May weather forecast
Keystone, FL

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Weather in May

May, the last month of the spring in Keystone, is also a moderately hot month, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 72.9°F (22.7°C).

Temperature

At the start of May, Keystone's average high-temperature reaches a still moderately hot 82.9°F (28.3°C), subtly different from the preceding month. During May, Keystone's temperature falls to a steady low-temperature average of 72.9°F (22.7°C).

Heat index

May's mean heat index is calculated to be a tropical 89.6°F (32°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

May is the least humid month, with an average relative humidity of 72%.

Rainfall

In Keystone, Florida, during May, the rain falls for 9.2 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Keystone, Florida, during the entire year, the rain falls for 120.5 days and collects up to 9.45" (240mm) of precipitation.

Daylight

In Keystone, the average length of the day in May is 13h and 34min.
On the first day of the month, sunrise is at 6:49 am and sunset at 8:05 pm. On the last day of May, in Keystone, sunrise is at 6:33 am and sunset at 8:22 pm EDT.

Sunshine

With an average of 11.3h of sunshine, May has the most sunshine of the year.

UV index

May through September, 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 radiation for ordinary individuals.
Note: The maximum daily UV index, 7 in May, converts into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

How hot is it in Keystone in May?

The high-temperature, in May, in Keystone, is 82.9°F (28.3°C), while the low-temperature averages to 72.9°F (22.7°C). In May, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 89.6°F (32°C).

What is the least humid month in Keystone?

The least humid month in Keystone, Florida, is May, with an average relative humidity of 72%.

What is the average humidity in May in Keystone?

The average relative humidity in May in Keystone is 72%.

How much does it rain in Keystone in May?

In May, in Keystone, the rain falls for 9.2 days. Throughout May, 0.59" (15mm) of precipitation is accumulated.

What is the average length of the day in May in Keystone?

In Keystone, Florida, the average day length in May is 13h and 34min.

What time are sunrise and sunset in May in Keystone?

On the first day of May in Keystone, sunrise is at 6:49 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 8:22 pm EDT.

What month has the most sunshine in Keystone?

May has the most sunshine of the year in Keystone, Florida, with an average of 11.3h of sunshine.

How long on average sun shines in May in Keystone?

In Keystone, Florida, the average sunshine duration in May is 11.3h.

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

May through September, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index reading in May in Keystone?

In Keystone, Florida, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Keystone, FL

Average temperature in May - Keystone, FL
  • Average high temperature in May: 82.9°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (66°F).

  • Average low temperature in May: 72.9°F

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (54.5°F).

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Average pressure in May
Keystone, FL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

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Average wind speed in May
Keystone, FL

Average wind speed in May - Keystone, FL
  • Average wind speed in May: 8.1mph

The windiest months (with the highest average wind speed) are January, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

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Average humidity in May
Keystone, FL

Average humidity in May - Keystone, FL
  • Average humidity in May: 72%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in May
Keystone, FL

Average rainfall in May - Keystone, FL
  • Average rainfall in May: 0.59"

The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is March (0.2").

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Average rainfall days in May
Keystone, FL

Average rainfall days in May - Keystone, FL
  • Average rainfall days in May: 9.2 days

The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is November (5.5 days).

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

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

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in May: 11h and 2min

The month with the most sunshine is May (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

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Average sunshine days in May
Keystone, FL

Average sunshine days in May - Keystone, FL
  • Average sunshine days in May: 17.2 days

The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is July (6.7 days).

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Average UV index in May
Keystone, FL

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

The 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).

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Average cloud cover in May
Keystone, FL

Average cloud cover in May - Keystone, FL
  • Average cloud cover in May: 20

The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 20).

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Average visibility in May
Keystone, FL

Average visibility in May - Keystone, 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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Keystone, Florida, USA

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