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Monthly climate in Gacko, Bosnia and Herzegovina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Gacko features a humid continental climate (Dfb). Temperatures typically range between -1 °C (30 °F) and 20 °C (69 °F) through the year, but rarely can drop to -24 °C (-11 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 1488 mm (58.6 inches) and receives 153 rainy days on the 1 mm (0.04 inches) threshold annually. Gacko enjoys an average of 3760 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in Gacko, Bosnia and Herzegovina

The warmest months in Gacko are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (63 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 2 °C (30 - 36 °F) throughout the day. On average each year, Gacko experiences 48 days above 25 °C (77.0 °F) and 85 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Gacko. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		18°C
(65°F)		20°C
(68°F)		24°C
(75°F)		26°C
(79°F)		33°C
(92°F)		34°C
(93°F)		35°C
(95°F)		29°C
(85°F)		24°C
(76°F)		19°C
(67°F)		12°C
(54°F)
Mean maximum8°C
(47°F)		14°C
(57°F)		18°C
(64°F)		21°C
(71°F)		23°C
(74°F)		28°C
(83°F)		31°C
(88°F)		32°C
(90°F)		28°C
(82°F)		23°C
(73°F)		17°C
(62°F)		11°C
(51°F)
Average high2°C
(36°F)		6°C
(44°F)		9°C
(49°F)		14°C
(57°F)		18°C
(64°F)		22°C
(73°F)		25°C
(78°F)		27°C
(81°F)		22°C
(71°F)		16°C
(62°F)		11°C
(51°F)		5°C
(40°F)
Daily mean-1°C
(30°F)		2°C
(36°F)		4°C
(40°F)		8°C
(47°F)		13°C
(55°F)		17°C
(63°F)		19°C
(67°F)		20°C
(69°F)		15°C
(60°F)		10°C
(51°F)		6°C
(44°F)		2°C
(35°F)
Average low-5°C
(24°F)		-1°C
(30°F)		-0°C
(32°F)		3°C
(38°F)		8°C
(46°F)		12°C
(53°F)		14°C
(57°F)		14°C
(58°F)		10°C
(51°F)		5°C
(42°F)		3°C
(37°F)		-1°C
(30°F)
Mean minimum-14°C
(6°F)		-11°C
(13°F)		-9°C
(16°F)		-4°C
(25°F)		2°C
(35°F)		7°C
(45°F)		10°C
(50°F)		10°C
(50°F)		4°C
(39°F)		0°C
(33°F)		-4°C
(26°F)		-9°C
(16°F)
Minimum-24°C
(-11°F)		-14°C
(6°F)		-16°C
(4°F)		-10°C
(15°F)		-1°C
(30°F)		4°C
(40°F)		8°C
(47°F)		8°C
(47°F)		1°C
(33°F)		-2°C
(30°F)		-7°C
(20°F)		-12°C
(11°F)

Compare climate in Gacko with other places

Compare temperature, precipitation, sunshine, UV index in Gacko, Bosnia and Herzegovina with other places around the world.

Monthly average precipitation in Gacko, Bosnia and Herzegovina

Gacko usually has the most precipitation in February, November and December, with an average of 13 rainy days and 189 mm (7.4 inches) of precipitation per month. The driest months in Gacko are July, August and September. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Gacko. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)110 (4.3)153 (6.0)141 (5.6)118 (4.7)132 (5.2)95 (3.8)71 (2.8)58 (2.3)86 (3.4)110 (4.3)197 (7.7)216 (8.5)
Average precipitation days (≥ 1 mm)12131313181611101091216

Monthly sunshine hours in Gacko, Bosnia and Herzegovina

The sunniest months in Gacko are June, July and August, when the sun shines an average of 13 hours 29 minutes a day. Least sunny months in Gacko: January, November and December receive an average of 6 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Gacko. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours181228306343388408431401341306223198
Mean daily daylight hours9h 23m10h 30m11h 57m13h 25m14h 40m15h 18m14h 58m13h 52m12h 27m10h 59m9h 41m9h 1m

Solar UV radiation in Gacko, Bosnia and Herzegovina

Gacko experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November 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 Gacko UV Index data.

Average daily maximum UV levels by month for Gacko. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)24779101098632