Uminokuchi, Japan experiences average highs of 15°C (59°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have stayed broadly stable across the available records.
Uminokuchi, Japan Weather & Climate 2026
Monthly climate averages for Uminokuchi, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.9/10
Best: June, July, August, September, October
UV Index
5
Low
Temperature 15°C / 7°C
Feels Like 14°C / 5°C
Rainy Days 14
Rainfall 141 mm
Sunshine 9 h
Humidity 75%
Wind Speed 10 km/h
Dew Point 6°C
Snow Days 7 days
Frost Days 19 days
Hottest Month
26°C
August
Avg Low19°C
Rain23days
Coldest Month
-5°C
January
Avg High2°C
Rain6days
Driest Month
6days
January
Avg High2°C
Avg Low-5°C
Windiest Month
14 km/h
January (Gusts 47)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 04:30
Daylight 14.6h
Sunset 19:05
Live conditions—
Uminokuchi on the map · live conditions
Uminokuchi, Japan
- Continent
- Asia
- Country
- Japan
- City
- Uminokuchi
- Population
- 3.2K
- Coordinates
- 36.00°, 138.50°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 4°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 17°C
Rain 22 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 9°C
Rain 14 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 4°C
Avg Low -4°C
Rain 6 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 / -5°C . Feb: 3°C / -5°C . Mar: 8°C / -1°C . Apr: 14°C / 4°C . May: 19°C / 9°C . Jun: 22°C / 14°C . Jul: 25°C / 18°C . Aug: 26°C / 19°C . Sep: 23°C / 16°C . Oct: 17°C / 9°C . Nov: 11°C / 3°C . Dec: 5°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 49 mm. Feb: 60 mm. Mar: 118 mm. Apr: 119 mm. May: 160 mm. Jun: 224 mm. Jul: 258 mm. Aug: 209 mm. Sep: 204 mm. Oct: 188 mm. Nov: 63 mm. Dec: 45 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 64%. Feb: 64%. Mar: 69%. Apr: 70%. May: 72%. Jun: 79%. Jul: 84%. Aug: 83%. Sep: 84%. Oct: 82%. Nov: 77%. Dec: 68%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 13 km/h . Mar: 12 km/h . Apr: 12 km/h . May: 9 km/h . Jun: 8 km/h . Jul: 7 km/h . Aug: 7 km/h . Sep: 8 km/h . Oct: 8 km/h . Nov: 10 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 8h. Feb: 9h. Mar: 9h. Apr: 9h. May: 9h. Jun: 9h. Jul: 9h. Aug: 10h. Sep: 8h. Oct: 7h. Nov: 8h. Dec: 8h.
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 4. 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: 11 days. Feb: 10 days. Mar: 11 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 8 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 24 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 27°C | Aug · 26°C |
| Coldest month | Feb 2025 · -7°C | Jan · -5°C |
| Wettest month | Sep 2025 · 212 mm | Jul · 258 mm |
| Windiest month | Feb 2025 · 15 km/h | Jan · 14 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May
Fair June best
Wet July best
Wet August best
Wet September best
Wet October best
Wet November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -5°C | -2°C / -10°C | 6days (49 mm) Good | 8.1h Good | 64% Muggy | 3.4 Moderate | Poor | View Details |
| February | 3°C / -5°C | -1°C / -9°C | 6days (60 mm) Good | 8.7h Good | 64% Muggy | 4.3 Moderate | Poor | View Details |
| March | 8°C / -1°C | 5°C / -4°C | 12days (118 mm) Wet | 8.7h Good | 69% Muggy | 5.3 High | Poor | View Details |
| April | 14°C / 4°C | 12°C / 2°C | 12days (119 mm) Wet | 9.4h Good | 70% Muggy | 5.9 High | Fair | View Details |
| May | 19°C / 9°C | 19°C / 8°C | 16days (160 mm) Wet | 9.3h Good | 72% Muggy | 6.2 High | Fair | View Details |
| June best | 22°C / 14°C | 23°C / 14°C | 20days (224 mm) Wet | 8.9h Good | 79% Humid | 6.7 High | Wet | View Details |
| July best | 25°C / 18°C | 29°C / 20°C | 24days (258 mm) Wet | 8.8h Good | 84% Humid | 7.5 Very High | Wet | View Details |
| August best | 26°C / 19°C | 30°C / 22°C | 23days (209 mm) Wet | 9.8h Good | 83% Humid | 7.3 Very High | Wet | View Details |
| September best | 23°C / 16°C | 25°C / 17°C | 20days (204 mm) Wet | 7.9h Good | 84% Humid | 6 High | Wet | View Details |
| October best | 17°C / 9°C | 16°C / 8°C | 14days (188 mm) Wet | 7.1h Good | 82% Humid | 4.3 Moderate | Wet | View Details |
| November | 11°C / 3°C | 8°C / 0°C | 7days (63 mm) Good | 7.7h Good | 77% Humid | 3.8 Moderate | Fair | View Details |
| December | 5°C / -2°C | 1°C / -6°C | 6days (45 mm) Good | 7.9h Good | 68% Muggy | 3.1 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Uminokuchi are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Uminokuchi, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Uminokuchi is August, with average daytime highs of 26°C (79°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Uminokuchi is January, with average overnight lows of -5°C (22°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Uminokuchi is July, averaging 258mm of precipitation across 24 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Uminokuchi runs through July, August, June, September, with the heaviest rainfall in July. Based on 10-year averages for Uminokuchi.
Uminokuchi receives approximately 102 sunshine hours per year. The sunniest month is August with around 10 hours. Based on climate data for Uminokuchi.
The least favorable months to visit Uminokuchi are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Uminokuchi is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Uminokuchi is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Uminokuchi receives snow. Months with snowfall average 7 snow days and 18 cm (7 in) of accumulation, with about 19 frost days during winter.
Average wind speeds in Uminokuchi are 10 km/h (6 mph). The windiest month is January with peak winds reaching 14 km/h (8 mph) (gusts up to 47 km/h / 29 mph).
Uminokuchi averages 3 clear-sky days per month with overall cloud cover around 61%. The clearest skies occur in November.
The annual average dew point in Uminokuchi is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Uminokuchi 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 Uminokuchi ranges from 5°C (41°F) to 14°C (57°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Uminokuchi, with a climate score of 6.9/10. Consider visiting during June, July, August, September, October instead for better conditions.
For June in Uminokuchi, pack Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. With average highs of 22°C (71°F) and 20 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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