7.1 /10
Good

May is a good month in Trieste

Climate Overview

Trieste, Italy in May has warm conditions, with highs averaging 20.4°C (69°F). Rain falls on about 17 days this month, totalling around 156 mm. Sea temperature stays cool at 18°C (64°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 19°C (66°F) at the start to 22°C (72°F) by month's end.

May sees fairly even rainfall, totalling about 156 mm across the month.

Expect around 10.6h of sunshine at the start of May, increasing to 12.3h by the end.

The warmest days tend to fall around the 27th, averaging 22.6°C (73°F).

Compared to April, this month is about 4°C warmer with 6 more rainy days. Temperatures will rise further into June.

LIVE Current Weather Local Time
LIVE Air Quality

Monthly May Averages

Temperature
20°C / 13°C
Feels Like
21°C / 11°C
Rain
17 days · 156 mm
Sunshine
11.2h / day
Humidity
75% — Humid
Wind
16 km/h
Wind Direction
E (92°)
Gusts
34 km/h
Daylight
14.9 h
Cloud Cover
63%
Clear Sky Days
2.1
UV Index
6 — High
Sea Temperature
18°C
Dew Point
12°C — Comfortable
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

28°C 24°C 20°C 16°C 12°C 8°C 4°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 10 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202531
Wind Speed
Sun Position
Sunrise 05:36
Daylight 14.9h
Sunset 20:30

What to Expect

Daytime temperatures around 20°C (69°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
8°C / 2°C
Feels Like
5°C / -2°C
Rain
10days (108 mm) Wet
Sun
5.5h Fair
Humidity
79% Humid
UV
1.5 Low
Snow Days
5days
February
Poor
Temp
10°C / 3°C
Feels Like
7°C / -1°C
Rain
9days (110 mm) Wet
Sun
6.4h Fair
Humidity
77% Humid
UV
2.3 Moderate
Snow Days
3days
March
Fair
Temp
13°C / 5°C
Feels Like
11°C / 2°C
Rain
10days (106 mm) Wet
Sun
8.7h Good
Humidity
71% Muggy
UV
3.6 Moderate
Snow Days
2days
April
Good
Temp
17°C / 8°C
Feels Like
15°C / 6°C
Rain
11days (106 mm) Wet
Sun
10.3h Excellent
Humidity
70% Muggy
UV
5.1 High
Snow Days
1days
May
Good
Temp
20°C / 13°C
Feels Like
21°C / 11°C
Rain
17days (156 mm) Wet
Sun
11.2h Excellent
Humidity
75% Muggy
UV
6 High
June best
Excellent
Temp
26°C / 18°C
Feels Like
28°C / 19°C
Rain
10days (100 mm) Wet
Sun
12.9h Excellent
Humidity
72% Muggy
UV
7 High
July best
Excellent
Temp
28°C / 20°C
Feels Like
31°C / 21°C
Rain
11days (93 mm) Wet
Sun
13h Excellent
Humidity
68% Muggy
UV
6.9 High
August best
Excellent
Temp
29°C / 20°C
Feels Like
31°C / 21°C
Rain
9days (107 mm) Wet
Sun
11.8h Excellent
Humidity
68% Muggy
UV
6.1 High
September best
Excellent
Temp
23°C / 16°C
Feels Like
24°C / 15°C
Rain
12days (198 mm) Wet
Sun
9.6h Good
Humidity
74% Muggy
UV
4.7 Moderate
October
Good
Temp
19°C / 12°C
Feels Like
18°C / 10°C
Rain
12days (160 mm) Wet
Sun
7.7h Good
Humidity
79% Humid
UV
3 Moderate
November
Wet
Temp
13°C / 7°C
Feels Like
11°C / 4°C
Rain
13days (186 mm) Wet
Sun
5.8h Fair
Humidity
81% Humid
UV
1.9 Low
Snow Days
1days
December
Poor
Temp
9°C / 3°C
Feels Like
7°C / 0°C
Rain
9days (122 mm) Wet
Sun
5.1h Fair
Humidity
81% Humid
UV
1.4 Low
Snow Days
3days
Month Temp Feels Like Rain Sun Humidity UV Status Details
January 8°C / 2°C 5°C / -2°C 10days (108 mm) Wet 5.5h Fair 79% Humid 1.5 Low Poor View Details
February 10°C / 3°C 7°C / -1°C 9days (110 mm) Wet 6.4h Fair 77% Humid 2.3 Moderate Poor View Details
March 13°C / 5°C 11°C / 2°C 10days (106 mm) Wet 8.7h Good 71% Muggy 3.6 Moderate Fair View Details
April 17°C / 8°C 15°C / 6°C 11days (106 mm) Wet 10.3h Excellent 70% Muggy 5.1 High Good View Details
May 20°C / 13°C 21°C / 11°C 17days (156 mm) Wet 11.2h Excellent 75% Muggy 6 High Good View Details
June best 26°C / 18°C 28°C / 19°C 10days (100 mm) Wet 12.9h Excellent 72% Muggy 7 High Excellent View Details
July best 28°C / 20°C 31°C / 21°C 11days (93 mm) Wet 13h Excellent 68% Muggy 6.9 High Excellent View Details
August best 29°C / 20°C 31°C / 21°C 9days (107 mm) Wet 11.8h Excellent 68% Muggy 6.1 High Excellent View Details
September best 23°C / 16°C 24°C / 15°C 12days (198 mm) Wet 9.6h Good 74% Muggy 4.7 Moderate Excellent View Details
October 19°C / 12°C 18°C / 10°C 12days (160 mm) Wet 7.7h Good 79% Humid 3 Moderate Good View Details
November 13°C / 7°C 11°C / 4°C 13days (186 mm) Wet 5.8h Fair 81% Humid 1.9 Low Wet View Details
December 9°C / 3°C 7°C / 0°C 9days (122 mm) Wet 5.1h Fair 81% Humid 1.4 Low Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesSunscreen (SPF 30+)Sunglasses

Frequently Asked Questions

May is typically good for visiting Trieste, with average highs of 20°C (69°F) and around 17 rainy days. Trieste, Italy in May has warm conditions, with highs averaging 20.4°C (69°F). Rain falls on about 17 days this month, t
Trieste typically sees around 17 rainy days in May with 156 mm (6.1 in) of total rainfall. Pack a waterproof jacket.
Evenings in Trieste during May are mild at 13°C (55°F). A light cardigan is usually enough.
With highs of 20°C (69°F) and lows of 13°C (55°F) in May, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. Comfortable walking shoes are essential.
May is not the most favourable month weather-wise in Trieste. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Trieste during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Trieste gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.
Snow is uncommon in Trieste during May based on 10-year climate averages.

Last updated: