Kushiro, Japan experiences average highs of 10°C (50°F) and lows of 5°C (41°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have warmed by 1.5°C (2.7°F) across the available records.
Kushiro, Japan Weather & Climate 2026
Monthly climate averages for Kushiro, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.7/10
Best: July, August, September
UV Index
4
Low
Temperature 10°C / 5°C
Feels Like 8°C / 2°C
Rainy Days 10
Rainfall 96 mm
Sunshine 8 h
Humidity 78%
Wind Speed 22 km/h
Dew Point 4°C
Snow Days 7 days
Frost Days 21 days
Hottest Month
22°C
August
Avg Low18°C
Rain15days
Coldest Month
-8°C
February
Avg High-1°C
Rain5days
Driest Month
5days
February
Avg High-1°C
Avg Low-8°C
Windiest Month
26 km/h
December (Gusts 44)
Sea Temperature
1°C – 19°C
Warmest water: August (
19.4°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 03:44
Daylight 15.3h
Sunset 19:04
Live conditions—
Kushiro on the map · live conditions
Kushiro, Japan
- Continent
- Asia
- Country
- Japan
- City
- Kushiro
- Population
- 167.9K
- Coordinates
- 42.98°, 144.37°
Seasonal Breakdown
Spring
Mar–May
Avg High 8°C
Avg Low 2°C
Rain 10 days/mo
Summer
Jun–Aug
Avg High 19°C
Avg Low 15°C
Rain 12 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 14°C
Avg Low 9°C
Rain 10 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 0°C
Avg Low -7°C
Rain 7 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -1°C / -7°C . Feb: -1°C / -8°C . Mar: 3°C / -3°C . Apr: 8°C / 2°C . May: 13°C / 7°C . Jun: 16°C / 11°C . Jul: 20°C / 16°C . Aug: 22°C / 18°C . Sep: 20°C / 15°C . Oct: 15°C / 9°C . Nov: 9°C / 3°C . Dec: 2°C / -4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 44 mm. Feb: 38 mm. Mar: 80 mm. Apr: 94 mm. May: 90 mm. Jun: 107 mm. Jul: 102 mm. Aug: 199 mm. Sep: 126 mm. Oct: 132 mm. Nov: 77 mm. Dec: 64 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 72%. Mar: 75%. Apr: 76%. May: 82%. Jun: 88%. Jul: 91%. Aug: 89%. Sep: 83%. Oct: 74%. Nov: 68%. Dec: 65%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 24 km/h . Feb: 24 km/h . Mar: 24 km/h . Apr: 24 km/h . May: 21 km/h . Jun: 19 km/h . Jul: 16 km/h . Aug: 20 km/h . Sep: 20 km/h . Oct: 23 km/h . Nov: 26 km/h . Dec: 26 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 9h. Apr: 9h. May: 10h. Jun: 9h. Jul: 8h. Aug: 7h. Sep: 8h. Oct: 8h. Nov: 7h. Dec: 7h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 2°C . Feb: 1°C . Mar: 1°C . Apr: 3°C . May: 6°C . Jun: 10°C . Jul: 15°C . Aug: 19°C . Sep: 19°C . Oct: 16°C . Nov: 12°C . Dec: 7°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 4. Mar: UV 5. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 6. Aug: UV 5. Sep: UV 5. Oct: UV 4. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 11 days. Feb: 10 days. Mar: 9 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 2 days. Dec: 8 days.
Climate Trends
Average highs have warmed by 1.5°C (2.7°F) across the available records. Average rainfall is trending drier by about 33 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 24°C | Aug · 22°C |
| Coldest month | Feb 2025 · -7°C | Feb · -8°C |
| Wettest month | Sep 2025 · 170 mm | Aug · 199 mm |
| Windiest month | Dec 2025 · 30 km/h | Dec · 26 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Fair June
Good July best
Excellent August best
Wet September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -7°C | -7°C / -13°C | 7days (44 mm) Good | 7.2h Good | 68% Muggy | 2.4 Moderate | Poor | View Details |
| February | -1°C / -8°C | -7°C / -14°C | 5days (38 mm) Good | 8.3h Good | 72% Muggy | 3.6 Moderate | Poor | View Details |
| March | 3°C / -3°C | -1°C / -8°C | 8days (80 mm) Wet | 9.1h Good | 75% Muggy | 4.7 Moderate | Poor | View Details |
| April | 8°C / 2°C | 5°C / -2°C | 10days (94 mm) Wet | 9.2h Good | 76% Humid | 4.7 Moderate | Poor | View Details |
| May | 13°C / 7°C | 11°C / 4°C | 11days (90 mm) Wet | 9.5h Good | 82% Humid | 5.8 High | Fair | View Details |
| June | 16°C / 11°C | 15°C / 10°C | 11days (107 mm) Wet | 8.5h Good | 88% Very Muggy | 6.2 High | Good | View Details |
| July best | 20°C / 16°C | 21°C / 16°C | 10days (102 mm) Wet | 7.9h Good | 91% Very Muggy | 6.3 High | Excellent | View Details |
| August best | 22°C / 18°C | 23°C / 18°C | 15days (199 mm) Wet | 6.8h Fair | 89% Very Muggy | 5.1 High | Wet | View Details |
| September best | 20°C / 15°C | 20°C / 14°C | 10days (126 mm) Wet | 7.8h Good | 83% Humid | 4.9 Moderate | Excellent | View Details |
| October | 15°C / 9°C | 12°C / 6°C | 10days (132 mm) Wet | 7.5h Good | 74% Muggy | 3.5 Moderate | Fair | View Details |
| November | 9°C / 3°C | 4°C / -2°C | 10days (77 mm) Wet | 7h Good | 68% Muggy | 2.4 Moderate | Poor | View Details |
| December | 2°C / -4°C | -4°C / -10°C | 8days (64 mm) Wet | 6.6h Fair | 65% Muggy | 2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Kushiro are July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Kushiro, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Kushiro is August, with average daytime highs of 22°C (71°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Kushiro is February, with average overnight lows of -8°C (17°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Kushiro is August, averaging 199mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Kushiro runs through August, May, June, April, with the heaviest rainfall in August. Based on 10-year averages for Kushiro.
Kushiro receives approximately 95 sunshine hours per year. The sunniest month is May with around 10 hours. Based on climate data for Kushiro.
The least favorable months to visit Kushiro are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider July, August, September instead.
The annual average UV index in Kushiro is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Kushiro is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 9°C (48°F), which most swimmers will find too cold without a wetsuit.
Yes, Kushiro receives snow. Months with snowfall average 7 snow days and 18 cm (7 in) of accumulation, with about 21 frost days during winter.
Average wind speeds in Kushiro are 22 km/h (14 mph). The windiest month is December with peak winds reaching 26 km/h (16 mph) (gusts up to 44 km/h / 27 mph).
Kushiro averages 4 clear-sky days per month with overall cloud cover around 59%. The clearest skies occur in December.
The annual average dew point in Kushiro is 4°C (39°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Kushiro has a Warm-Summer Continental climate, classified as Dfb under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Kushiro ranges from 2°C (36°F) to 8°C (46°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Kushiro. It earns a climate score of 6.7/10 with Good.
For June in Kushiro, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. With average highs of 16°C (60°F) and 11 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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