Imagane, Japan experiences average highs of 12°C (54°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 15 rainy days per month. Average highs have warmed by 1.6°C (2.9°F) across the available records.
Imagane, Japan Weather & Climate 2026
Monthly climate averages for Imagane, 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
4.6/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 12°C / 7°C
Feels Like 11°C / 5°C
Rainy Days 15
Rainfall 115 mm
Sunshine 8 h
Humidity 80%
Wind Speed 16 km/h
Dew Point 7°C
Snow Days 16 days
Frost Days 17 days
Hottest Month
25°C
August
Avg Low 20°C
Rain 16 days
Coldest Month
-4°C
January
Avg High 0°C
Rain 18 days
Driest Month
12 days
April
Avg High 11°C
Avg Low 4°C
Windiest Month
20 km/h
December (Gusts 60)
Sea Temperature
6°C – 24°C
Warmest water: August (
24.2°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:16
Daylight 15h
Sunset 19:16
Live conditions —
Imagane on the map · live conditions
Imagane, Japan
- Continent
- Asia
- Country
- Japan
- City
- Imagane
- Population
- 5.1K
- Coordinates
- 42.42°, 140.01°
Seasonal Breakdown
Spring
Mar–May
Avg High 11°C
Avg Low 4°C
Rain 13 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 23°C
Avg Low 18°C
Rain 14 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 11°C
Rain 15 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 0°C
Avg Low -4°C
Rain 18 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 0°C / -4°C . Feb: 0°C / -4°C . Mar: 5°C / 0°C . Apr: 11°C / 4°C . May: 16°C / 9°C . Jun: 20°C / 14°C . Jul: 24°C / 19°C . Aug: 25°C / 20°C . Sep: 22°C / 17°C . Oct: 16°C / 11°C . Nov: 9°C / 4°C . Dec: 1°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 80 mm. Feb: 74 mm. Mar: 88 mm. Apr: 86 mm. May: 95 mm. Jun: 128 mm. Jul: 133 mm. Aug: 205 mm. Sep: 149 mm. Oct: 126 mm. Nov: 118 mm. Dec: 100 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 75%. Mar: 77%. Apr: 77%. May: 81%. Jun: 86%. Jul: 89%. Aug: 88%. Sep: 83%. Oct: 76%. Nov: 75%. Dec: 76%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 20 km/h . Mar: 18 km/h . Apr: 17 km/h . May: 15 km/h . Jun: 13 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 17 km/h . Nov: 19 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 8h. Mar: 9h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 9h. Sep: 9h. Oct: 8h. Nov: 7h. Dec: 5h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 8°C . Feb: 6°C . Mar: 7°C . Apr: 8°C . May: 12°C . Jun: 16°C . Jul: 22°C . Aug: 24°C . Sep: 24°C . Oct: 17°C . Nov: 11°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 6. Jul: UV 6. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow Days Snowfall
Snow Days: Jan: 26 days. Feb: 24 days. Mar: 17 days. Apr: 5 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 12 days. Dec: 27 days.
Climate Trends
Average highs have warmed by 1.6°C (2.9°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 · 27°C | Aug · 25°C |
| Coldest month | Jan 2025 · -3°C | Jan · -4°C |
| Wettest month | Sep 2025 · 247 mm | Aug · 205 mm |
| Windiest month | Feb 2025 · 21 km/h | Dec · 20 km/h |
Month-by-Month Weather Table
January
Wet 
February
Poor March
Poor April
Poor May best
Good 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 | 0°C / -4°C | -5°C / -9°C | 18days (80 mm) Wet | 6.2h Fair | 76% Humid | 2 Low | Wet | View Details |
| February | 0°C / -4°C | -4°C / -9°C | 16days (74 mm) Wet | 7.5h Good | 75% Muggy | 3.2 Moderate | Poor | View Details |
| March | 5°C / 0°C | 1°C / -4°C | 14days (88 mm) Wet | 9h Good | 77% Humid | 4.4 Moderate | Poor | View Details |
| April | 11°C / 4°C | 8°C / 1°C | 12days (86 mm) Wet | 9.6h Good | 77% Humid | 5 Moderate | Poor | View Details |
| May best | 16°C / 9°C | 16°C / 7°C | 12days (95 mm) Wet | 10.2h Excellent | 81% Humid | 6 High | Good | View Details |
| June best | 20°C / 14°C | 21°C / 14°C | 13days (128 mm) Wet | 10.1h Excellent | 86% Very Muggy | 6.1 High | Excellent | View Details |
| July best | 24°C / 19°C | 28°C / 21°C | 13days (133 mm) Wet | 9.7h Good | 89% Very Muggy | 6 High | Excellent | View Details |
| August best | 25°C / 20°C | 29°C / 23°C | 16days (205 mm) Wet | 8.9h Good | 88% Very Muggy | 5.6 High | Excellent | View Details |
| September best | 22°C / 17°C | 24°C / 18°C | 12days (149 mm) Wet | 8.8h Good | 83% Humid | 4.9 Moderate | Excellent | View Details |
| October | 16°C / 11°C | 14°C / 9°C | 15days (126 mm) Wet | 7.9h Good | 76% Humid | 3.5 Moderate | Fair | View Details |
| November | 9°C / 4°C | 5°C / 0°C | 18days (118 mm) Wet | 6.5h Fair | 75% Muggy | 2.3 Moderate | Wet | View Details |
| December | 1°C / -3°C | -3°C / -8°C | 21days (100 mm) Wet | 5.4h Fair | 76% Humid | 1.8 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Imagane 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 Imagane, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Imagane is August, with average daytime highs of 25°C (78°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Imagane is January, with average overnight lows of -4°C (24°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Imagane is August, averaging 205mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Imagane runs through December, January, November, February, with the heaviest rainfall in December. Based on 10-year averages for Imagane.
Imagane receives approximately 100 sunshine hours per year. The sunniest month is May with around 10 hours. Based on climate data for Imagane.
The least favorable months to visit Imagane are January, February, November, 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 Imagane is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Imagane is 80%, 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 23°C (73°F), which is warm and comfortable for swimming and water activities.
Yes, Imagane receives snow. Months with snowfall average 16 snow days and 34 cm (13 in) of accumulation, with about 17 frost days during winter.
Average wind speeds in Imagane are 16 km/h (10 mph). The windiest month is December with peak winds reaching 20 km/h (12 mph) (gusts up to 60 km/h / 37 mph).
Imagane averages 2 clear-sky days per month with overall cloud cover around 69%. The clearest skies occur in May.
The annual average dew point in Imagane is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Imagane 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 Imagane ranges from 5°C (41°F) to 11°C (52°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, July is a great time to visit Imagane. It earns a climate score of 8.6/10 with Excellent.
For July in Imagane, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 24°C (76°F) and 13 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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