Udono, Japan experiences average highs of 20°C (68°F) and lows of 15°C (59°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Average highs have stayed broadly stable across the available records.
Udono, Japan Weather & Climate 2026
Monthly climate averages for Udono, 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
5.9/10
Best: April, May, June, October, November
UV Index
5
Low
Temperature 20°C / 15°C
Feels Like 20°C / 14°C
Rainy Days 12
Rainfall 209 mm
Sunshine 8 h
Humidity 76%
Wind Speed 18 km/h
Dew Point 13°C
Frost Days 1 days
Hottest Month
30°C
August
Avg Low25°C
Rain18days
Coldest Month
5°C
January
Avg High10°C
Rain7days
Driest Month
6days
December
Avg High12°C
Avg Low7°C
Windiest Month
20 km/h
February (Gusts 42)
Sea Temperature
17°C – 27°C
Warmest water: September (
27.3°C
)
Worst Time to Visit
Consider avoiding August due to heavy rainfall, oppressive humidity.
Sun Position
Sunrise 04:46
Daylight 14.4h
Sunset 19:09
Live conditions—
Udono on the map · live conditions
Udono, Japan
- Continent
- Asia
- Country
- Japan
- City
- Udono
- Population
- 10.3K
- Coordinates
- 33.74°, 136.01°
Seasonal Breakdown
Spring
Mar–May
Avg High 18°C
Avg Low 12°C
Rain 11 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 28°C
Avg Low 23°C
Rain 17 days/mo
1/3 best months
Autumn
Sep–Nov
Avg High 22°C
Avg Low 18°C
Rain 15 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 11°C
Avg Low 6°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: 10°C / 5°C . Feb: 11°C / 5°C . Mar: 15°C / 8°C . Apr: 19°C / 12°C . May: 22°C / 16°C . Jun: 25°C / 20°C . Jul: 28°C / 24°C . Aug: 30°C / 25°C . Sep: 27°C / 23°C . Oct: 22°C / 18°C . Nov: 18°C / 12°C . Dec: 12°C / 7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 88 mm. Feb: 98 mm. Mar: 183 mm. Apr: 198 mm. May: 250 mm. Jun: 326 mm. Jul: 248 mm. Aug: 267 mm. Sep: 307 mm. Oct: 344 mm. Nov: 129 mm. Dec: 73 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 67%. Feb: 67%. Mar: 71%. Apr: 74%. May: 79%. Jun: 84%. Jul: 86%. Aug: 84%. Sep: 83%. Oct: 77%. Nov: 72%. Dec: 69%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 20 km/h . Feb: 20 km/h . Mar: 19 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 19 km/h . Jul: 17 km/h . Aug: 18 km/h . Sep: 19 km/h . Oct: 19 km/h . Nov: 16 km/h . Dec: 19 km/h .
Sunshine
Sunshine
Sunshine: Jan: 8h. Feb: 8h. Mar: 8h. Apr: 9h. May: 9h. Jun: 8h. Jul: 9h. Aug: 10h. Sep: 8h. Oct: 7h. Nov: 8h. Dec: 8h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 19°C . Feb: 17°C . Mar: 17°C . Apr: 18°C . May: 20°C . Jun: 23°C . Jul: 26°C . Aug: 27°C . Sep: 27°C . Oct: 25°C . Nov: 23°C . Dec: 20°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 6. Jun: UV 6. 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
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 46 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 30°C | Aug · 30°C |
| Coldest month | Feb 2025 · 3°C | Jan · 5°C |
| Wettest month | May 2025 · 405 mm | Oct · 344 mm |
| Windiest month | Mar 2025 · 23 km/h | Feb · 20 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Wet April best
Wet May best
Excellent June best
Excellent July
Wet August
Wet September
Wet October best
Excellent November best
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 10°C / 5°C | 6°C / 1°C | 7days (88 mm) Good | 7.9h Good | 67% Muggy | 3.6 Moderate | Poor | View Details |
| February | 11°C / 5°C | 8°C / 1°C | 7days (98 mm) Good | 8.2h Good | 67% Muggy | 4.2 Moderate | Poor | View Details |
| March | 15°C / 8°C | 13°C / 6°C | 11days (183 mm) Wet | 8.3h Good | 71% Muggy | 5.2 High | Wet | View Details |
| April best | 19°C / 12°C | 18°C / 11°C | 11days (198 mm) Wet | 8.7h Good | 74% Muggy | 5.5 High | Wet | View Details |
| May best | 22°C / 16°C | 23°C / 16°C | 12days (250 mm) Wet | 8.6h Good | 79% Humid | 5.7 High | Excellent | View Details |
| June best | 25°C / 20°C | 28°C / 22°C | 16days (326 mm) Wet | 8.1h Good | 84% Humid | 6.4 High | Excellent | View Details |
| July | 28°C / 24°C | 33°C / 28°C | 17days (248 mm) Wet | 9.4h Good | 86% Very Muggy | 7.7 Very High | Wet | View Details |
| August | 30°C / 25°C | 35°C / 30°C | 18days (267 mm) Wet | 10.1h Excellent | 84% Humid | 7.3 Very High | Wet | View Details |
| September | 27°C / 23°C | 31°C / 26°C | 20days (307 mm) Wet | 8.4h Good | 83% Humid | 6.3 High | Wet | View Details |
| October best | 22°C / 18°C | 23°C / 18°C | 16days (344 mm) Wet | 7.2h Good | 77% Humid | 4.4 Moderate | Excellent | View Details |
| November best | 18°C / 12°C | 17°C / 11°C | 8days (129 mm) Wet | 7.7h Good | 72% Muggy | 3.7 Moderate | Good | View Details |
| December | 12°C / 7°C | 9°C / 4°C | 6days (73 mm) Good | 7.8h Good | 69% Muggy | 3.3 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Udono are April, May, June, October, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Udono, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Udono is August, with average daytime highs of 30°C (85°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Udono is January, with average overnight lows of 5°C (41°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Udono is October, averaging 344mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Udono runs through September, August, July, June, with the heaviest rainfall in September. Based on 10-year averages for Udono.
Udono receives approximately 100 sunshine hours per year. The sunniest month is August with around 10 hours. Based on climate data for Udono.
The least favorable months to visit Udono are August, primarily due to heavy rainfall, oppressive humidity. For the best conditions, consider April, May, June, October, November instead.
The annual average UV index in Udono is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Udono is 76%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September, October, November average 25°C (77°F), which is warm and comfortable for swimming and water activities.
Udono rarely sees significant snowfall but does experience frost, averaging 1 frost days during the colder months.
Average wind speeds in Udono are 18 km/h (11 mph). The windiest month is February with peak winds reaching 20 km/h (12 mph) (gusts up to 42 km/h / 26 mph).
Udono averages 6 clear-sky days per month with overall cloud cover around 56%. The clearest skies occur in December.
The annual average dew point in Udono is 13°C (55°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Udono 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 Udono ranges from 14°C (57°F) to 20°C (68°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 Udono. It earns a climate score of 7.6/10 with Excellent.
For June in Udono, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 25°C (77°F) and 16 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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