5-day weather forecast Grožnjan 17-08-2026

Weather forecast Grožnjan Monday, August 17 17.08.2026: sunny, temperature from 23 °C to 29 °C.

Precipitation probability 76%. Wind up to 7.31 m/s (gusts 11.33 m/s). Air humidity 52–80%, atmospheric pressure 756–759 mm Hg, UV index up to 7.

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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 06:08
Sunset 20:09

Waxing Crescent27% illuminated
Moonrise 11:45 · Moonset 21:59

Chart

Table

← Sun, Aug 16

Mon, Aug 17, 2026

Forecast from 23 °C to 29 °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)	23	23	23	23	23	23	23	23	25	27	28	29	29	29	29	29	29	29	29	29	27	26	26	25
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	0	0	0	0.08	0.06	3.16

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 (%)	17	21	7	9	14	8	6	5	4	13	0	0	0	2	2	2	9	78	14	44	13	73	70	80
Rain chance (%)	4	4	3	3	3	3	3	4	4	4	4	4	4	4	4	2	3	17	3	7	5	21	21	76

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)	3.61	3.19	3.61	2.69	2.5	3	3.19	2.89	3.69	2.61	4.81	4.81	5.61	5.89	5.11	4.19	4	4.5	5.11	6	6.61	6.31	7.31	4.19
Wind gust (m/s)	7.56	6.72	7.56	5.67	5.03	5.83	6.17	5.17	4.94	3.06	5.53	5.53	6.44	6.78	5.86	4.83	4.94	5.97	6.75	8.39	9.94	10.67	11.33	7.58
Wind direction (°)	E 92°	E 83°	E 88°	E 99°	SE 130°	ESE 118°	ESE 106°	ESE 102°	ESE 113°	ESE 110°	SSE 152°	S 179°	SSW 199°	SSW 210°	SSW 208°	SSW 192°	S 188°	S 183°	S 174°	S 173°	SE 137°	SE 137°	SE 145°	SE 135°

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 (%)	58	55	53	52	54	57	59	60	61	58	63	64	64	66	61	54	53	55	57	62	67	74	78	80

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)	759	759	759	758	759	759	758	759	759	759	759	759	759	759	758	758	758	757	757	757	756	756	756	757

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	0.7	1.7	3.3	5	6.2	6.8	6.4	7	7	6	7	6	7	0	0	0