May weather forecastPalermo, Italy
May
Weather in May
May brings significant alterations to Palermo's weather, manifesting in conspicuous signs of early summer. Daylight stretches to 14.2 hours with high temperatures soaring to 20.9°C (69.6°F), making outdoor activities delightful. The drop in relative humidity to 72% offers a more comfortable environment, alleged by decreasing cloud cover to 20%. Complementing these changes, the sea temperature inches up to 18.8°C (65.8°F), welcoming beachgoers. The weather in June advances further into the grip of summer.Temperature
As May arrives, Palermo's weather shows a minor increase in high-temperatures, edging from April's refreshing 17.6°C (63.7°F) to an agreeable 20.9°C (69.6°F). May in Palermo generally records an average low-temperature of 12.8°C (55°F).Humidity
In Palermo, the average relative humidity in May is 72%.Rainfall
In Palermo, Italy, in May, during 7.6 rainfall days, 21mm (0.83") of precipitation is typically accumulated. Throughout the year, there are 121.2 rainfall days, and 381mm (15") of precipitation is accumulated.Snowfall
February through November are months without snowfall.Sea temperature
In Palermo, the average seawater temperature in May is 18.8°C (65.8°F).Note: In 18.8°C (65.8°F), swimming is not an enjoyable activity for most. As the temperature decreases from 21°C (69.8°F) to 15°C (59°F), it becomes harder to control breathing.
Daylight
In May, the average length of the day is 14h and 14min.On the first day of the month, sunrise is at 06:09 and sunset at 19:57. On the last day of May, in Palermo, sunrise is at 05:45 and sunset at 20:23 CEST.
Sunshine
In Palermo, the average sunshine in May is 11.2h.UV index
In Palermo, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In May, an average UV index of 5 transforms into the following instructions:
Heed the precautions - Suggestions to avoid sunburn are made. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Palermo, Italy
- Average high temperature in May: 20.9°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is February (12.5°C).
- Average low temperature in May: 12.8°C
The month with the highest average low temperature is August (22°C).
The coldest month (with the lowest average low temperature) is February (6.8°C).
Average pressure in May
Palermo, Italy
- Average pressure in May: 1014.9mbar
The month with the highest atmospheric pressure is December (1019mbar).
The months with the lowest atmospheric pressure are April and July (1014.3mbar).
Average wind speed in May
Palermo, Italy
- Average wind speed in May: 9.7km/h
The windiest month (with the highest average wind speed) is February (13.9km/h).
The calmest month (with the lowest average wind speed) is August (7.8km/h).
Average humidity in May
Palermo, Italy
- Average humidity in May: 72%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is July (59%).
Average rainfall in May
Palermo, Italy
- Average rainfall in May: 21mm
The wettest months (with the highest rainfall) are September and October (57mm).
The driest month (with the least rainfall) is July (5mm).
Average rainfall days in May
Palermo, Italy
- Average rainfall days in May: 7.6 days
The month with the highest number of rainy days is January (13.6 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in May
Palermo, Italy
- Average snowfall in May: 0mm
The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in May
Palermo, Italy
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Palermo, Italy
- Average sea temperature in May: 18.8°C
The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is February (14.3°C).
Average daylight in May /
Average sunshine in May
Palermo, Italy
- Average daylight in May: 14h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 11h and 12min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in May
Palermo, Italy
- Average sunshine days in May: 21.6 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in May
Palermo, Italy
- Average UV index in May: 5
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in May
Palermo, Italy
- Average cloud cover in May: 20
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in May
Palermo, Italy
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
