August weather forecast
Naples, IL

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Weather in August

The last month of the summer, August, is another warm month in Naples, Illinois, with an average temperature fluctuating between 64.9°F (18.3°C) and 83.5°F (28.6°C).

Temperature

In August, Naples notes an average high-temperature of a still moderately hot 83.5°F (28.6°C), hardly different from the preceding month. August nights in Naples experience a consistent temperature drop to an enjoyable 64.9°F (18.3°C).

Heat index

The average heat index in August is appraised at a hot 91.4°F (33°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

In August, the average relative humidity in Naples is 79%.

Rainfall

In Naples, in August, during 14.9 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, there are 155.4 rainfall days, and 31.69" (805mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 41min.
On the first day of August, sunrise is at 6:02 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:34 pm CDT.

Sunshine

In Naples, Illinois, the average sunshine in August is 9.9h.

UV index

The months with the highest UV index in Naples are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 6 during August translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot in Naples during August?

The average high-temperature, in August, in Naples, is 83.5°F (28.6°C), while the average low-temperature is 64.9°F (18.3°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in August is appraised at 91.4°F (33°C).

What is the average humidity in August in Naples?

The average relative humidity in August in Naples, Illinois, is 79%.

How much does it rain in Naples in August?

In Naples, in August, it is raining for 14.9 days, with typically 2.72" (69mm) of accumulated precipitation.

When it does not snow in Naples?

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

What is the average length of the day in August in Naples?

The average day length in August in Naples, Illinois, is 13h and 41min.

When are sunrise and sunset in August in Naples?

In August, on the first day of the month, sunrise is at 6:02 am and sunset at 8:15 pm. On the last day of the month, in Naples, sunrise is at 6:30 am and sunset at 7:34 pm CDT.

How many hours of sunshine does Naples have in August?

In August, the average sunshine duration is 9.9h.

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

June through August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in August in Naples?

In August, the average daily maximum UV index in Naples is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe 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
Naples, IL

Average temperature in August - Naples, IL
  • Average high temperature in August: 83.5°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in August
Naples, IL

Average pressure in August - Naples, IL
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Naples, IL

Average wind speed in August - Naples, IL
  • Average wind speed in August: 6.1mph

The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity in August
Naples, IL

Average humidity in August - Naples, IL
  • Average humidity in August: 79%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Naples, IL

Average rainfall in August - Naples, IL
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is May (4.02").
The driest months (with the least rainfall) are January, February and December (1.73").

Average rainfall days in August
Naples, IL

Average rainfall days in August - Naples, IL
  • Average rainfall days in August: 14.9 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.2 days).

Average snowfall in August
Naples, IL

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

The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Naples, IL

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

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Naples, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in August
Naples, IL

Average sunshine days in August - Naples, IL
  • Average sunshine days in August: 12.8 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (8.6 days).

Average UV index in August
Naples, IL

Average UV index in August - Naples, IL
  • Average UV index in August: 6

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).

Average cloud cover in August
Naples, IL

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

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).

Average visibility in August
Naples, IL

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

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

Naples, Illinois, USA

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