Mutsu, Japan experiences average highs of 13°C (55°F) and lows of 10°C (50°F) throughout the year. Rainfall is frequent, averaging about 15 rainy days per month. Average highs have warmed by 1.7°C (3.1°F) across the available records.
Mutsu, Japan Weather & Climate 2026
Monthly climate averages for Mutsu, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Mar–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.5/10
Best: June, July, August, September
UV Index
5
Low
Temperature 13°C / 10°C
Feels Like 10°C / 5°C
Rainy Days 15
Rainfall 124 mm
Sunshine 8 h
Humidity 76%
Wind Speed 36 km/h
Dew Point 7°C
Snow Days 13 days
Frost Days 11 days
Hottest Month
24°C
August
Avg Low22°C
Rain13days
Coldest Month
-1°C
February
Avg High2°C
Rain20days
Driest Month
10days
May
Avg High14°C
Avg Low11°C
Windiest Month
44 km/h
December (Gusts 67)
Sea Temperature
4°C – 26°C
Warmest water: August (
26.4°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:03
Daylight 15.1h
Sunset 19:11
Live conditions—
Mutsu on the map · live conditions
Mutsu, Japan
- Continent
- Asia
- Country
- Japan
- City
- Mutsu
- Population
- 56.2K
- Coordinates
- 41.29°, 141.22°
Seasonal Breakdown
Spring
Mar–May
Avg High 10°C
Avg Low 7°C
Rain 11 days/mo
Summer
Jun–Aug
Avg High 21°C
Avg Low 19°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 14°C
Rain 14 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 3°C
Avg Low 0°C
Rain 23 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: 2°C / -1°C . Feb: 2°C / -1°C . Mar: 6°C / 3°C . Apr: 10°C / 7°C . May: 14°C / 11°C . Jun: 18°C / 15°C . Jul: 22°C / 20°C . Aug: 24°C / 22°C . Sep: 22°C / 20°C . Oct: 17°C / 14°C . Nov: 11°C / 7°C . Dec: 5°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 147 mm. Feb: 116 mm. Mar: 86 mm. Apr: 90 mm. May: 85 mm. Jun: 103 mm. Jul: 120 mm. Aug: 195 mm. Sep: 120 mm. Oct: 135 mm. Nov: 105 mm. Dec: 184 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 70%. Feb: 70%. Mar: 71%. Apr: 75%. May: 82%. Jun: 88%. Jul: 91%. Aug: 87%. Sep: 76%. Oct: 68%. Nov: 67%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 43 km/h . Feb: 42 km/h . Mar: 38 km/h . Apr: 36 km/h . May: 32 km/h . Jun: 28 km/h . Jul: 26 km/h . Aug: 30 km/h . Sep: 32 km/h . Oct: 37 km/h . Nov: 40 km/h . Dec: 44 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 9h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 9h. Sep: 9h. Oct: 8h. Nov: 7h. Dec: 6h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 5°C . Feb: 4°C . Mar: 5°C . Apr: 9°C . May: 13°C . Jun: 18°C . Jul: 23°C . Aug: 26°C . Sep: 25°C . Oct: 20°C . Nov: 15°C . Dec: 9°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 3. 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: 24 days. Feb: 20 days. Mar: 8 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 3 days. Dec: 19 days.
Climate Trends
Average highs have warmed by 1.7°C (3.1°F) across the available records. Average rainfall is trending wetter by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 26°C | Aug · 24°C |
| Coldest month | Feb 2025 · 1°C | Feb · -1°C |
| Wettest month | Dec 2025 · 185 mm | Aug · 195 mm |
| Windiest month | Dec 2025 · 45 km/h | Dec · 44 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -1°C | -4°C / -9°C | 25days (147 mm) Wet | 6.8h Fair | 70% Muggy | 2.3 Moderate | Wet | View Details |
| February | 2°C / -1°C | -4°C / -9°C | 20days (116 mm) Wet | 7.8h Good | 70% Muggy | 3.4 Moderate | Wet | View Details |
| March | 6°C / 3°C | 1°C / -4°C | 12days (86 mm) Wet | 9h Good | 71% Muggy | 4.3 Moderate | Poor | View Details |
| April | 10°C / 7°C | 7°C / 1°C | 12days (90 mm) Wet | 9.6h Good | 75% Muggy | 5.4 High | Poor | View Details |
| May | 14°C / 11°C | 12°C / 7°C | 10days (85 mm) Wet | 10.1h Excellent | 82% Humid | 6.1 High | Fair | View Details |
| June best | 18°C / 15°C | 18°C / 13°C | 10days (103 mm) Wet | 10h Excellent | 88% Very Muggy | 6.7 High | Excellent | View Details |
| July best | 22°C / 20°C | 24°C / 20°C | 10days (120 mm) Wet | 9.5h Good | 91% Very Muggy | 6.6 High | Excellent | View Details |
| August best | 24°C / 22°C | 27°C / 22°C | 13days (195 mm) Wet | 8.7h Good | 87% Very Muggy | 5.9 High | Excellent | View Details |
| September best | 22°C / 20°C | 23°C / 18°C | 10days (120 mm) Wet | 8.6h Good | 76% Humid | 5.2 High | Excellent | View Details |
| October | 17°C / 14°C | 14°C / 9°C | 14days (135 mm) Wet | 7.8h Good | 68% Muggy | 3.8 Moderate | Fair | View Details |
| November | 11°C / 7°C | 6°C / 0°C | 18days (105 mm) Wet | 6.7h Fair | 67% Muggy | 2.7 Moderate | Wet | View Details |
| December | 5°C / 1°C | -2°C / -7°C | 25days (184 mm) Wet | 6.1h Fair | 70% Muggy | 1.9 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Mutsu are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Mutsu, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Mutsu is August, with average daytime highs of 24°C (76°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Mutsu is February, with average overnight lows of -1°C (31°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Mutsu is August, averaging 195mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Mutsu runs through January, December, February, November, with the heaviest rainfall in January. Based on 10-year averages for Mutsu.
Mutsu receives approximately 101 sunshine hours per year. The sunniest month is May with around 10 hours. Based on climate data for Mutsu.
The least favorable months to visit Mutsu are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Mutsu is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Mutsu is 76%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in July, August, September average 25°C (77°F), which is warm and comfortable for swimming and water activities.
Yes, Mutsu receives snow. Months with snowfall average 13 snow days and 39 cm (15 in) of accumulation, with about 11 frost days during winter.
Average wind speeds in Mutsu are 36 km/h (22 mph). The windiest month is December with peak winds reaching 44 km/h (28 mph) (gusts up to 67 km/h / 42 mph).
Mutsu averages 2 clear-sky days per month with overall cloud cover around 65%. The clearest skies occur in May.
The annual average dew point in Mutsu is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Mutsu 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 Mutsu ranges from 5°C (41°F) to 10°C (50°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 Mutsu. It earns a climate score of 7.9/10 with Excellent.
For June in Mutsu, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. With average highs of 18°C (64°F) and 10 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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