May weather forecast and climate
Cardiff, AL

The last month of the spring, May, is also a moderately hot month in Cardiff, Alabama, with average temperature fluctuating between 61.2°F (16.2°C) and 81.7°F (27.6°C).

Temperature

In May, the average high-temperature marginally rises, from a warm 73.4°F (23°C) in April, to a still moderately hot 81.7°F (27.6°C). The average low-temperature, in Cardiff, Alabama, is 61.2°F (16.2°C).

Heat index

In May, the average heat index is appraised at a tropical 86.5°F (30.3°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. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, wind). 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 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.

Humidity

The average relative humidity in May is 73%.

Rainfall

In Cardiff, in May, during 14.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Cardiff, during the entire year, the rain falls for 173.7 days and collects up to 40" (1016mm) of precipitation.

Snowfall

In Cardiff snow does not fall in April through October.

Daylight

In May, the average length of the day in Cardiff is 13.9h.

Sunshine

The average sunshine in Cardiff is 10h.

UV index

The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
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 Cardiff?

In May, in Cardiff, the average high-temperature is 81.7°F (27.6°C), and the average low-temperature is 61.2°F (16.2°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in May is calculated to 86.5°F (30.3°C).

What is the average humidity in May in Cardiff?

In May, the average relative humidity in Cardiff is 73%.

How many days does it rain in May in Cardiff?

In Cardiff, in May, during 14.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

When it does not snow in Cardiff?

In Cardiff, Alabama, snow does not fall in April through October.

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

The average length of the day in May is 13.9h.

How many hours of sunshine does Cardiff have in May?

In Cardiff, the average sunshine in May is 10h.

How high is the UV index in May in Cardiff?

The average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in May - Cardiff, AL
  • Average high temperature in May: 81.7°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (50.9°F).

  • Average low temperature in May: 61.2°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in May - Cardiff, AL
  • Average pressure in May: 30.01"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.98").

Average wind speed in May - Cardiff, AL
  • Average wind speed in May: 5.7mph

The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in May - Cardiff, AL
  • Average humidity in May: 73%

The month with the highest relative humidity is December (79%).
Months with the lowest relative humidity are September and October (71%).

Average rainfall in May - Cardiff, AL
  • Average rainfall in May: 3.11"

The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is October (2.24").

Average rainfall days in May - Cardiff, AL
  • Average rainfall days in May: 14.8 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (9.6 days).

Average snowfall in May - Cardiff, AL
  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.79").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in May - Cardiff, AL
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.4 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Cardiff, AL
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in May: 10h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in May - Cardiff, AL
  • Average sunshine days in May: 13.8 days

The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is July (7.5 days).

Average UV index in May - Cardiff, AL
  • Average UV index in May: 6

The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in May - Cardiff, AL
  • Average cloud cover in May: 33

The month with the most cloud cover is February (Cloud cover 49).
Months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in May - Cardiff, AL
  • 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).