May weather forecast
Williston, FL

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Weather in May

The last month of the spring, May, is another warm month in Williston, Florida, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 67.3°F (19.6°C).

Temperature

With the advent of May, Williston experiences an average high-temperature of a still warm 85.8°F (29.9°C), mirroring a close resemblance to the previous month. Williston records an average low-temperature of 67.3°F (19.6°C) throughout the month of May.

Heat index

May's mean heat index is estimated at a fiery hot 96.8°F (36°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially crucial for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in May is 73%.

Rainfall

In Williston, during May, the rain falls for 10.8 days and regularly aggregates up to 0.67" (17mm) of precipitation. In Williston, Florida, during the entire year, the rain falls for 127 days and collects up to 10.04" (255mm) of precipitation.

Snowfall

In Williston, Florida, snow does not fall in February through December.

Daylight

In Williston, the average length of the day in May is 13h and 38min.
On the first day of the month, sunrise is at 6:47 am and sunset at 8:06 pm. On the last day of May, in Williston, Florida, sunrise is at 6:30 am and sunset at 8:24 pm EDT.

Sunshine

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

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: During May, 7 as the daily maximum UV index converts into the following advice:
Deflect overexposure. Sun protection is a necessity. 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. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

Is it hot in Williston during May?

An average high-temperature, in May, in Williston, is 85.8°F (29.9°C) and the average low-temperature is 67.3°F (19.6°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in May is estimated at 96.8°F (36°C).

What is the average humidity in May in Williston?

In May, the average relative humidity is 73%.

How much does it rain in Williston in May?

In Williston, Florida, in May, during 10.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

When it does not snow in Williston?

In Williston, Florida, snow does not fall in February through December.

How many hours of daylight does Williston have in May?

In May, the average day length in Williston is 13h and 38min.

When are sunrise and sunset in May in Williston?

On the first day of May, sunrise is at 6:47 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 8:24 pm EDT.

What are the months with the most sunshine in Williston?

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

How long on average sun shines in May in Williston?

In Williston, the average sunshine duration in May is 10.7h.

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

The months with the highest UV index in Williston, Florida, are May through August, with an average maximum UV index of 7.

What is the UV index reading in May in Williston?

In Williston, the average daily maximum UV index in May is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Williston, FL

Average temperature in May - Williston, FL
  • Average high temperature in May: 85.8°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (64.9°F).

  • Average low temperature in May: 67.3°F

The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).

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Average pressure in May
Williston, FL

Average pressure in May - Williston, FL
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

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Average wind speed in May
Williston, FL

Average wind speed in May - Williston, FL
  • Average wind speed in May: 6.2mph

The windiest months (with the highest average wind speed) are March and April (7mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).

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Average humidity in May
Williston, FL

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

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

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Average rainfall in May
Williston, FL

Average rainfall in May - Williston, FL
  • Average rainfall in May: 0.67"

The wettest month (with the highest rainfall) is July (1.73").
The driest month (with the least rainfall) is March (0.28").

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Average rainfall days in May
Williston, FL

Average rainfall days in May - Williston, FL
  • Average rainfall days in May: 10.8 days

The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (5.1 days).

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Average snowfall days in May
Williston, FL

Average snowfall days in May - Williston, FL
  • Average snowfall days in May: 0 days

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

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Average daylight in May /
Average sunshine in May
Williston, FL

Average daylight in May / Average sunshine in May - Williston, FL
  • Average daylight in May: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in May: 10h and 4min

The months with the most sunshine are May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in May
Williston, FL

Average sunshine days in May - Williston, FL
  • Average sunshine days in May: 16.3 days

The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is July (7.3 days).

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Average UV index in May
Williston, FL

Average UV index in May - Williston, FL
  • Average UV index in May: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

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Average cloud cover in May
Williston, FL

Average cloud cover in May - Williston, FL
  • Average cloud cover in May: 28

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

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Average visibility in May
Williston, FL

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

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

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Williston, Florida, USA

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