Croatia (Istria) · May
Low seasonCroatia · Europe
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 10° (50°)5– (41–)15 (59) | 11° (52°)4– (39–)15 (59) | 14° (57°)8– (46–)19 (66) | 18° (64°)11– (52–)23 (73) | 22° (72°)15– (59–)27 (81) | 27° (81°)21– (70–)32 (90) | 30° (86°)25– (77–)35 (95) | 30° (86°)22– (72–)34 (93) | 25° (77°)18– (64–)30 (86) | 20° (68°)14– (57–)24 (75) | 15° (59°)9– (48–)20 (68) | 12° (54°)6– (43–)16 (61) |
Ø night, range from coldest to warmest nightØ nightrange | 2° (36°)-4– (25–)10 (50) | 3° (37°)-4– (25–)9 (48) | 5° (41°)-3– (27–)11 (52) | 8° (46°)1– (34–)14 (57) | 12° (54°)6– (43–)18 (64) | 17° (63°)11– (52–)21 (70) | 19° (66°)14– (57–)23 (73) | 19° (66°)13– (55–)24 (75) | 16° (61°)9– (48–)20 (68) | 12° (54°)5– (41–)17 (63) | 8° (46°)-1– (30–)14 (57) | 4° (39°)-3– (27–)11 (52) |
☀️Sunshine | 3h UV 3 | 4h UV 4 | 6h UV 5 | 7h UV 6 | 7h UV 7 | 9h UV 8 | 9h UV 8 | 8h UV 7 | 6h UV 6 | 5h UV 4 | 3h UV 3 | 3h UV 2 |
🌊Water Temp | 13° (55°) | 12° (54°) | 12° (54°) | 14° (57°) | 18° (64°) | 22° (72°) | 24° (75°) | 25° (77°) | 22° (72°) | 20° (68°) | 17° (63°) | 15° (59°) |
🌧Rain Days | 6d73mm (2.9") | 7d82mm (3.2") | 6d67mm (2.6") | 6d57mm (2.2") | 7d81mm (3.2") | 4d51mm (2.0") | 3d39mm (1.5") | 5d67mm (2.6") | 6d108mm (4.3") | 6d80mm (3.1") | 8d144mm (5.7") | 7d108mm (4.3") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Still off-season — flights and hotels significantly cheaper than in June.
May in Croatia (Istria) at 22°C (72°F) is too cool for a beach holiday, but suitable for sightseeing and hiking. The best travel months are June, July, August, and September.
Daytime highs average 22°C (72°F), cooling to 12°C (54°F) at night (daily average: 18°C (64°F)). Peaks reach around 27°C (81°F), the coldest nights around 6°C (43°F). The sun shines an average of 7 hours per day; there are 7 rain days with 81 mm (3.2 in) total. The sea is 18°C (64°F) — refreshing and manageable for confident swimmers.
A jacket for cool evenings should not be left behind. Sightseeing and excursions can be enjoyed comfortably at this time of year.
The hinterland comes alive: Motovun and Grožnjan on their hilltops, asparagus in every konoba, olive groves in fresh green. On the coast it is ideal for cycling at 18 to 22°C (64 to 72°F), though at 12 to 17°C (54 to 63°F) the sea is still cold.
Packing list for Croatia (Istria) in May
- Long-sleeved shirts and light trousers
- Light jacket
- Sunscreen
- Sunglasses
- Light umbrella or rain poncho
- Travel first-aid kit
Frequently Asked Questions
- Is May a good time to visit Croatia (Istria)?
- May is not an optimal month for Croatia (Istria) (Score: 60/100), but it is manageable. For better conditions, consider June, July, August, and September.
- How warm is it in Croatia (Istria) in May?
- In May, Croatia (Istria) sees daily highs of 22°C (72°F). Nights cool to 12°C (54°F), with a daily average of 18°C (64°F). Peaks reach around 27°C (81°F), the coldest nights around 6°C (43°F).
- How much rain falls in Croatia (Istria) in May?
- In May, Croatia (Istria) receives an average of 81 mm (3.2 in) of rain over 7 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Croatia (Istria) get in May?
- Croatia (Istria) averages 7 sunshine hours per day in May — above the annual average.
- How warm is the water in Croatia (Istria) in May?
- Water temperature in Croatia (Istria) in May averages 18°C (64°F) — refreshing but slightly cool for sensitive swimmers.
