August weather forecast and climate
Alton, FL

August, the last month of the summer, in Alton, is another tropical month, with average temperature ranging between min 74.8°F (23.8°C) and max 91.2°F (32.9°C).

Temperature

The warmest months are July and August, with an average high-temperature of 91.2°F (32.9°C).

Heat index

In August, the average heat index is estimated at a life-threatening hot 115.3°F (46.3°C). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

August, September and December, with an average relative humidity of 77%, are most humid months in Alton, Florida.

Rainfall

August is the month with the most rainfall in Alton. Rain falls for 25.5 days and accumulates 4.57" (116mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

The average length of the day in Alton is 13.2h.

Sunshine

In August, the average sunshine in Alton is 9.5h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Alton. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for the average person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the warmest month in Alton?

Warmest months are July and August, with an average high-temperature of 91.2°F (32.9°C).

What is the temperature in August in Alton?

In Alton, in August, the average high-temperature is 91.2°F (32.9°C), and the average low-temperature is 74.8°F (23.8°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), that represents influence of the relative humidity to air temperaure, in August is appraised at 115.3°F (46.3°C).

What is the most humid month in Alton?

August, September and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in August in Alton?

In August, the average relative humidity is 77%.

How much does it rain in Alton in August?

In Alton, in August, during 25.5 rainfall days, 4.57" (116mm) of precipitation is typically accumulated.

What is the rainiest month in Alton?

The month with the most rainfall is August when the rain falls for 25.5 days and typically aggregates up to 4.57" (116mm) of precipitation.

When it does not snow in Alton?

January, March through December are months without snowfall in Alton.

How many hours of daylight does Alton have in August?

In August, the average length of the day in Alton is 13.2h.

How long on average sun shines in August in Alton?

In Alton, Florida, the average sunshine in August is 9.5h.

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

Months with the highest UV index in Alton, Florida, are May through August, with an average maximum UV index of 7.

What is the UV index reading in August in Alton?

In Alton, the average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in August - Alton, FL
  • Average high temperature in August: 91.2°F

The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.2°F).

  • Average low temperature in August: 74.8°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure in August - Alton, FL
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is January (30.15").
Months with the lowest atmospheric pressure are June, August and September (29.98").

Average wind speed in August - Alton, FL
  • Average wind speed in August: 4.8mph

The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in August - Alton, FL
  • Average humidity in August: 77%

Months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is May (70%).

Average rainfall in August - Alton, FL
  • Average rainfall in August: 4.57"

The wettest month (with the highest rainfall) is August (4.57").
The driest month (with the least rainfall) is November (1.14").

Average rainfall days in August - Alton, FL
  • Average rainfall days in August: 25.5 days

The month with the highest number of rainy days is August (25.5 days).
The month with the least rainy days is November (7.2 days).

Average snowfall days in August - Alton, FL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in August / Average sunshine in August - Alton, FL
  • Average daylight in August: 13.2h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in August: 9.5h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.8h).

Average sunshine days in August - Alton, FL
  • Average sunshine days in August: 4.3 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (4.3 days).

Average UV index in August - Alton, FL
  • Average UV index in August: 7

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

Average cloud cover in August - Alton, FL
  • Average cloud cover in August: 33

The month with the most cloud cover is December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in August - Alton, FL
  • Average visibility in August: 6mi

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