Yasu, Japan experiences average highs of 19°C (66°F) and lows of 12°C (54°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Average highs have stayed broadly stable across the available records.
Yasu, Japan Weather & Climate 2026
Monthly climate averages for Yasu, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jun–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.5/10
Best: May, June, September, October, November
UV Index
5
Low
Temperature 19°C / 12°C
Feels Like 19°C / 11°C
Rainy Days 11
Rainfall 121 mm
Sunshine 8 h
Humidity 79%
Wind Speed 15 km/h
Dew Point 12°C
Snow Days 4 days
Frost Days 7 days
Hottest Month
31°C
August
Avg Low24°C
Rain12days
Coldest Month
1°C
January
Avg High8°C
Rain8days
Driest Month
6days
November
Avg High16°C
Avg Low8°C
Windiest Month
17 km/h
March (Gusts 43)
Worst Time to Visit
Consider avoiding January, February, August due to less favorable weather conditions.
Sun Position
Sunrise 04:43
Daylight 14.5h
Sunset 19:13
Live conditions—
Yasu on the map · live conditions
Yasu, Japan
- Continent
- Asia
- Country
- Japan
- City
- Yasu
- Population
- 50.7K
- Coordinates
- 35.10°, 136.02°
Seasonal Breakdown
Spring
Mar–May
Avg High 18°C
Avg Low 9°C
Rain 11 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 29°C
Avg Low 22°C
Rain 14 days/mo
1/3 best months
Autumn
Sep–Nov
Avg High 21°C
Avg Low 15°C
Rain 10 days/mo
3/3 best months
Winter
Dec–Feb
Avg High 9°C
Avg Low 2°C
Rain 8 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: 8°C / 1°C . Feb: 9°C / 1°C . Mar: 13°C / 5°C . Apr: 18°C / 9°C . May: 23°C / 14°C . Jun: 26°C / 18°C . Jul: 30°C / 23°C . Aug: 31°C / 24°C . Sep: 28°C / 21°C . Oct: 21°C / 14°C . Nov: 16°C / 8°C . Dec: 10°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 53 mm. Feb: 61 mm. Mar: 104 mm. Apr: 138 mm. May: 151 mm. Jun: 197 mm. Jul: 191 mm. Aug: 151 mm. Sep: 136 mm. Oct: 161 mm. Nov: 57 mm. Dec: 49 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 77%. Feb: 75%. Mar: 75%. Apr: 75%. May: 76%. Jun: 81%. Jul: 83%. Aug: 81%. Sep: 82%. Oct: 81%. Nov: 79%. Dec: 79%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 17 km/h . Mar: 17 km/h . Apr: 17 km/h . May: 15 km/h . Jun: 14 km/h . Jul: 13 km/h . Aug: 14 km/h . Sep: 14 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 16 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 8h. Apr: 9h. May: 9h. Jun: 9h. Jul: 9h. Aug: 10h. Sep: 8h. Oct: 8h. Nov: 8h. Dec: 7h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 6 days. Feb: 5 days. Mar: 1 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 3 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 20 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 33°C | Aug · 31°C |
| Coldest month | Feb 2025 · 0°C | Jan · 1°C |
| Wettest month | Jun 2025 · 194 mm | Jun · 197 mm |
| Windiest month | Mar 2025 · 19 km/h | Mar · 17 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April
Good May best
Excellent June best
Excellent July
Wet August
Poor September best
Good October best
Excellent November best
Good December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 8°C / 1°C | 4°C / -3°C | 8days (53 mm) Wet | 7.3h Good | 77% Humid | 3.2 Moderate | Poor | View Details |
| February | 9°C / 1°C | 5°C / -2°C | 9days (61 mm) Wet | 7.7h Good | 75% Muggy | 4.1 Moderate | Poor | View Details |
| March | 13°C / 5°C | 10°C / 2°C | 11days (104 mm) Wet | 8.1h Good | 75% Muggy | 4.7 Moderate | Fair | View Details |
| April | 18°C / 9°C | 17°C / 7°C | 11days (138 mm) Wet | 8.8h Good | 75% Muggy | 5.8 High | Good | View Details |
| May best | 23°C / 14°C | 23°C / 14°C | 11days (151 mm) Wet | 8.9h Good | 76% Humid | 6 High | Excellent | View Details |
| June best | 26°C / 18°C | 28°C / 20°C | 14days (197 mm) Wet | 8.6h Good | 81% Humid | 6.5 High | Excellent | View Details |
| July | 30°C / 23°C | 35°C / 27°C | 15days (191 mm) Wet | 9.1h Good | 83% Humid | 7.5 Very High | Wet | View Details |
| August | 31°C / 24°C | 36°C / 29°C | 12days (151 mm) Wet | 10.1h Excellent | 81% Humid | 7.2 Very High | Poor | View Details |
| September best | 28°C / 21°C | 31°C / 24°C | 13days (136 mm) Wet | 8.3h Good | 82% Humid | 6.2 High | Good | View Details |
| October best | 21°C / 14°C | 21°C / 14°C | 10days (161 mm) Wet | 7.5h Good | 81% Humid | 4.5 Moderate | Excellent | View Details |
| November best | 16°C / 8°C | 14°C / 6°C | 6days (57 mm) Good | 7.6h Good | 79% Humid | 3.5 Moderate | Good | View Details |
| December | 10°C / 3°C | 7°C / 0°C | 8days (49 mm) Wet | 7.2h Good | 79% Humid | 3 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Yasu are May, June, September, October, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Yasu, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Yasu is August, with average daytime highs of 31°C (88°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Yasu is January, with average overnight lows of 1°C (33°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Yasu is June, averaging 197mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Yasu runs through July, June, September, August, with the heaviest rainfall in July. Based on 10-year averages for Yasu.
Yasu receives approximately 99 sunshine hours per year. The sunniest month is August with around 10 hours. Based on climate data for Yasu.
The least favorable months to visit Yasu are January, February, August, primarily due to less favorable weather conditions. For the best conditions, consider May, June, September, October, November instead.
The annual average UV index in Yasu is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Yasu is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Yasu receives snow. Months with snowfall average 4 snow days and 3 cm (1 in) of accumulation, with about 7 frost days during winter.
Average wind speeds in Yasu are 15 km/h (9 mph). The windiest month is March with peak winds reaching 17 km/h (11 mph) (gusts up to 43 km/h / 27 mph).
Yasu averages 2 clear-sky days per month with overall cloud cover around 62%. The clearest skies occur in November.
The annual average dew point in Yasu is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Yasu has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Yasu ranges from 11°C (52°F) to 19°C (66°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Yasu. It earns a climate score of 7.9/10 with Excellent.
For June in Yasu, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 26°C (79°F) and 14 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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