5-day weather forecast Grožnjan Sep 27, 2026
21°Weather forecast Grožnjan Sunday Sep 27, 2026: sunny, temperature from 17 °C to 21 °C.
Precipitation probability 14%. Wind up to 2.81 m/s (gusts 7.19 m/s). Air humidity 50–66%, atmospheric pressure 764–766 mm Hg, UV index up to 4.5.
Weather Alerts
Moderate Thunderstorms Warning (Degree 2/4) - Slovenia / South-West
Moderate Thunderstorms Warning
Thunderstorms are possible, accompanied by local intense precipitation and gusty winds. Intense local showers with wind blasts and lightning strikes are possible. Torrential watercourses may rise quickly. Rainwater floods are possible.
Beware of approaching storm clouds. Do not linger in exposed locations, e.g. under trees or power lines. Wait in a safe place, as storms usually do not last long.
Moderate Thunderstorms Warning (Degree 2/4) - Slovenia / South-West
Moderate Thunderstorms Warning
Thunderstorms are possible, accompanied by local intense precipitation and gusty winds. Intense local showers with wind blasts and lightning strikes are possible. Torrential watercourses may rise quickly. Rainwater floods are possible.
Beware of approaching storm clouds. Do not linger in exposed locations, e.g. under trees or power lines. Wait in a safe place, as storms usually do not last long.
Yellow thunderstorm warning
Severe thundershowers locally.
STAY ALERT for possible heavy thunderstorms. Be especially careful in high-exposure areas such as mountains, forests, meadows and open grounds. Interruptions in outdoor activities are possible.
Yellow thunderstorm warning
Severe thundershowers locally.
STAY ALERT for possible heavy thunderstorms. Be especially careful in high-exposure areas such as mountains, forests, meadows and open grounds. Interruptions in outdoor activities are possible.
Yellow wind warning
Strong bura (NE wind) with gale force gusts.
STAY ALERT for debris carried by strong winds. Debris and tree branches carried by the wind may cause localised interruptions in outdoor activities.
5 days at a glance — tap a day to open it
Sunrise 06:58
Sunset 18:53
Sunset 18:53
Waning Gibbous96% illuminated
Moonrise 18:54 · Moonset 07:47
Moonrise 18:54 · Moonset 07:47
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Partly cloudy | 18 °C | 10% | 58% | 66% | 766 mm Hg | NE 45° 2.81 (2.92) m/s | 0 |
| 01:00 |  Cloudy | 18 °C | 14% | 84% | 66% | 766 mm Hg | NE 41° 2.61 (2.72) m/s | 0 |
| 02:00 | Cloudy | 18 °C | 11% | 66% | 66% | 766 mm Hg | NE 37° 2.69 (2.92) m/s | 0 |
| 03:00 |  Clear | 18 °C | 5% | 11% | 65% | 765 mm Hg | NE 36° 2.69 (2.83) m/s | 0 |
| 04:00 | Clear | 18 °C | 5% | 14% | 64% | 765 mm Hg | NE 36° 2.5 (2.72) m/s | 0 |
| 05:00 | Clear | 17 °C | 4% | 8% | 63% | 765 mm Hg | NE 36° 2.69 (2.72) m/s | 0 |
| 06:00 | Clear | 17 °C | 4% | 5% | 61% | 765 mm Hg | NE 36° 2.61 (2.64) m/s | 0 |
| 07:00 | Sunny | 17 °C | 4% | 5% | 60% | 765 mm Hg | NE 36° 2.61 (2.61) m/s | 0 |
| 08:00 | Sunny | 17 °C | 4% | 5% | 59% | 765 mm Hg | NE 42° 2.39 (2.42) m/s | 0.2 |
| 09:00 | Sunny | 18 °C | 3% | 5% | 56% | 765 mm Hg | NE 35° 2 (2.11) m/s | 0.7 |
| 10:00 | Sunny | 19 °C | 2% | 5% | 52% | 766 mm Hg | NNE 16° 1.61 (1.81) m/s | 1.8 |
| 11:00 | Sunny | 19 °C | 2% | 5% | 50% | 766 mm Hg | NNW 335° 1.39 (1.39) m/s | 3 |
| 12:00 | Sunny | 20 °C | 2% | 4% | 51% | 766 mm Hg | NW 311° 2.19 (7.19) m/s | 4.1 |
| 13:00 | Sunny | 20 °C | 2% | 0% | 53% | 765 mm Hg | NW 308° 2.61 (5.61) m/s | 4.5 |
| 14:00 | Sunny | 20 °C | 2% | 0% | 54% | 765 mm Hg | WNW 303° 2.5 (6.5) m/s | 4.2 |
| 15:00 | Sunny | 20 °C | 3% | 0% | 54% | 765 mm Hg | WNW 296° 2.11 (6.11) m/s | 3.3 |
| 16:00 | Sunny | 20 °C | 2% | 0% | 54% | 764 mm Hg | WNW 292° 1.69 (5.69) m/s | 2 |
| 17:00 | Sunny | 21 °C | 2% | 0% | 54% | 764 mm Hg | WNW 283° 1.39 (5.39) m/s | 0.9 |
| 18:00 | Sunny | 21 °C | 2% | 0% | 54% | 764 mm Hg | W 277° 1 (5) m/s | 0.2 |
| 19:00 | Clear | 20 °C | 3% | 0% | 55% | 764 mm Hg | WNW 287° 0.5 (0.61) m/s | 0 |
| 20:00 | Clear | 20 °C | 3% | 0% | 55% | 765 mm Hg | NE 42° 0.61 (3.61) m/s | 0 |
| 21:00 | Clear | 20 °C | 3% | 0% | 57% | 765 mm Hg | ENE 68° 1.61 (5.61) m/s | 0 |
| 22:00 | Clear | 20 °C | 3% | 0% | 59% | 765 mm Hg | E 79° 2 (6) m/s | 0 |
| 23:00 | Clear | 19 °C | 4% | 0% | 61% | 765 mm Hg | E 87° 2 (6) m/s | 0 |
Grožnjan on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.