August weather forecast
Phoenix, IL

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Weather in August

The last month of the summer, August, is another warm month in Phoenix, Illinois, with an average temperature fluctuating between 64.6°F (18.1°C) and 80.1°F (26.7°C).

Temperature

August's advent denotes a minor fluctuation in the average high-temperature to a still moderately hot 80.1°F (26.7°C) from July's 81.3°F (27.4°C). Phoenix observes an average low-temperature of 64.6°F (18.1°C) during August nights.

Humidity

In Phoenix, the average relative humidity in August is 78%.

Rainfall

In Phoenix, in August, during 14.8 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Phoenix, Illinois, during the entire year, the rain falls for 155.6 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

In Phoenix, snow does not fall in May through September.

Daylight

In Phoenix, the average length of the day in August is 13h and 48min.
On the first day of August, sunrise is at 5:45 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:24 pm CDT.

Sunshine

The month with the most sunshine is August, with an average of 10.1h of sunshine.

UV index

In Phoenix, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the maximum UV index of 5 suggests these recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in August?

In Phoenix, 80.1°F (26.7°C) is the average high-temperature and 64.6°F (18.1°C) is the average low-temperature during August. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in July is calculated to be 87.8°F (31°C).

What is the average humidity in August?

In Phoenix, the average relative humidity in August is 78%.

How much does it rain in August?

In Phoenix, in August, it is raining for 14.8 days, with typically 2.56" (65mm) of accumulated precipitation.

When it does not snow?

May through September are months without snowfall.

What is the average length of the day in August?

In Phoenix, the average day length in August is 13h and 48min.

What time are sunrise and sunset in August in Phoenix?

In August, on the first day of the month, sunrise is at 5:45 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:24 pm CDT.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.1h of sunshine.

How long on average sun shines in August?

The average sunshine duration in August is 10.1h.

What is the UV index reading in August?

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
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 August
Phoenix, IL

Average temperature in August - Phoenix, IL
  • Average high temperature in August: 80.1°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in August: 64.6°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in August
Phoenix, IL

Average pressure in August - Phoenix, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Phoenix, IL

Average wind speed in August - Phoenix, IL
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in August
Phoenix, IL

Average humidity in August - Phoenix, IL
  • Average humidity in August: 78%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).

Average rainfall in August
Phoenix, IL

Average rainfall in August - Phoenix, IL
  • Average rainfall in August: 2.56"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").

Average rainfall days in August
Phoenix, IL

Average rainfall days in August - Phoenix, IL
  • Average rainfall days in August: 14.8 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).

Average snowfall in August
Phoenix, IL

Average snowfall in August - Phoenix, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Phoenix, IL

Average snowfall days in August - Phoenix, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Phoenix, IL

Average daylight in August / Average sunshine in August - Phoenix, IL
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in August
Phoenix, IL

Average sunshine days in August - Phoenix, IL
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).

Average UV index in August
Phoenix, IL

Average UV index in August - Phoenix, IL
  • Average UV index in August: 5

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

Average cloud cover in August
Phoenix, IL

Average cloud cover in August - Phoenix, IL
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in August
Phoenix, IL

Average visibility in August - Phoenix, IL
  • Average visibility in August: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Phoenix, Illinois, USA

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