UTC Offset
UTC+09:00
Kosaka, Japan Snapshot 2026
Where is Kosaka?
Kosaka, Japan
- Continent
- Asia
- Country
- Japan
- City
- Kosaka
- Population
- 4.8K
- Coordinates
- 40.38°, 140.73°
Kosaka is a city in Japan with a population of approximately 4.8K. Average temperatures range from -7°C (20°F) in January to 27°C (80°F) in August. The best time to visit is May, June, July, September, October.
Time in Kosaka right now
Open full time & time zone page 23:52 52
Friday, May 8, 2026
IANA time zone
Asia/Tokyo
Daylight saving
No DST
Next DST change
—
Live weather in Kosaka
Daylight in Kosaka today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 10m
Climate normals for Kosaka
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Poor May best
Good June best
Excellent July best
Good August
Wet September best
Excellent October best
Good November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 0°C / -7°C | -5°C / -11°C | 17days (85 mm) Wet | 6.8h Fair | 83% Humid | 2.4 Moderate | Poor | View Details |
| February | 1°C / -6°C | -4°C / -10°C | 17days (87 mm) Wet | 7.5h Good | 80% Humid | 3.3 Moderate | Poor | View Details |
| March | 6°C / -2°C | 2°C / -6°C | 15days (99 mm) Wet | 8.4h Good | 79% Humid | 4.2 Moderate | Poor | View Details |
| April | 12°C / 3°C | 10°C / 0°C | 15days (111 mm) Wet | 8.9h Good | 76% Humid | 5.4 High | Poor | View Details |
| May best | 18°C / 9°C | 18°C / 7°C | 13days (105 mm) Wet | 9.4h Good | 78% Humid | 5.7 High | Good | View Details |
| June best | 22°C / 14°C | 23°C / 14°C | 15days (130 mm) Wet | 9.2h Good | 84% Humid | 6.6 High | Excellent | View Details |
| July best | 26°C / 19°C | 29°C / 21°C | 17days (165 mm) Wet | 8.7h Good | 88% Very Muggy | 6.3 High | Good | View Details |
| August | 27°C / 20°C | 30°C / 23°C | 17days (196 mm) Wet | 8.4h Good | 87% Very Muggy | 6.4 High | Wet | View Details |
| September best | 23°C / 16°C | 24°C / 16°C | 13days (136 mm) Wet | 8h Good | 85% Humid | 5.3 High | Excellent | View Details |
| October best | 16°C / 9°C | 14°C / 7°C | 13days (133 mm) Wet | 7.3h Good | 83% Humid | 3.7 Moderate | Good | View Details |
| November | 9°C / 2°C | 6°C / -1°C | 16days (100 mm) Wet | 6.5h Fair | 82% Humid | 2.5 Moderate | Poor | View Details |
| December | 2°C / -4°C | -3°C / -9°C | 19days (111 mm) Wet | 6h Fair | 83% Humid | 1.9 Low | Wet | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 0°C / -7°C . Feb: 1°C / -6°C . Mar: 6°C / -2°C . Apr: 12°C / 3°C . May: 18°C / 9°C . Jun: 22°C / 14°C . Jul: 26°C / 19°C . Aug: 27°C / 20°C . Sep: 23°C / 16°C . Oct: 16°C / 9°C . Nov: 9°C / 2°C . Dec: 2°C / -4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 85 mm. Feb: 87 mm. Mar: 99 mm. Apr: 111 mm. May: 105 mm. Jun: 130 mm. Jul: 165 mm. Aug: 196 mm. Sep: 136 mm. Oct: 133 mm. Nov: 100 mm. Dec: 111 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 80%. Mar: 79%. Apr: 76%. May: 78%. Jun: 84%. Jul: 88%. Aug: 87%. Sep: 85%. Oct: 83%. Nov: 82%. Dec: 83%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 20 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 16 km/h . Jun: 14 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 15 km/h . Nov: 17 km/h . Dec: 18 km/h .
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 6. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Kosaka has a population of approximately 4.8K.
The best months to visit Kosaka are May, June, July, September, October, when temperatures are pleasant and rainfall is lower.
Kosaka receives approximately 1458mm of rainfall annually across 187 rainy days.
Kosaka is located in Japan, in the Asia region.