Oshamambe, Japan experiences average highs of 12°C (54°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have warmed by 1.9°C (3.4°F) across the available records.
Oshamambe, Japan Weather & Climate 2026
Monthly climate averages for Oshamambe, 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
4.8/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 12°C / 7°C
Feels Like 11°C / 5°C
Rainy Days 13
Rainfall 99 mm
Sunshine 8 h
Humidity 81%
Wind Speed 19 km/h
Dew Point 7°C
Snow Days 13 days
Frost Days 19 days
Hottest Month
25°C
August
Avg Low20°C
Rain16days
Coldest Month
-5°C
January
Avg High-1°C
Rain14days
Driest Month
10days
March
Avg High4°C
Avg Low-2°C
Windiest Month
23 km/h
December (Gusts 48)
Sea Temperature
4°C – 24°C
Warmest water: August (
24.4°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:02
Daylight 15.3h
Sunset 19:19
Live conditions—
Oshamambe on the map · live conditions
Oshamambe, Japan
- Continent
- Asia
- Country
- Japan
- City
- Oshamambe
- Population
- 5.7K
- Coordinates
- 42.51°, 140.38°
Seasonal Breakdown
Spring
Mar–May
Avg High 10°C
Avg Low 4°C
Rain 10 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 23°C
Avg Low 18°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 10°C
Rain 14 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 0°C
Avg Low -4°C
Rain 15 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 / -5°C . Feb: 0°C / -5°C . Mar: 4°C / -2°C . Apr: 11°C / 3°C . May: 17°C / 9°C . Jun: 20°C / 14°C . Jul: 25°C / 19°C . Aug: 25°C / 20°C . Sep: 22°C / 17°C . Oct: 15°C / 10°C . Nov: 8°C / 4°C . Dec: 1°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 65 mm. Feb: 55 mm. Mar: 71 mm. Apr: 75 mm. May: 75 mm. Jun: 112 mm. Jul: 115 mm. Aug: 183 mm. Sep: 137 mm. Oct: 107 mm. Nov: 101 mm. Dec: 87 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 77%. Mar: 79%. Apr: 79%. May: 81%. Jun: 86%. Jul: 89%. Aug: 89%. Sep: 85%. Oct: 80%. Nov: 77%. Dec: 77%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 21 km/h . Feb: 21 km/h . Mar: 19 km/h . Apr: 19 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 14 km/h . Aug: 16 km/h . Sep: 17 km/h . Oct: 19 km/h . Nov: 21 km/h . Dec: 23 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 9h. Apr: 10h. May: 10h. Jun: 10h. Jul: 9h. Aug: 8h. Sep: 8h. Oct: 8h. Nov: 7h. Dec: 6h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 6°C . Feb: 4°C . Mar: 4°C . Apr: 6°C . May: 11°C . Jun: 16°C . Jul: 22°C . Aug: 24°C . Sep: 24°C . Oct: 19°C . Nov: 13°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 5. Sep: UV 5. Oct: UV 4. Nov: UV 2. 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: 23 days. Feb: 20 days. Mar: 13 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 9 days. Dec: 25 days.
Climate Trends
Average highs have warmed by 1.9°C (3.4°F) across the available records. Average rainfall has remained broadly steady.
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 · -4°C | Jan · -5°C |
| Wettest month | Sep 2025 · 228 mm | Aug · 183 mm |
| Windiest month | Dec 2025 · 24 km/h | Dec · 23 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 / -5°C | -6°C / -10°C | 14days (65 mm) Wet | 6.8h Fair | 78% Humid | 2.2 Moderate | Poor | View Details |
| February | 0°C / -5°C | -5°C / -10°C | 12days (55 mm) Wet | 7.9h Good | 77% Humid | 3.3 Moderate | Poor | View Details |
| March | 4°C / -2°C | 1°C / -6°C | 10days (71 mm) Wet | 8.9h Good | 79% Humid | 4.4 Moderate | Poor | View Details |
| April | 11°C / 3°C | 8°C / 0°C | 10days (75 mm) Wet | 9.5h Good | 79% Humid | 5 Moderate | Fair | View Details |
| May best | 17°C / 9°C | 16°C / 7°C | 11days (75 mm) Wet | 9.9h Good | 81% Humid | 6 High | Good | View Details |
| June best | 20°C / 14°C | 21°C / 13°C | 11days (112 mm) Wet | 9.5h Good | 86% Very Muggy | 5.9 High | Excellent | View Details |
| July best | 25°C / 19°C | 27°C / 21°C | 11days (115 mm) Wet | 8.7h Good | 89% Very Muggy | 5.8 High | Excellent | View Details |
| August best | 25°C / 20°C | 29°C / 23°C | 16days (183 mm) Wet | 7.8h Good | 89% Very Muggy | 5.3 High | Excellent | View Details |
| September best | 22°C / 17°C | 23°C / 18°C | 11days (137 mm) Wet | 8.3h Good | 85% Humid | 4.8 Moderate | Excellent | View Details |
| October | 15°C / 10°C | 14°C / 8°C | 14days (107 mm) Wet | 7.9h Good | 80% Humid | 3.5 Moderate | Good | View Details |
| November | 8°C / 4°C | 5°C / -1°C | 16days (101 mm) Wet | 6.8h Fair | 77% Humid | 2.3 Moderate | Poor | View Details |
| December | 1°C / -3°C | -3°C / -8°C | 20days (87 mm) Wet | 5.9h Fair | 77% Humid | 1.9 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Oshamambe 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 Oshamambe, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Oshamambe is August, with average daytime highs of 25°C (77°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Oshamambe is January, with average overnight lows of -5°C (23°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Oshamambe is August, averaging 183mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Oshamambe runs through December, August, November, January, with the heaviest rainfall in December. Based on 10-year averages for Oshamambe.
Oshamambe receives approximately 98 sunshine hours per year. The sunniest month is May with around 10 hours. Based on climate data for Oshamambe.
The least favorable months to visit Oshamambe 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 Oshamambe is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Oshamambe is 81%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes — sea temperatures in August, September average 24°C (75°F), which is warm and comfortable for swimming and water activities.
Yes, Oshamambe receives snow. Months with snowfall average 13 snow days and 24 cm (9 in) of accumulation, with about 19 frost days during winter.
Average wind speeds in Oshamambe are 19 km/h (12 mph). The windiest month is December with peak winds reaching 23 km/h (14 mph) (gusts up to 48 km/h / 30 mph).
Oshamambe averages 1 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in May.
The annual average dew point in Oshamambe is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Oshamambe 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 Oshamambe 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, June is a great time to visit Oshamambe. It earns a climate score of 7.7/10 with Excellent.
For June in Oshamambe, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 20°C (68°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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