April weather forecast and climate
Casselberry, FL

April, the same as March, is a moderately hot spring month in Casselberry, Florida, with average temperature ranging between min 63.9°F (17.7°C) and max 82°F (27.8°C).

Temperature

In April, the average high-temperature marginally rises, from a moderately hot 76.1°F (24.5°C) in March, to a still warm 82°F (27.8°C). The average low-temperature, in Casselberry, Florida, is 63.9°F (17.7°C).

Heat index

In April, the average heat index is appraised at a hot 86.9°F (30.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. 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', 'felt air temperature', 'feels like', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, 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.

Humidity

In April, the average relative humidity in Casselberry, Florida, is 72%.

Rainfall

In April, the rain falls for 12.4 days. Throughout April, 1.38" (35mm) of precipitation is accumulated. In Casselberry, during the entire year, the rain falls for 172.9 days and collects up to 22.76" (578mm) of precipitation.

Daylight

The average length of the day in April is 12.9h.

Sunshine

In April, the average sunshine in Casselberry is 9.4h.

UV index

In April, the average daily maximum UV index in Casselberry is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 in April interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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 temperature in April in Casselberry?

In April, in Casselberry, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 63.9°F (17.7°C). In April, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines air temperature and relative humidity, is calculated to 86.9°F (30.5°C).

What is the average humidity in April in Casselberry?

The average relative humidity in April in Casselberry, Florida, is 72%.

How many days does it rain in April in Casselberry?

In April, in Casselberry, Florida, the rain falls for 12.4 days. Throughout April, 1.38" (35mm) of precipitation is accumulated.

What is the average length of the day in April in Casselberry?

In April, the average length of the day in Casselberry, Florida, is 12.9h.

How long on average sun shines in April in Casselberry?

In April, the average sunshine is 9.4h.

How high is the UV index in April in Casselberry?

In April, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in April - Casselberry, FL
  • Average high temperature in April: 82°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (68.2°F).

  • Average low temperature in April: 63.9°F

The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (51.1°F).

Average pressure in April - Casselberry, FL
  • Average pressure in April: 30.03"

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 April - Casselberry, FL
  • Average wind speed in April: 6.5mph

The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in April - Casselberry, FL
  • Average humidity in April: 72%

The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is March (70%).

Average rainfall in April - Casselberry, FL
  • Average rainfall in April: 1.38"

The wettest month (with the highest rainfall) is August (3.82").
The driest months (with the least rainfall) are January and March (0.79").

Average rainfall days in April - Casselberry, FL
  • Average rainfall days in April: 12.4 days

The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is January (8.9 days).

Average daylight in April / Average sunshine in April - Casselberry, FL
  • Average daylight in April: 12.9h

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 April: 9.4h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 6.1h).

Average sunshine days in April - Casselberry, FL
  • Average sunshine days in April: 14.3 days

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (4.6 days).

Average UV index in April - Casselberry, FL
  • Average UV index in April: 6

Months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

Average cloud cover in April - Casselberry, FL
  • Average cloud cover in April: 30

The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).

Average visibility in April - Casselberry, FL
  • Average visibility in April: 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).