May weather forecast and climate
Altoona, FL

The last month of the spring, May, is a hot month in Altoona, Florida, with average temperature fluctuating between 86.2°F (30.1°C) and 68°F (20°C).

Temperature

In Altoona, the average high-temperature is relatively the same as in April - a tropical 86.2°F (30.1°C). The average low-temperature, in Altoona, is 68°F (20°C).

Heat index

The average heat index in May is calculated to a very hot 96.8°F (36°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy 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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Altoona, the average relative humidity is 73%.

Rainfall

In Altoona, during 16.7 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. Throughout the year, there are 193.1 rainfall days, and 35.71" (907mm) of precipitation is accumulated.

Daylight

The average length of the day in May is 13.6h.

Sunshine

May and July, with an average of 10.7h of sunshine, are months with the most sunshine in Altoona.

UV index

Months with the highest UV index in Altoona are May through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Altoona?

In Altoona, Florida, in May, the average high-temperature is 86.2°F (30.1°C), and the average low-temperature is 68°F (20°C). In May, the average heat index (a.k.a. 'real feel', 'feels like'), that calculates temperature value influenced by the moisture in the air, is estimated at 96.8°F (36°C).

What is the average humidity in May in Altoona?

The average relative humidity in May in Altoona is 73%.

How many days does it rain in May in Altoona?

In Altoona, Florida, in May, it is raining for 16.7 days, with typically 3.23" (82mm) of accumulated precipitation.

How many hours of daylight does Altoona have in May?

The average length of the day in May is 13.6h.

What is the month with the most sunshine in Altoona?

May and July, with an average of 10.7h of sunshine, are months with the most sunshine in Altoona.

How long on average sun shines in May in Altoona?

In Altoona, Florida, the average sunshine in May is 10.7h.

When is the highest UV index in Altoona?

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

What is the UV index reading in May in Altoona?

In May, the average daily maximum UV index in Altoona is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in May - Altoona, FL
  • Average high temperature in May: 86.2°F

The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is January (67.5°F).

  • Average low temperature in May: 68°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (49.5°F).

Average pressure in May - Altoona, FL
  • Average pressure in May: 30.02"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is September (29.97").

Average wind speed in May - Altoona, FL
  • Average wind speed in May: 5.8mph

The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

Average humidity in May - Altoona, FL
  • Average humidity in May: 73%

Months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).

Average rainfall in May - Altoona, FL
  • Average rainfall in May: 3.23"

The wettest month (with the highest rainfall) is July (5.91").
The driest months (with the least rainfall) are March and November (1.26").

Average rainfall days in May - Altoona, FL
  • Average rainfall days in May: 16.7 days

The month with the highest number of rainy days is July (26.9 days).
The month with the least rainy days is January (9.2 days).

Average daylight in May / Average sunshine in May - Altoona, FL
  • Average daylight in May: 13.6h

The month with the longest days is June (Average daylight: 14h).
The month with the shortest days is December (Average daylight: 10.3h).

  • Average sunshine in May: 10.7h

Months with the most sunshine are May and July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 6.1h).

Average sunshine days in May - Altoona, FL
  • Average sunshine days in May: 12.8 days

The month with the most sunshine days is January (19 days).
The month with the least sunshine days is August (2.1 days).

Average UV index in May - Altoona, FL
  • Average UV index in May: 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 4).

Average cloud cover in May - Altoona, FL
  • Average cloud cover in May: 29

Months with the most cloud cover are February and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 29).

Average visibility in May - Altoona, FL
  • Average visibility in May: 6mi

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