UTC Offset
UTC+09:00
Sai, Japan Snapshot 2026
Where is Sai?
Sai, Japan
- Continent
- Asia
- Country
- Japan
- City
- Sai
- Population
- 1.9K
- Coordinates
- 41.43°, 140.86°
Sai is a city in Japan with a population of approximately 1.9K. Average temperatures range from -1°C (30°F) in January to 24°C (76°F) in August. The best time to visit is June, July, August, September.
Time in Sai right now
Open full time & time zone page 21:02 02
Tuesday, June 16, 2026
IANA time zone
Asia/Tokyo
Daylight saving
No DST
Next DST change
—
Live weather in Sai
Daylight in Sai today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 09m
Climate normals for Sai
Long-term monthly averages based on historical data.
January
Wet 
February
Wet March
Poor April
Poor May
Fair June best
Good July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -1°C | -5°C / -9°C | 22days (127 mm) Wet | 6.7h Fair | 69% Muggy | 2.1 Moderate | Wet | View Details |
| February | 2°C / -1°C | -4°C / -9°C | 19days (109 mm) Wet | 7.7h Good | 68% Muggy | 3.1 Moderate | Wet | View Details |
| March | 6°C / 3°C | 1°C / -4°C | 13days (85 mm) Wet | 8.9h Good | 70% Muggy | 4.3 Moderate | Poor | View Details |
| April | 10°C / 7°C | 6°C / 1°C | 11days (90 mm) Wet | 9.5h Good | 75% Muggy | 5.4 High | Poor | View Details |
| May | 14°C / 11°C | 12°C / 7°C | 10days (91 mm) Wet | 10h Excellent | 83% Humid | 6.2 High | Fair | View Details |
| June best | 17°C / 15°C | 17°C / 13°C | 10days (104 mm) Wet | 9.7h Good | 89% Very Muggy | 6.5 High | Good | View Details |
| July best | 22°C / 20°C | 23°C / 20°C | 11days (116 mm) Wet | 9.1h Good | 91% Very Muggy | 6.6 High | Excellent | View Details |
| August best | 24°C / 22°C | 27°C / 22°C | 13days (203 mm) Wet | 8.5h Good | 86% Very Muggy | 6.1 High | Excellent | View Details |
| September best | 22°C / 20°C | 23°C / 18°C | 11days (133 mm) Wet | 8.5h Good | 75% Muggy | 5.3 High | Excellent | View Details |
| October | 17°C / 14°C | 14°C / 9°C | 13days (124 mm) Wet | 7.9h Good | 67% Muggy | 3.8 Moderate | Fair | View Details |
| November | 10°C / 6°C | 5°C / 0°C | 16days (116 mm) Wet | 6.7h Fair | 67% Muggy | 2.5 Moderate | Poor | View Details |
| December | 4°C / 1°C | -2°C / -8°C | 24days (157 mm) Wet | 6h Fair | 69% Muggy | 1.7 Low | Wet | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 2°C / -1°C . Feb: 2°C / -1°C . Mar: 6°C / 3°C . Apr: 10°C / 7°C . May: 14°C / 11°C . Jun: 17°C / 15°C . Jul: 22°C / 20°C . Aug: 24°C / 22°C . Sep: 22°C / 20°C . Oct: 17°C / 14°C . Nov: 10°C / 6°C . Dec: 4°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 127 mm. Feb: 109 mm. Mar: 85 mm. Apr: 90 mm. May: 91 mm. Jun: 104 mm. Jul: 116 mm. Aug: 203 mm. Sep: 133 mm. Oct: 124 mm. Nov: 116 mm. Dec: 157 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 68%. Mar: 70%. Apr: 75%. May: 83%. Jun: 89%. Jul: 91%. Aug: 86%. Sep: 75%. Oct: 67%. Nov: 67%. Dec: 69%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 44 km/h . Feb: 44 km/h . Mar: 39 km/h . Apr: 37 km/h . May: 33 km/h . Jun: 29 km/h . Jul: 28 km/h . Aug: 33 km/h . Sep: 33 km/h . Oct: 37 km/h . Nov: 41 km/h . Dec: 46 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 8°C . Feb: 7°C . Mar: 8°C . Apr: 11°C . May: 14°C . Jun: 19°C . Jul: 24°C . Aug: 27°C . Sep: 25°C . Oct: 20°C . Nov: 15°C . Dec: 10°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.
Frequently Asked Questions
Sai has a population of approximately 1.9K.
The best months to visit Sai are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Sai receives approximately 1455mm of rainfall annually across 173 rainy days.
Sai is located in Japan, in the Asia region.