nomadseason

Monthly climate in Roja, Latvia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Roja features a humid continental climate (Dfb). Temperatures typically range between 0 °C (31 °F) and 18 °C (65 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 727 mm (28.6 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually. Roja enjoys an average of 3433 hours of sunshine throughout the year, and daylight varies from 6 hours 41 minutes to 17 hours 53 minutes per day.

Monthly average temperatures in Roja, Latvia

The warmest months in Roja are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (61 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 0 to 1 °C (31 - 35 °F) throughout the day. On average each year, Roja experiences 4 days above 25 °C (77.0 °F) and 66 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Roja. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(47°F)		10°C
(50°F)		10°C
(50°F)		15°C
(60°F)		22°C
(71°F)		27°C
(81°F)		28°C
(82°F)		28°C
(83°F)		24°C
(75°F)		18°C
(64°F)		13°C
(56°F)		9°C
(48°F)
Mean maximum6°C
(43°F)		6°C
(44°F)		8°C
(47°F)		13°C
(56°F)		19°C
(66°F)		21°C
(71°F)		25°C
(77°F)		24°C
(76°F)		22°C
(72°F)		16°C
(61°F)		12°C
(53°F)		7°C
(45°F)
Average high2°C
(35°F)		1°C
(34°F)		3°C
(38°F)		7°C
(45°F)		12°C
(54°F)		18°C
(65°F)		20°C
(69°F)		20°C
(68°F)		16°C
(61°F)		11°C
(53°F)		7°C
(45°F)		3°C
(37°F)
Daily mean0°C
(33°F)		-0°C
(31°F)		1°C
(35°F)		5°C
(41°F)		10°C
(50°F)		16°C
(61°F)		18°C
(65°F)		18°C
(64°F)		14°C
(58°F)		10°C
(50°F)		6°C
(42°F)		1°C
(35°F)
Average low-1°C
(30°F)		-2°C
(29°F)		-1°C
(31°F)		3°C
(37°F)		7°C
(45°F)		14°C
(57°F)		16°C
(61°F)		16°C
(60°F)		12°C
(55°F)		8°C
(47°F)		4°C
(40°F)		0°C
(33°F)
Mean minimum-7°C
(19°F)		-8°C
(18°F)		-6°C
(22°F)		-2°C
(30°F)		2°C
(36°F)		8°C
(47°F)		12°C
(54°F)		12°C
(54°F)		8°C
(46°F)		3°C
(38°F)		-1°C
(30°F)		-4°C
(25°F)
Minimum-12°C
(11°F)		-13°C
(9°F)		-13°C
(8°F)		-3°C
(27°F)		-0°C
(32°F)		6°C
(44°F)		11°C
(52°F)		11°C
(52°F)		5°C
(42°F)		2°C
(36°F)		-6°C
(22°F)		-9°C
(17°F)

Compare climate in Roja with other places

Compare temperature, precipitation, sunshine, UV index in Roja, Latvia with other places around the world.

Monthly average precipitation in Roja, Latvia

Roja usually has the most precipitation in August, September and October, with an average of 14 rainy days and 85 mm (3.4 inches) of precipitation per month. The driest months in Roja are February, April and May. On average, 40 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Roja. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)43 (1.7)41 (1.6)48 (1.9)36 (1.4)42 (1.7)54 (2.1)76 (3.0)87 (3.4)79 (3.1)91 (3.6)75 (3.0)56 (2.2)
Average precipitation days (≥ 1 mm)111013889111314171614

Monthly sunshine hours in Roja, Latvia

The sunniest months in Roja are May, June and July, when the sun shines an average of 15 hours 5 minutes a day. Least sunny months in Roja: January, November and December receive an average of 3 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Roja. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours7816926836245047146639731622913785
Mean daily daylight hours7h 22m9h 26m11h 52m14h 22m16h 38m17h 53m17h 13m15h 9m12h 43m10h 15m7h 58m6h 41m

Solar UV radiation in Roja, Latvia

Roja experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 6 - 7, which corresponds to the High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Roja UV Index data.

Average daily maximum UV levels by month for Roja. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123467764211