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Monthly climate in Kastav, Croatia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Kastav features a oceanic climate (Cfb). Temperatures typically range between 1 °C (34 °F) and 21 °C (71 °F) through the year, but rarely can drop to -14 °C (7 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 1901 mm (74.9 inches) and receives 149 rainy days on the 1 mm (0.04 inches) threshold annually. Kastav enjoys an average of 3707 hours of sunshine throughout the year, and daylight varies from 8 hours 46 minutes to 15 hours 35 minutes per day.

Monthly average temperatures in Kastav, Croatia

The warmest months in Kastav are June, July and August, with daily mean temperatures ranging from 20 to 21 °C (68 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 4 °C (34 - 39 °F) throughout the day. On average each year, Kastav experiences 51 days above 25 °C (77.0 °F) and 65 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Kastav. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(53°F)		20°C
(69°F)		21°C
(71°F)		25°C
(77°F)		26°C
(79°F)		35°C
(95°F)		33°C
(91°F)		34°C
(94°F)		29°C
(85°F)		23°C
(74°F)		18°C
(65°F)		13°C
(56°F)
Mean maximum10°C
(50°F)		14°C
(58°F)		19°C
(66°F)		22°C
(72°F)		24°C
(75°F)		29°C
(84°F)		31°C
(87°F)		32°C
(91°F)		27°C
(82°F)		21°C
(71°F)		16°C
(61°F)		12°C
(54°F)
Average high5°C
(41°F)		8°C
(46°F)		11°C
(52°F)		15°C
(59°F)		18°C
(65°F)		24°C
(76°F)		26°C
(79°F)		27°C
(80°F)		21°C
(70°F)		16°C
(61°F)		10°C
(51°F)		6°C
(43°F)
Daily mean1°C
(34°F)		4°C
(39°F)		6°C
(43°F)		10°C
(51°F)		14°C
(58°F)		20°C
(68°F)		21°C
(70°F)		21°C
(71°F)		16°C
(62°F)		12°C
(53°F)		7°C
(45°F)		3°C
(38°F)
Average low-2°C
(29°F)		0°C
(33°F)		2°C
(35°F)		6°C
(43°F)		10°C
(51°F)		15°C
(60°F)		16°C
(62°F)		17°C
(63°F)		12°C
(54°F)		8°C
(47°F)		5°C
(41°F)		0°C
(33°F)
Mean minimum-8°C
(18°F)		-6°C
(21°F)		-5°C
(24°F)		-1°C
(31°F)		5°C
(41°F)		10°C
(49°F)		12°C
(54°F)		12°C
(54°F)		6°C
(42°F)		3°C
(38°F)		-2°C
(29°F)		-6°C
(22°F)
Minimum-14°C
(8°F)		-11°C
(12°F)		-14°C
(7°F)		-7°C
(20°F)		3°C
(37°F)		8°C
(46°F)		11°C
(51°F)		10°C
(50°F)		4°C
(39°F)		2°C
(35°F)		-5°C
(23°F)		-8°C
(18°F)

Compare climate in Kastav with other places

Compare temperature, precipitation, sunshine, UV index in Kastav, Croatia with other places around the world.

Monthly average precipitation in Kastav, Croatia

Kastav usually has the most precipitation in May, September and November, with an average of 15 rainy days and 217 mm (8.5 inches) of precipitation per month. The driest months in Kastav are January, June and July. On average, 106 mm (4.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kastav. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)91 (3.6)175 (6.9)128 (5.0)136 (5.4)214 (8.4)110 (4.3)117 (4.6)120 (4.7)219 (8.6)170 (6.7)217 (8.5)205 (8.1)
Average precipitation days (≥ 1 mm)81311112111141212111312

Monthly sunshine hours in Kastav, Croatia

The sunniest months in Kastav are June, July and August, when the sun shines an average of 13 hours 28 minutes a day. Least sunny months in Kastav: January, November and December receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kastav. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours179223312336365413429397321294221211
Mean daily daylight hours9h 9m10h 23m11h 56m13h 32m14h 53m15h 35m15h 13m14h 0m12h 29m10h 53m9h 29m8h 46m

Solar UV radiation in Kastav, Croatia

Kastav experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Kastav UV Index data.

Average daily maximum UV levels by month for Kastav. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235789987532