5-day weather forecast Grožnjan Sep 26, 2026

20°16° · Sunny

Weather forecast Grožnjan Saturday Sep 26, 2026: sunny, temperature from 16 °C to 20 °C.

Precipitation probability 14%. Wind up to 4.5 m/s (gusts 8.81 m/s). Air humidity 52–69%, atmospheric pressure 764–767 mm Hg, UV index up to 4.6.

Weather Alerts

ModerateSep 23, 08:48 AM — Sep 24, 11:59 PMTranslate with Google

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.

ModerateSep 24, 07:15 AM — Sep 24, 11:59 PMTranslate with Google

Moderate Thunderstorms Warning (Degree 2/4) - Slovenia / South-West

Moderate Thunderstorms Warning

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.

ModerateSep 23, 08:40 AM — Sep 25, 11:59 AMTranslate with Google

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.

ModerateSep 24, 08:16 AM — Sep 25, 08:59 AMTranslate with Google

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.

ModerateSep 24, 07:40 AM — Sep 25, 01:59 PMTranslate with Google

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 06:57
Sunset 18:55

Full Moon99% illuminated
Moonrise 18:36 · Moonset 06:40

Chart

Table

← Fri, Sep 25

Sat, Sep 26, 2026

Sun, Sep 27 →

Forecast from 16 °C to 20 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	18	17	17	17	16	16	16	16	16	17	18	18	19	19	19	20	20	20	20	20	20	19	19	18
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	5	5	5	0	1	5	5	4	0	4	5	0	0	0	0	0	0	3	5	5	14	39	90	69
Rain chance (%)	4	4	4	4	5	6	6	5	4	3	3	2	2	3	3	3	3	3	3	3	4	6	14	11

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	2.81	2.19	2	2.11	2.5	2.69	2.89	2.69	2.81	2.5	2.11	2.19	3.19	3.81	4.19	4.5	4.19	3.81	3.31	2.81	2.61	2.69	2.81	2.69
Wind gust (m/s)	6.81	7.19	6	6.11	7.5	5.69	2.89	2.81	2.92	2.61	2.44	2.5	7.19	8.81	8.19	7.5	8.19	3.81	3.53	3	2.81	2.92	2.89	2.72
Wind direction (°)	ESE 111°	ESE 104°	E 90°	ENE 72°	ENE 65°	NE 51°	NE 47°	NE 39°	NE 39°	NE 41°	NNE 27°	NNW 347°	NNW 328°	NW 325°	NW 318°	NW 314°	NW 314°	NW 319°	NW 322°	NNW 337°	N 1°	NNE 20°	NE 41°	NE 49°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	61	61	61	63	66	68	69	67	62	57	53	52	54	57	59	60	59	58	58	59	59	60	63	65

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	767	767	767	766	766	766	766	766	766	766	766	766	766	766	766	765	765	764	764	765	765	765	766	766

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0.2	0.8	1.8	3.1	4.2	4.6	4.3	3.3	2	0.9	0.3	0	0	0	0	0

Air quality & pollen

Air quality
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
PM2.5 (µg/m³)	4.4	4.5	4.5	4.6	4.6	4.6	4.4	4.1	4	3.8	3.3	3.5	3.5	3.3	3.3	3.8	4	4	4.3	4.5	5	5.5	5.5	5.6
PM10 (µg/m³)	7.1	7	7	7.1	7.1	6.9	6.7	6.6	6.5	5.8	5.5	5.8	5.2	5	5.4	5.8	6	5.9	6.4	6.8	8.3	8.1	8.3	8.3
Ozone (O₃) (µg/m³)	59	57	55	54	55	55	54	53	51	59	68	70	74	82	87	89	91	91	82	77	81	73	65	60
NO₂ (µg/m³)	4.1	4.1	3.9	3.4	3	2.9	2.8	2.6	2.5	1.8	1.1	0.9	0.8	0.7	0.7	0.8	1	1.2	1.7	2.7	3.1	4.6	4.6	4.6
SO₂ (µg/m³)	0.5	0.5	0.5	0.4	0.3	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.2	0.2	0.2
CO (µg/m³)	179	178	178	177	177	176	175	174	175	173	169	167	165	164	163	162	162	161	162	164	163	168	173	176

← Fri, Sep 25

Sat, Sep 26, 2026

Sun, Sep 27 →

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.

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