August weather forecast
Key, AL

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Weather in August

August, the last month of the summer in Key, is another tropical month, with an average temperature fluctuating between 68°F (20°C) and 87.6°F (30.9°C).

Temperature

August reports an average high-temperature of a still tropical 87.6°F (30.9°C), slightly varied from July's 88.7°F (31.5°C). Key anticipates an average minimum temperature of 68°F (20°C) in the month of August.

Heat index

In August, the average heat index is estimated at a very hot 102.2°F (39°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In August, the average relative humidity is 75%.

Rainfall

In Key, during August, the rain falls for 19.7 days and regularly aggregates up to 3.86" (98mm) of precipitation. Throughout the year, in Key, there are 181.2 rainfall days, and 41.06" (1043mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In August, the average length of the day is 13h and 23min.
On the first day of the month, sunrise is at 5:53 am and sunset at 7:42 pm. On the last day of August, sunrise is at 6:15 am and sunset at 7:08 pm CDT.

Sunshine

The average sunshine in August is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 6 in August transforms into this advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

Key in August has an average high-temperature of 87.6°F (30.9°C) and an average low-temperature of 68°F (20°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 102.2°F (39°C).

What is the average humidity in August?

The average relative humidity in August is 75%.

How much does it rain in August?

In Key, in August, it is raining for 19.7 days, with typically 3.86" (98mm) of accumulated precipitation.

When it does not snow in Key?

In Key, snow does not fall in April through October.

What is the average length of the day in August?

In August, the average day length is 13h and 23min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:53 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:08 pm CDT.

How long on average sun shines in August?

In Key, the average sunshine duration in August is 10.2h.

What is the month with the highest UV index?

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

What is the UV index intensity in August?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
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
Key, AL

Average temperature in August - Key, AL
  • Average high temperature in August: 87.6°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (48.9°F).

  • Average low temperature in August: 68°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

Average pressure in August
Key, AL

Average pressure in August - Key, AL
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in August
Key, AL

Average wind speed in August - Key, AL
  • Average wind speed in August: 4.1mph

The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in August
Key, AL

Average humidity in August - Key, AL
  • Average humidity in August: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in August
Key, AL

Average rainfall in August - Key, AL
  • Average rainfall in August: 3.86"

The wettest months (with the highest rainfall) are February and December (4.06").
The driest month (with the least rainfall) is October (2.56").

Average rainfall days in August
Key, AL

Average rainfall days in August - Key, AL
  • Average rainfall days in August: 19.7 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (9.8 days).

Average snowfall in August
Key, AL

Average snowfall in August - Key, AL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Key, AL

Average snowfall days in August - Key, AL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Key, AL

Average daylight in August / Average sunshine in August - Key, AL
  • 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: 9h and 54min).

  • Average sunshine in August: 10h and 1min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in August
Key, AL

Average sunshine days in August - Key, AL
  • Average sunshine days in August: 8.6 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (8 days).

Average UV index in August
Key, AL

Average UV index in August - Key, AL
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in August
Key, AL

Average cloud cover in August - Key, AL
  • Average cloud cover in August: 32

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in August
Key, AL

Average visibility in August - Key, AL
  • Average visibility in August: 6mi

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

Key, Alabama, USA

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