5-day weather forecast Grožnjan 15-08-2026

Weather forecast Grožnjan Saturday, August 15 15.08.2026: sunny, temperature from 23 °C to 31 °C.

Precipitation probability 4%. Wind up to 3.31 m/s (gusts 5.89 m/s). Air humidity 28–50%, atmospheric pressure 759–762 mm Hg, UV index up to 7.1.

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SevereAug 13, 08:51 AM — Aug 14, 05:59 PMTranslate with Google

Severe High temperature Warning (Degree 3/4) - Slovenia / South-West

Severe High temperature Warning

High temperatures will affect the health of sensitive members of the population.

Stay in the shade at midday and in the afternoon, while intense physical effort is not recommended. Eat light food and drink enough liquids. Wear airy and light clothes. Drinking coffee, alcohol or very sweet drinks is not recommended. If you take medication for regulating blood pressure, consult your doctor. Air conditioning should be set to a temperature that is no more than 8 °C lower than the outside temperature. Domestic animals should have enough fresh water and shade. Living premises should be aired out at night and in the morning and sufficient air circulation should be ensured. We recommend shading premises externally. Vehicles parked in the sun should be aired out thoroughly before driving.

ExtremeAug 13, 08:51 AM — Aug 18, 12:59 AMTranslate with Google

Extreme Forestfire danger Warning (Degree 4/4) - Slovenia / South-West

Extreme Forestfire danger Warning

There is an extreme risk of forest and bush fire.

Stay very vigilant. Be ready to take action to protect yourself from a rapidly developing fire. The public are asked to exercise extreme caution in the countryside, and immediately notify emergency services on any fire.

5 days at a glance — tap a day to open it

Sunrise 06:06
Sunset 20:12

Waxing Crescent11% illuminated
Moonrise 09:09 · Moonset 21:17

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Table

← Fri, Aug 14

Sat, Aug 15, 2026

Sun, Aug 16 →

Forecast from 23 °C to 31 °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)	24	24	24	23	23	23	23	23	25	28	29	30	30	31	31	31	30	30	30	28	26	26	25	25
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 (%)	10	16	12	11	2	32	22	22	15	20	34	33	22	33	9	11	12	10	10	17	22	16	46	6
Rain chance (%)	1	2	2	1	1	2	2	2	1	1	2	2	1	2	1	1	1	1	1	2	3	2	4	2

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	2.69	2.69	2.19	2.31	2.61	2.31	2.19	1.69	1.11	1	1.5	2.19	2.89	3.31	3.31	3.11	2.5	1.89	1.19	0.5	2.39	2.5	2.19
Wind gust (m/s)	5.89	5.67	5.67	4.61	4.83	5.47	4.83	4.61	3.28	1.5	1.25	1.83	2.81	3.89	4.39	4.19	4	3.42	2.83	2.25	1.06	5.03	5.25	4.61
Wind direction (°)	ENE 59°	ENE 57°	NE 56°	NE 53°	NE 52°	ENE 63°	ENE 68°	ENE 66°	ENE 62°	NNE 33°	NNW 345°	WNW 301°	WNW 284°	W 269°	WSW 257°	WSW 241°	SW 227°	SW 216°	SW 214°	SW 219°	E 90°	E 86°	E 93°	ESE 108°

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 (%)	43	43	43	40	39	37	35	35	34	30	30	28	30	32	33	34	37	38	40	46	50	45	46	46

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)	762	761	761	761	761	761	761	761	761	761	761	761	761	761	760	760	760	759	759	759	759	759	760	760

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	0.2	0.8	1.9	3.5	5.3	6.6	7.1	6.6	5.1	3.6	2.1	0.9	0.3	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)	6.5	5.9	6.1	5.6	5.2	4.9	4.7	4.7	4.5	4.2	4.3	4.5	4.7	5.1	5	5.8	6.5	6.6	6.8	6.7	6.7	6.9	6.9	6.9
PM10 (µg/m³)	9.6	9.7	9	7.5	6.7	6.5	6.4	6.3	6.2	6.2	6.5	7	8.3	9.6	9.9	10.1	10.1	10.5	10.7	10.8	10.9	11.3	10.3	10
Ozone (O₃) (µg/m³)	63	67	57	59	63	67	68	68	65	71	82	85	96	99	104	110	117	117	112	103	99	96	86	76
NO₂ (µg/m³)	4.6	3.5	3.7	2.8	2.1	1.9	2.2	2.3	2.1	1.2	1	0.8	0.7	0.7	0.7	0.7	0.7	0.8	0.9	1.4	2.3	3.2	3.8	4.3
SO₂ (µg/m³)	0.4	0.5	0.5	0.3	0.3	0.3	0.3	0.4	0.3	0.4	0.4	0.4	0.5	0.5	0.5	0.5	0.5	0.5	0.6	0.6	0.6	0.6	0.6	0.5
CO (µg/m³)	139	143	142	140	140	139	138	139	141	138	140	139	139	140	141	144	144	144	143	144	145	146	147	146