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Monthly climate in Opan, Bulgaria

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Opan features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (36 °F) and 26 °C (80 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 631 mm (24.9 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Opan enjoys an average of 3734 hours of sunshine throughout the year, and daylight varies from 9 hours 8 minutes to 15 hours 11 minutes per day.

Monthly average temperatures in Opan, Bulgaria

The warmest months in Opan are June, July and August, with daily mean temperatures ranging from 22 to 26 °C (72 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (36 - 42 °F) throughout the day. On average each year, Opan experiences 115 days above 25 °C (77.0 °F) and 51 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Opan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum16°C
(62°F)		20°C
(69°F)		24°C
(76°F)		29°C
(84°F)		35°C
(96°F)		38°C
(101°F)		41°C
(106°F)		42°C
(108°F)		37°C
(99°F)		35°C
(96°F)		26°C
(80°F)		19°C
(67°F)
Mean maximum14°C
(57°F)		18°C
(65°F)		22°C
(71°F)		26°C
(79°F)		31°C
(89°F)		35°C
(95°F)		38°C
(101°F)		38°C
(101°F)		35°C
(94°F)		28°C
(83°F)		23°C
(73°F)		17°C
(63°F)
Average high7°C
(45°F)		11°C
(51°F)		14°C
(57°F)		19°C
(67°F)		25°C
(77°F)		28°C
(83°F)		32°C
(90°F)		33°C
(92°F)		29°C
(84°F)		21°C
(71°F)		14°C
(58°F)		9°C
(49°F)
Daily mean2°C
(36°F)		5°C
(42°F)		8°C
(47°F)		13°C
(55°F)		19°C
(66°F)		22°C
(72°F)		26°C
(78°F)		26°C
(80°F)		22°C
(71°F)		15°C
(59°F)		10°C
(49°F)		5°C
(42°F)
Average low-2°C
(30°F)		1°C
(34°F)		3°C
(37°F)		7°C
(45°F)		12°C
(54°F)		16°C
(62°F)		19°C
(66°F)		19°C
(67°F)		15°C
(60°F)		10°C
(50°F)		6°C
(43°F)		2°C
(35°F)
Mean minimum-8°C
(17°F)		-6°C
(21°F)		-5°C
(23°F)		1°C
(34°F)		6°C
(43°F)		12°C
(54°F)		15°C
(60°F)		15°C
(60°F)		8°C
(46°F)		4°C
(40°F)		-1°C
(31°F)		-5°C
(23°F)
Minimum-17°C
(2°F)		-11°C
(12°F)		-19°C
(-2°F)		-1°C
(31°F)		4°C
(40°F)		9°C
(49°F)		13°C
(56°F)		13°C
(56°F)		5°C
(41°F)		2°C
(36°F)		-4°C
(24°F)		-6°C
(22°F)

Compare climate in Opan with other places

Compare temperature, precipitation, sunshine, UV index in Opan, Bulgaria with other places around the world.

Monthly average precipitation in Opan, Bulgaria

Opan usually has the most precipitation in June, October and December, with an average of 10 rainy days and 80 mm (3.2 inches) of precipitation per month. The driest months in Opan are April, August and September. On average, 26 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Opan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)47 (1.8)43 (1.7)63 (2.5)42 (1.7)52 (2.0)92 (3.6)48 (1.9)17 (0.7)18 (0.7)73 (2.9)60 (2.4)77 (3.0)
Average precipitation days (≥ 1 mm)779710158437710

Monthly sunshine hours in Opan, Bulgaria

The sunniest months in Opan are June, July and August, when the sun shines an average of 13 hours 22 minutes a day. Least sunny months in Opan: January, November and December receive an average of 6 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Opan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours172230286344392400426403342288230216
Mean daily daylight hours9h 28m10h 33m11h 57m13h 22m14h 35m15h 11m14h 52m13h 48m12h 26m11h 1m9h 46m9h 8m

Solar UV radiation in Opan, Bulgaria

Opan experiences the highest level of ultraviolet (UV) radiation in May, June 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 Opan UV Index data.

Average daily maximum UV levels by month for Opan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2468910997632