Imabetsu, Japan experiences average highs of 14°C (57°F) and lows of 9°C (48°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Average highs have warmed by 1.5°C (2.7°F) across the available records.
Imabetsu, Japan Weather & Climate 2026
Monthly climate averages for Imabetsu, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.9/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 14°C / 9°C
Feels Like 12°C / 6°C
Rainy Days 14
Rainfall 104 mm
Sunshine 8 h
Humidity 76%
Wind Speed 20 km/h
Dew Point 7°C
Snow Days 13 days
Frost Days 17 days
Hottest Month
27°C
August
Avg Low22°C
Rain14days
Coldest Month
-3°C
January
Avg High1°C
Rain17days
Driest Month
11days
June
Avg High21°C
Avg Low15°C
Windiest Month
24 km/h
December (Gusts 53)
Sea Temperature
10°C – 27°C
Warmest water: August (
27.3°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:06
Daylight 15.1h
Sunset 19:13
Live conditions—
Imabetsu on the map · live conditions
Imabetsu, Japan
- Continent
- Asia
- Country
- Japan
- City
- Imabetsu
- Population
- 2.6K
- Coordinates
- 41.17°, 140.48°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 6°C
Rain 13 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 24°C
Avg Low 19°C
Rain 12 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 12°C
Rain 13 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 2°C
Avg Low -2°C
Rain 18 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 / -3°C . Feb: 1°C / -3°C . Mar: 6°C / 1°C . Apr: 12°C / 6°C . May: 18°C / 11°C . Jun: 21°C / 15°C . Jul: 25°C / 20°C . Aug: 27°C / 22°C . Sep: 23°C / 18°C . Oct: 16°C / 12°C . Nov: 10°C / 5°C . Dec: 3°C / -1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 77 mm. Feb: 71 mm. Mar: 81 mm. Apr: 84 mm. May: 87 mm. Jun: 98 mm. Jul: 120 mm. Aug: 195 mm. Sep: 121 mm. Oct: 116 mm. Nov: 94 mm. Dec: 106 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 73%. Feb: 72%. Mar: 73%. Apr: 73%. May: 77%. Jun: 82%. Jul: 86%. Aug: 84%. Sep: 78%. Oct: 73%. Nov: 72%. Dec: 73%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 24 km/h . Mar: 22 km/h . Apr: 23 km/h . May: 20 km/h . Jun: 17 km/h . Jul: 16 km/h . Aug: 17 km/h . Sep: 17 km/h . Oct: 19 km/h . Nov: 22 km/h . Dec: 24 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 9h. Apr: 9h. May: 10h. Jun: 10h. Jul: 9h. Aug: 9h. Sep: 9h. Oct: 8h. Nov: 6h. Dec: 6h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 12°C . Feb: 10°C . Mar: 10°C . Apr: 10°C . May: 13°C . Jun: 18°C . Jul: 24°C . Aug: 27°C . Sep: 26°C . Oct: 22°C . Nov: 18°C . Dec: 14°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: 9 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 5 days. Dec: 21 days.
Climate Trends
Average highs have warmed by 1.5°C (2.7°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 | Jul 2025 · 28°C | Aug · 27°C |
| Coldest month | Feb 2025 · -2°C | Jan · -3°C |
| Wettest month | Aug 2025 · 196 mm | Aug · 195 mm |
| Windiest month | Feb 2025 · 26 km/h | Dec · 24 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 1°C / -3°C | -4°C / -8°C | 17days (77 mm) Wet | 6.5h Fair | 73% Muggy | 2.1 Moderate | Poor | View Details |
| February | 1°C / -3°C | -3°C / -8°C | 16days (71 mm) Wet | 7.3h Good | 72% Muggy | 3.2 Moderate | Poor | View Details |
| March | 6°C / 1°C | 2°C / -3°C | 14days (81 mm) Wet | 8.5h Good | 73% Muggy | 4.3 Moderate | Poor | View Details |
| April | 12°C / 6°C | 9°C / 2°C | 13days (84 mm) Wet | 9.2h Good | 73% Muggy | 5.2 High | Fair | View Details |
| May best | 18°C / 11°C | 17°C / 9°C | 12days (87 mm) Wet | 9.7h Good | 77% Humid | 6.1 High | Good | View Details |
| June best | 21°C / 15°C | 22°C / 15°C | 11days (98 mm) Wet | 9.7h Good | 82% Humid | 6.5 High | Excellent | View Details |
| July best | 25°C / 20°C | 28°C / 22°C | 12days (120 mm) Wet | 9.2h Good | 86% Very Muggy | 6.6 High | Excellent | View Details |
| August best | 27°C / 22°C | 30°C / 24°C | 14days (195 mm) Wet | 8.8h Good | 84% Humid | 6.3 High | Excellent | View Details |
| September best | 23°C / 18°C | 24°C / 19°C | 11days (121 mm) Wet | 8.5h Good | 78% Humid | 5.3 High | Excellent | View Details |
| October | 16°C / 12°C | 15°C / 10°C | 12days (116 mm) Wet | 7.6h Good | 73% Muggy | 3.8 Moderate | Good | View Details |
| November | 10°C / 5°C | 6°C / 1°C | 16days (94 mm) Wet | 6.4h Fair | 72% Muggy | 2.5 Moderate | Poor | View Details |
| December | 3°C / -1°C | -1°C / -6°C | 21days (106 mm) Wet | 5.8h Fair | 73% Muggy | 1.7 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Imabetsu are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Imabetsu, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Imabetsu is August, with average daytime highs of 27°C (80°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Imabetsu is January, with average overnight lows of -3°C (27°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Imabetsu is August, averaging 195mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Imabetsu runs through December, January, February, November, with the heaviest rainfall in December. Based on 10-year averages for Imabetsu.
Imabetsu receives approximately 97 sunshine hours per year. The sunniest month is May with around 10 hours. Based on climate data for Imabetsu.
The least favorable months to visit Imabetsu are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Imabetsu is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Imabetsu 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 26°C (79°F), which is warm and comfortable for swimming and water activities.
Yes, Imabetsu receives snow. Months with snowfall average 13 snow days and 24 cm (9 in) of accumulation, with about 17 frost days during winter.
Average wind speeds in Imabetsu are 20 km/h (12 mph). The windiest month is December with peak winds reaching 24 km/h (15 mph) (gusts up to 53 km/h / 33 mph).
Imabetsu averages 1 clear-sky days per month with overall cloud cover around 67%. The clearest skies occur in May.
The annual average dew point in Imabetsu is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Imabetsu 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 Imabetsu ranges from 6°C (43°F) to 12°C (54°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 Imabetsu. It earns a climate score of 8.3/10 with Excellent.
For June in Imabetsu, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 21°C (71°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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