May weather forecast
Trieste, Italy

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The boat-laden water channel in the heart of Trieste, located in Friuli Venezia Giulia, Italy, overlooking the busy Ponte Rosso city square
The boat-laden water channel in the heart of Trieste, located in Friuli Venezia Giulia, Italy, overlooking the busy Ponte Rosso city square

Weather in May

In May, Trieste starts to feel the warmth of the upcoming summer, bringing milder and pleasant weather conditions. Temperatures reach their year-high trend as the highest average temperature scales up to 19.4°C (66.9°F) and the lowest average is a comfy 11.3°C (52.3°F). The landscape of Trieste comes alive with greenery, and with longer sunshine hours, outdoor activities become a norm. However, May also marks the onset of the wet season, with rainfall significantly higher than April.

Temperature

Trieste, Italy, observes a slight ascent in average high-temperatures during May, adjusting from a mild 15.8°C (60.4°F) in April to a comfortable 19.4°C (66.9°F). During May, Trieste witnesses a consistent average low-temperature of 11.3°C (52.3°F).

Humidity

In Trieste, Italy, the average relative humidity in May is 74%.

Rainfall

In May, in Trieste, the rain falls for 21.3 days. Throughout May, 100mm (3.94") of precipitation is accumulated. Throughout the year, in Trieste, there are 177.7 rainfall days, and 1019mm (40.12") of precipitation is accumulated.

Snowfall

April through November are months without snowfall.

Sea temperature

In Trieste, the average seawater temperature in May is 18°C (64.4°F).
Note: Most people do not enjoy swimming in water of 18°C (64.4°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

In May, the average length of the day is 14h and 56min.
On the first day of May, sunrise is at 05:51 and sunset at 20:12. On the last day of the month, sunrise is at 05:19 and sunset at 20:46 CEST.

Sunshine

The average sunshine in May is 10.1h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.

Frequently asked questions

What is the average May temperature in Trieste?

The high-temperature, in May, in Trieste, is 19.4°C (66.9°F), while the low-temperature averages to 11.3°C (52.3°F).

What is the average humidity in May in Trieste?

In May, the average relative humidity is 74%.

How many days does it rain in May in Trieste?

In May, in Trieste, the rain falls for 21.3 days. Throughout May, 100mm (3.94") of precipitation is accumulated.

When it does not snow in Trieste?

April through November are months without snowfall in Trieste, Italy.

What is the sea water temperature in May in Trieste?

In May, the average sea temperature in Trieste, Italy, is 18°C (64.4°F). Swimming in 18°C (64.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Trieste have in May?

In May, the average day length in Trieste is 14h and 56min.

When are sunrise and sunset in May in Trieste?

On the first day of May, sunrise is at 05:51 and sunset at 20:12. On the last day of the month, sunrise is at 05:19 and sunset at 20:46 CEST.

How long on average sun shines in May in Trieste?

The average sunshine duration in May in Trieste is 10.1h.

How high is the UV index in May in Trieste?

In Trieste, Italy, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Trieste, Italy

Average temperature in May - Trieste, Italy
  • Average high temperature in May: 19.4°C

The warmest month (with the highest average high temperature) is August (27.2°C).
The month with the lowest average high temperature is January (5.9°C).

  • Average low temperature in May: 11.3°C

The month with the highest average low temperature is August (18.1°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).

Average pressure in May
Trieste, Italy

Average pressure in May - Trieste, Italy
  • Average pressure in May: 1014.7mbar

The month with the highest atmospheric pressure is December (1019.8mbar).
The months with the lowest atmospheric pressure are May, June and July (1014.7mbar).

Average wind speed in May
Trieste, Italy

Average wind speed in May - Trieste, Italy
  • Average wind speed in May: 9km/h

The windiest month (with the highest average wind speed) is February (11.7km/h).
The calmest months (with the lowest average wind speed) are June, July and August (8.6km/h).

Average humidity in May
Trieste, Italy

Average humidity in May - Trieste, Italy
  • Average humidity in May: 74%

The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is August (68%).

Average rainfall in May
Trieste, Italy

Average rainfall in May - Trieste, Italy
  • Average rainfall in May: 100mm

The wettest month (with the highest rainfall) is November (129mm).
The driest month (with the least rainfall) is January (54mm).

Average rainfall days in May
Trieste, Italy

Average rainfall days in May - Trieste, Italy
  • Average rainfall days in May: 21.3 days

The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is January (10.9 days).

Average snowfall in May
Trieste, Italy

Average snowfall in May - Trieste, Italy
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (14mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in May
Trieste, Italy

Average snowfall days in May - Trieste, Italy
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in May
Trieste, Italy

Average sea temperature in May - Trieste, Italy
  • Average sea temperature in May: 18°C

The best months for swimming (with the highest average sea temperature) are July and August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (9.3°C).

Average daylight in May /
Average sunshine in May
Trieste, Italy

Average daylight in May / Average sunshine in May - Trieste, Italy
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are February and November (Average sunshine: 5h and 0min).

Average sunshine days in May
Trieste, Italy

Average sunshine days in May - Trieste, Italy
  • Average sunshine days in May: 6.6 days

The month with the most sunshine days is January (17 days).
The month with the least sunshine days is May (6.6 days).

Average UV index in May
Trieste, Italy

Average UV index in May - Trieste, Italy
  • Average UV index in May: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).

Average cloud cover in May
Trieste, Italy

Average cloud cover in May - Trieste, Italy
  • Average cloud cover in May: 35

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 19).

Average visibility in May
Trieste, Italy

Average visibility in May - Trieste, Italy
  • Average visibility in May: 10km

The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).

Trieste, Italy

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