5-day weather forecast Grožnjan Sep 25, 2026

19°16° · Sunny

Weather forecast Grožnjan tomorrow Sep 25, 2026: sunny, temperature from 16 °C to 19 °C.

Precipitation probability 19%. Wind up to 8.69 m/s (gusts 10.11 m/s). Air humidity 51–72%, atmospheric pressure 765–767 mm Hg, UV index up to 4.4.

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 06:55
Sunset 18:57

Full Moon100% illuminated
Moonrise 18:20 · Moonset 05:34

Chart

Table

← Thu, Sep 24

Fri, Sep 25, 2026

Sat, Sep 26 →

Forecast from 16 °C to 19 °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)	19	18	18	18	18	17	16	16	16	16	17	18	18	18	19	19	19	19	19	19	19	19	19	18
Precipitation (mm/hr)	0	0	0	0.01	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 (%)	64	99	100	100	67	37	17	0	0	5	1	5	5	5	5	5	5	5	80	32	100	100	12	5
Rain chance (%)	13	19	19	18	10	7	6	5	5	4	3	3	2	3	3	2	2	2	9	4	12	12	4	4

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)	3.89	4.39	4.69	8.69	8.31	6.5	6.19	5.31	3.61	2.19	1.39	0.5	0.89	2	3.19	3.31	3.31	2.81	2.11	1.61	0.31	1.19	2.19	3
Wind gust (m/s)	4	4.72	5.72	9.83	10.11	7.92	7.69	6.11	3.89	2.33	1.83	1.22	3.89	5	8.19	6.31	6.31	6.81	6.11	1.72	0.75	4.19	7.19	7
Wind direction (°)	ENE 71°	ENE 65°	E 81°	ESE 103°	ESE 103°	E 93°	E 90°	E 87°	ENE 72°	ENE 60°	ENE 72°	ESE 116°	W 276°	W 268°	W 263°	W 277°	WNW 290°	WNW 285°	W 279°	W 271°	NNW 337°	ENE 72°	E 97°	ESE 109°

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 (%)	72	72	71	68	65	65	68	68	67	64	59	53	51	53	53	51	51	52	52	52	51	53	57	61

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)	765	765	765	765	765	766	767	767	767	767	767	767	767	767	767	766	766	766	766	766	767	767	767	767

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	0.7	1.5	2.7	3.8	4.4	4.2	3.2	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)	4.8	4.9	4.9	4.4	3.6	3.2	3.6	3.6	3.8	3.7	3.3	3.1	3.1	3.2	3.3	3.3	3.1	3.3	3.6	3.9	4.3	4.3	4.4	4.4
PM10 (µg/m³)	7.2	7.1	7.8	6.2	5.1	4.6	4.3	4.5	5	5	5	4.8	4.7	4.4	4.2	4.4	4.2	4.3	5.1	5.7	6.6	6.5	6.3	6.3
Ozone (O₃) (µg/m³)	65	60	59	65	70	67	65	65	62	64	70	77	78	81	81	84	86	85	81	76	70	66	66	63
NO₂ (µg/m³)	3.6	3.5	3.5	2.7	2.3	2.2	2.3	2.5	2.9	2.6	1.7	1.2	0.9	0.8	0.7	0.8	1	1.2	1.8	3.1	3.9	4.7	3.9	4
SO₂ (µg/m³)	0.5	0.4	0.4	0.4	0.3	0.4	0.4	0.4	0.4	0.4	0.4	0.3	0.2	0.2	0.2	0.2	0.3	0.3	0.2	0.2	0.3	0.4	0.4	0.5
CO (µg/m³)	177	180	180	174	171	173	174	176	176	172	170	166	164	162	162	162	164	166	166	170	176	175	177	177

← Thu, Sep 24

Fri, Sep 25, 2026

Sat, Sep 26 →

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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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