Sagara, Japan experiences average highs of 20°C (68°F) and lows of 16°C (61°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Average highs have stayed broadly stable across the available records.
Sagara, Japan Weather & Climate 2026
Monthly climate averages for Sagara, 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
6/10
Best: May, June, September, October, November
UV Index
5
Low
Temperature 20°C / 16°C
Feels Like 20°C / 15°C
Rainy Days 12
Rainfall 186 mm
Sunshine 8 h
Humidity 75%
Wind Speed 19 km/h
Dew Point 13°C
Snow Days 1 days
Hottest Month
29°C
August
Avg Low 26°C
Rain 18 days
Coldest Month
6°C
January
Avg High 11°C
Rain 6 days
Driest Month
6 days
January
Avg High 11°C
Avg Low 6°C
Windiest Month
23 km/h
January (Gusts 49)
Sea Temperature
16°C – 28°C
Warmest water: August (
27.6°C
)
Worst Time to Visit
Consider avoiding February, August due to frequent rain.
Sun Position
Sunrise 04:34
Daylight 14.5h
Sunset 19:02
Live conditions —
Sagara on the map · live conditions
Sagara, Japan
- Continent
- Asia
- Country
- Japan
- City
- Sagara
- Population
- 25.9K
- Coordinates
- 34.69°, 138.20°
Seasonal Breakdown
Spring
Mar–May
Avg High 18°C
Avg Low 13°C
Rain 12 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 27°C
Avg Low 24°C
Rain 17 days/mo
1/3 best months
Autumn
Sep–Nov
Avg High 23°C
Avg Low 19°C
Rain 14 days/mo
3/3 best months
Winter
Dec–Feb
Avg High 12°C
Avg Low 7°C
Rain 6 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: 11°C / 6°C . Feb: 12°C / 6°C . Mar: 15°C / 9°C . Apr: 18°C / 13°C . May: 21°C / 17°C . Jun: 24°C / 21°C . Jul: 28°C / 25°C . Aug: 29°C / 26°C . Sep: 27°C / 24°C . Oct: 22°C / 19°C . Nov: 18°C / 14°C . Dec: 13°C / 8°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 62 mm. Feb: 95 mm. Mar: 170 mm. Apr: 181 mm. May: 228 mm. Jun: 333 mm. Jul: 305 mm. Aug: 212 mm. Sep: 237 mm. Oct: 231 mm. Nov: 118 mm. Dec: 65 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 63%. Feb: 63%. Mar: 70%. Apr: 74%. May: 79%. Jun: 84%. Jul: 86%. Aug: 83%. Sep: 81%. Oct: 74%. Nov: 71%. Dec: 66%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 23 km/h . Mar: 21 km/h . Apr: 21 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 17 km/h . Aug: 17 km/h . Sep: 17 km/h . Oct: 17 km/h . Nov: 18 km/h . Dec: 23 km/h .
Sunshine
Sunshine
Sunshine: Jan: 8h. Feb: 8h. Mar: 8h. Apr: 9h. May: 9h. Jun: 9h. Jul: 9h. Aug: 10h. Sep: 8h. Oct: 7h. Nov: 7h. Dec: 8h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 17°C . Feb: 16°C . Mar: 16°C . Apr: 17°C . May: 19°C . Jun: 22°C . Jul: 25°C . Aug: 28°C . Sep: 27°C . Oct: 24°C . Nov: 21°C . Dec: 18°C .
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 6. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Snow Days
Snow Days Snowfall
Snow Days: Jan: 0 days. Feb: 1 days. Mar: 1 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 0 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 52 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 30°C | Aug · 29°C |
| Coldest month | Feb 2025 · 5°C | Jan · 6°C |
| Wettest month | May 2025 · 310 mm | Jun · 333 mm |
| Windiest month | Feb 2025 · 26 km/h | Jan · 23 km/h |
Month-by-Month Weather Table
January
Fair 
February
Poor 
March
Fair April
Wet May best
Excellent June best
Excellent July
Wet August
Wet September best
Wet October best
Excellent November best
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 11°C / 6°C | 6°C / 2°C | 6days (62 mm) Good | 7.8h Good | 63% Muggy | 3.2 Moderate | Fair | View Details |
| February | 12°C / 6°C | 8°C / 2°C | 7days (95 mm) Good | 8.2h Good | 63% Muggy | 4 Moderate | Poor | View Details |
| March | 15°C / 9°C | 13°C / 6°C | 12days (170 mm) Wet | 8.3h Good | 70% Muggy | 4.6 Moderate | Fair | View Details |
| April | 18°C / 13°C | 17°C / 11°C | 11days (181 mm) Wet | 8.9h Good | 74% Muggy | 5.6 High | Wet | View Details |
| May best | 21°C / 17°C | 22°C / 17°C | 13days (228 mm) Wet | 9h Good | 79% Humid | 5.8 High | Excellent | View Details |
| June best | 24°C / 21°C | 27°C / 23°C | 16days (333 mm) Wet | 8.7h Good | 84% Humid | 6.4 High | Excellent | View Details |
| July | 28°C / 25°C | 33°C / 29°C | 17days (305 mm) Wet | 9.4h Good | 86% Very Muggy | 7.6 Very High | Wet | View Details |
| August | 29°C / 26°C | 35°C / 31°C | 18days (212 mm) Wet | 10.2h Excellent | 83% Humid | 7.2 Very High | Wet | View Details |
| September best | 27°C / 24°C | 31°C / 27°C | 18days (237 mm) Wet | 8.4h Good | 81% Humid | 6.2 High | Wet | View Details |
| October best | 22°C / 19°C | 24°C / 19°C | 15days (231 mm) Wet | 7.2h Good | 74% Muggy | 4.4 Moderate | Excellent | View Details |
| November best | 18°C / 14°C | 17°C / 12°C | 10days (118 mm) Wet | 7.4h Good | 71% Muggy | 3.5 Moderate | Good | View Details |
| December | 13°C / 8°C | 9°C / 5°C | 6days (65 mm) Good | 7.8h Good | 66% Muggy | 3.1 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Sagara are May, June, September, October, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Sagara, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Sagara is August, with average daytime highs of 29°C (85°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Sagara is January, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Sagara is June, averaging 333mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Sagara runs through August, September, July, June, with the heaviest rainfall in August. Based on 10-year averages for Sagara.
Sagara receives approximately 101 sunshine hours per year. The sunniest month is August with around 10 hours. Based on climate data for Sagara.
The least favorable months to visit Sagara are February, August, primarily due to frequent rain. For the best conditions, consider May, June, September, October, November instead.
The annual average UV index in Sagara is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Sagara is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September, October average 25°C (77°F), which is warm and comfortable for swimming and water activities.
Yes, Sagara receives snow. Months with snowfall average 1 snow days and 0 cm (0 in) of accumulation, with about 0 frost days during winter.
Average wind speeds in Sagara are 19 km/h (12 mph). The windiest month is January with peak winds reaching 23 km/h (14 mph) (gusts up to 49 km/h / 30 mph).
Sagara averages 7 clear-sky days per month with overall cloud cover around 55%. The clearest skies occur in January.
The annual average dew point in Sagara is 13°C (55°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Sagara 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 Sagara ranges from 15°C (59°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 Sagara. It earns a climate score of 7.6/10 with Excellent.
For June in Sagara, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 24°C (76°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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