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Best time to visit · Slovenia
On the climate data, the best time to visit Piran is April – September, scoring up to 87/100 with highs around 79°F (26°C) and 2.9 in (74 mm) of rain in June. March and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
Highs run from 46°F to 84°F across the year, and the yearly total is about 40.4 in (1027 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 46°F8°C | 47°F9°C | 55°F13°C | 63°F17°C | 71°F22°C | 79°F26°C | 84°F29°C | 84°F29°C | 75°F24°C | 66°F19°C | 56°F14°C | 48°F9°C |
| Avg low | 37°F3°C | 37°F3°C | 42°F6°C | 50°F10°C | 58°F14°C | 66°F19°C | 70°F21°C | 69°F21°C | 61°F16°C | 54°F12°C | 47°F8°C | 39°F4°C |
| Rain | 2.7 in68 mm | 3.2 in82 mm | 2.8 in72 mm | 2.7 in69 mm | 3.5 in89 mm | 2.9 in74 mm | 2.4 in60 mm | 3.1 in79 mm | 4.4 in113 mm | 4.0 in102 mm | 4.8 in123 mm | 3.8 in96 mm |
| Humidity | 83% | 81% | 78% | 74% | 73% | 71% | 65% | 66% | 71% | 79% | 83% | 82% |
| Cloud | 75% | 70% | 62% | 59% | 60% | 54% | 45% | 44% | 55% | 64% | 73% | 74% |
| Comfort | 50 | 53 | 69 | 85 | 84 | 87 | 86 | 84 | 82 | 81 | 62 | 52 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~256 m (840 ft) to Piran's ~3 m (10 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 46–48°F (8–9°C) and lows down to 37°F (3°C). About 9.7 in (246 mm) of rain falls across these months, 24% of the year's total. It holds the toughest stretch on our comfort score (December – February), averaging 52/100.
Temperatures climb through the season, from 55°F highs in March to 71°F by May. About 9.1 in (230 mm) of rain falls across these months, 22% of the year's total. Lows bottom out around 42°F (6°C). April & May are among the best-scoring months (season average 79/100).
Peak warmth: highs of 79–84°F (26–29°C). It's the driest season, with only about 8.4 in (213 mm) of rain, 21% of the year's total. Lows bottom out around 66°F (19°C). Comfort peaks here: June – August rank with the year's best, and the season averages 86/100.
Temperatures slide from 75°F highs in September to 56°F by November. It's the wettest season, with about 13.3 in (338 mm) of rain, 33% of the year's total. Lows bottom out around 47°F (8°C). September is among the best-scoring months (season average 75/100).
By comfort score: 7 Great, 2 Good and 3 Fair. Great months: April – October. Tap a month for its own guide.
On the climate data, the best time to visit Piran is April – September, scoring up to 87/100 with highs around 79°F (26°C) and 2.9 in (74 mm) of rain in June. March and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
November is the wettest month, averaging about 4.8 in (123 mm) of rain. July is the driest, with about 2.4 in (60 mm). The yearly total is around 40.4 in (1027 mm).
January is the coldest, with average lows of 37°F (3°C) and highs of 46°F (8°C). The warmest is July, with average highs of 84°F (29°C).
Not very: summer (June – August) humidity averages 67%, and highs peak around 84°F (29°C), so heat matters more than mugginess.
Not on average: even in January, the coldest month, lows average 37°F (3°C). Individual cold snaps can still dip lower.
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