Yuzhno-Kurilsk, located on Kunashir Island in the southern Kurils, experiences a humid continental climate with strong maritime influences. Winters are cold, snowy, and windy, while summers are cool, wet, and often foggy. The region is known for high humidity, frequent precipitation, and dramatic seasonal changes shaped by the Pacific Ocean and Sea of Okhotsk.
Yuzhno-Kurilsk’s climate is defined by its position between the cold Pacific Ocean and the Sea of Okhotsk, resulting in strong oceanic influences and pronounced seasonality. Winters (December–March) are cold and snowy, with average daily temperatures ranging from -4°C to 1°C and frequent strong winds. Snow cover is persistent, with average extreme depths reaching 12–19 cm in midwinter. The region lies in a transition zone between frigid Siberian air and milder, stormy Pacific systems, leading to variable winter weather and occasional blizzards. Relative humidity remains high, and skies are often cloudy, though winter is the driest season.
Summers (June–September) are cool, wet, and humid, with average highs of 14–18°C and frequent fog, drizzle, and rain. The warmest month is August, with mean daily maximums near 18°C and rare extremes above 22°C. Summer is also the cloudiest and most humid season, with fog from the Oyashio Current producing near-saturation humidity and frequent overcast days. Precipitation peaks in late summer and early autumn, especially in September, due to tropical weather systems and former typhoons. Annual precipitation averages 1,200–1,400 mm, with over 40% falling in summer. Sunshine is limited, especially in summer, but May and June offer the most daylight, with up to 15 hours per day. Winds can be strong year-round, with the highest gusts in late autumn and winter, sometimes reaching gale or hurricane force.
Spring and autumn are transitional, with spring being long and rainy, and autumn relatively dry and warm before the onset of winter storms. The climate supports lush vegetation, frequent fog, and dramatic coastal scenery, but weather can change rapidly, requiring travellers to be well-prepared for variable conditions.
| Average climate data for Yuzhno-Kurilsk, Russia | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | -2 | -2 | 0 | 3 | 8 | 11 | 16 | 18 | 17 | 13 | 7 | 2 | 18 |
| Average minimum temperature (°C) | -4 | -6 | -3 | 1 | 5 | 9 | 14 | 16 | 15 | 10 | 4 | -1 | -6 |
| Average precipitation (mm) | 48 | 39 | 61 | 51 | 66 | 64 | 73 | 95 | 68 | 102 | 54 | 69 | 791 |
| Average rainfall days (days) | 4 | 3 | 8 | 10 | 13 | 14 | 15 | 15 | 14 | 17 | 15 | 8 | 137 |
| Average snowfall (mm) | 100 | 87 | 126 | 48 | 4 | 0 | 0 | 0 | 0 | 0 | 28 | 83 | 476 |
| Average snowfall days (days) | 17 | 14 | 13 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 13 | 69 |
| Average relative humidity (%) | 74 | 78 | 82 | 81 | 86 | 89 | 93 | 88 | 81 | 75 | 73 | 70 | 81 |
| Average wind speed (km/h) | 28 | 26 | 22 | 21 | 19 | 17 | 15 | 16 | 19 | 24 | 26 | 30 | 22 |
| Average water temperature (°C) | 1 | -1 | -1 | 1 | 5 | 10 | 14 | 17 | 17 | 13 | 9 | 4 | 7 |
| Average daily daylight hours (h) | 9 | 10 | 11 | 13 | 14 | 15 | 15 | 14 | 12 | 11 | 9 | 9 | 12 |
| Average daily sunshine hours (h) | 2 | 3 | 5 | 8 | 7 | 7 | 6 | 7 | 7 | 5 | 4 | 3 | 5 |
| Average cloud coverage (%) | 78 | 70 | 58 | 47 | 52 | 58 | 63 | 59 | 45 | 47 | 60 | 69 | 59 |
| Average UV index | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 4 | 3 | 1 | 1 | 3 |
The best time to visit Yuzhno-Kurilsk is from late July to early September, when temperatures are mildest (14–18°C), rainfall is moderate, and daylight is long. These months offer the most comfortable conditions for hiking, sightseeing, and outdoor activities, though visitors should still be prepared for fog, wind, and occasional rain.
The least favourable time for travel is winter (December to March), when cold temperatures, strong winds, frequent snow, and short daylight hours make conditions harsh. Early spring is also challenging due to lingering snow, rain, and chilly weather. September can be stormy and wet due to typhoon remnants.
Average temperatures range from -4°C in winter to 16°C in summer. The coldest months are January and February, while August is the warmest, with daily highs around 18°C and lows near 14°C.
Yes, Yuzhno-Kurilsk receives 1,200–1,400 mm of precipitation annually, with the wettest months from August to October. Summer and early autumn are especially rainy, while winter is relatively dry but snowy.
Snow is common from December to March, with persistent snow cover and average depths of 12–19 cm in midwinter. Snowfall can linger into April, and blizzards are possible during winter storms.
Yuzhno-Kurilsk is often windy year-round, especially in late autumn and winter, when gale- or hurricane-force gusts can occur. Winds are generally milder in summer but can still be brisk on the coast.
Sunshine is limited, with the cloudiest months in summer. May and June are sunniest, with up to 15 hours of daylight. Annual sunshine hours are around 1,700–2,800, depending on the year.
Yes, fog is frequent in summer due to the cold Oyashio Current, resulting in high humidity and reduced visibility. Fog is less common in winter, when skies are often overcast but clearer.
Pack waterproof layers, warm clothing, and sturdy boots year-round. In summer, bring breathable rain gear and sun protection; in winter, insulated and windproof clothing is essential. Always be prepared for rapid weather changes.
The warmest month, with the highest average maximum temperature, is August (18.4 °C). The month with the lowest average maximum temperature is February (-2.4 °C). Overall, the average maximum temperature over the whole year is 7.6 °C.
The month with the highest average minimum temperature is August (15.8 °C). The coldest month, with the lowest average minimum temperature, is February (-5.5 °C). Overall, the average minimum temperature over the whole year is 5 °C.
The month with the highest average water temperature is September (17.1 °C). The month with the lowest average water temperature is February (-1.5 °C). Overall, the average water temperature over the whole year is 7.4 °C.
The wettest month, with the highest amount of precipitation, is October (102 mm). The driest month, with the least amount of precipitation, is February (38.9 mm). Over the whole year there are 790.6 mm of rainfall on average.
The month with the most days of rain is October (16.6 days). The month with the fewest days of rain is February (3.4 days). Over the whole year there are 136.9 days of rain on average.
The month with the most snowfall is March (126.1 mm). The months with the least snowfall are June, July, August, September and October (0 mm). Over the whole year there are 476 mm of snowfall on average.
The month with the most days of snowfall is January (17 days). The months with the fewest days of snowfall are August, September and October (0 days). Over the whole year there are 68.8 days of snowfall on average.
The month with the highest average relative humidity is July (92.9 %). The month with the lowest average relative humidity is December (70.1 %). The overall average relative humidity over the whole year is 80.9 %.
The windiest month, with the highest average wind speed, is December (29.7 km/h). The calmest month, with the lowest average wind speed, is July (14.9 km/h). The overall average wind speed over the whole year is 21.9 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is January (78 %). The month with the clearest skies, so the lowest cloud coverage, is September (45.2 %). Over the whole year there is an average cloud coverage of 58.9 %.
The month with the longest days, so the most daylight, is June (Average daylight: 15 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is April (Average sunshine: 7.9 h). The month with the least sunshine per day is January (Average sunshine: 2 h). Over the whole year there are 5.3 h of sunlight per day on average.
The month with the highest average UV index is August (UV index: 5). The months with the lowest average UV index are January, November and December (UV index: 1). Over the whole year the average UV index is 2.8.
