Sendai Weather
Sendai weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Apr, May, Jun, Sep and Oct.
Sendai current weather
Sendai now (local time 01:45)
15°C
Mostly clear
- Feels like
- 15°
- Humidity
- 89%
- Wind
- 4 km/h
Next 7 days · what to wear
8° – 24°C
Rain likely on 1 of 7 days
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Sendai 14-day forecast
Today
10/5
🌦️
22°
15°
💧76%
Tue
10/6
⛅
24°
17°
💧12%
Wed
10/7
☀️
23°
11°
💧4%
Thu
10/8
☀️
22°
8°
💧0%
Fri
10/9
☀️
22°
9°
💧0%
Sat
10/10
🌤️
21°
11°
💧2%
Sun
10/11
☀️
22°
11°
💧4%
Mon
10/12
⛅
20°
12°
💧14%
Tue
10/13
☁️
21°
12°
💧34%
Wed
10/14
🌤️
22°
11°
💧27%
Thu
10/15
🌦️
19°
12°
💧41%
Fri
10/16
☁️
22°
14°
💧26%
Sat
10/17
🌦️
20°
16°
💧14%
Sun
10/18
🌦️
20°
13°
💧22%
Best time to visit Sendai
On temperature and rainfall, the most comfortable months in Sendai are Apr, May, Jun, Sep and Oct. The hottest month is August (average high 29°C) and the coldest is January (average low -4°C).
Sendai climate by month
| Month | Avg high | Avg low | Rain | Humidity | vs Hong Kong |
|---|---|---|---|---|---|
| Jan | 2°C | -4°C | 126 mm | 95% | -18°C |
| Feb | 3°C | -4°C | 81 mm | 94% | -18°C |
| Mar | 7°C | -1°C | 93 mm | 88% | -17°C |
| AprBest | 15°C | 4°C | 92 mm | 82% | -14°C |
| MayBest | 21°C | 10°C | 94 mm | 81% | -11°C |
| JunBest | 25°C | 15°C | 116 mm | 83% | -9°C |
| Jul | 28°C | 19°C | 204 mm | 86% | -5°C |
| Aug | 29°C | 20°C | 168 mm | 85% | -4°C |
| SepBest | 25°C | 16°C | 142 mm | 87% | -8°C |
| OctBest | 19°C | 10°C | 153 mm | 87% | -12°C |
| Nov | 12°C | 4°C | 127 mm | 89% | -15°C |
| Dec | 5°C | -1°C | 150 mm | 93% | -16°C |
Data: NASA POWER 2001–2020 climatology (MERRA-2, elevation-corrected); Hong Kong comparison uses HKO 1991–2020 normals.
Sendai weather month by month: what to wear
Sendai in OctoberBest monthThis month
October in Sendai is mild and cool: average highs of 19°C and lows of 10°C, around 153 mm of rain (wet) and 87% humidity — about 12°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; it's wet, so pack a compact umbrella.
Sendai in November
November in Sendai is chilly: average highs of 12°C and lows of 4°C, around 127 mm of rain (some rain) and 89% humidity — about 15°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker.
Sendai in December
December in Sendai is cold: average highs of 5°C and lows of -1°C, around 150 mm of rain (wet) and 93% humidity — about 16°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf; it's wet, so pack a compact umbrella.
Sendai in January
January in Sendai is freezing: average highs of 2°C and lows of -4°C, around 126 mm of rain (some rain) and 95% humidity — about 18°C colder than Hong Kong.
👕 A down jacket, thermal base layers, scarf and gloves; snow is possible.
Sendai in February
February in Sendai is freezing: average highs of 3°C and lows of -4°C, around 81 mm of rain (some rain) and 94% humidity — about 18°C colder than Hong Kong.
👕 A down jacket, thermal base layers, scarf and gloves; snow is possible.
Sendai in March
March in Sendai is cold: average highs of 7°C and lows of -1°C, around 93 mm of rain (some rain) and 88% humidity — about 17°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Sendai in AprilBest month
April in Sendai is chilly: average highs of 15°C and lows of 4°C, around 92 mm of rain (some rain) and 82% humidity — about 14°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 A sweater plus a coat or windbreaker; big day–night swing, so dress in layers.
Sendai in MayBest month
May in Sendai is mild and cool: average highs of 21°C and lows of 10°C, around 94 mm of rain (some rain) and 81% humidity — about 11°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Sendai in JuneBest month
June in Sendai is pleasantly warm: average highs of 25°C and lows of 15°C, around 116 mm of rain (some rain) and 83% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Sendai in July
July in Sendai is warm to hot: average highs of 28°C and lows of 19°C, around 204 mm of rain (wet) and 86% humidity — about 5°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; big day–night swing, so dress in layers; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Sendai in August
August in Sendai is warm to hot: average highs of 29°C and lows of 20°C, around 168 mm of rain (wet) and 85% humidity — about 4°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; big day–night swing, so dress in layers; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Sendai in SeptemberBest month
September in Sendai is pleasantly warm: average highs of 25°C and lows of 16°C, around 142 mm of rain (some rain) and 87% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors.
FAQ
›What is the best time to visit Sendai?
On temperature and rainfall, the most comfortable months in Sendai are Apr, May, Jun, Sep and Oct. The hottest month is August (average high 29°C) and the coldest is January (average low -4°C).
›What's the weather like in Sendai in October, and what should I wear?
October in Sendai is mild and cool: average highs of 19°C and lows of 10°C, around 153 mm of rain (wet) and 87% humidity — about 12°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater; it's wet, so pack a compact umbrella.
›What's the weather like in Sendai in November, and what should I wear?
November in Sendai is chilly: average highs of 12°C and lows of 4°C, around 127 mm of rain (some rain) and 89% humidity — about 15°C colder than Hong Kong. What to wear: A sweater plus a coat or windbreaker.
›When is the rainy season in Sendai?
Sendai is wettest in July, with about 204 mm on average, and driest in February, with about 81 mm.
›How cold does Sendai get? Does it snow?
The coldest month is January, averaging 2°C by day and -4°C at night. Nights regularly drop below freezing and snow is possible.
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Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: August; coldest: January.