rainfall days in August - Surprise, AZ
  • Average rainfall days in August: 10.3 days

The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is June (1.2 days).

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Average daylight in August /
Average sunshine in August
Surprise, AZ

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in August: 11h and 5min

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
Surprise, AZ

Average sunshine days in August - Surprise, AZ
  • Average sunshine days in August: 15.7 days

The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (15.2 days).

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Average UV index in August
Surprise, AZ

Average UV index in August - Surprise, 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
Surprise, AZ

Average cloud cover in August - Surprise, AZ
  • Average cloud cover in August: 12

The month with the most cloud cover is December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in August
Surprise, AZ

Average visibility in August - Surprise, 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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Surprise, Arizona, USA

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