Sendai weather by month & the best time to visit
Japan · major coastal city · humid subtropical climate
The best time to visit Sendai is May — its sunniest month (Sunshine Score 72/100), with June and September close behind. Sendai averages about 1,521 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 86 mm of rain in May.
When is the best time to visit Sendai?
For sunshine, the best time to visit Sendai is May, then June and September. The dullest month is January (0/100, 97 mm of rain). The full month-by-month picture is in the table below.
How sunny is Sendai?
Sendai isn't a sunny place by world standards: about 1,521 hours of sunshine a year. 72 Sunshine Score points separate May (72) from January (0), so the month you pick matters. It ranks #68 of 79 destinations in Japan for annual sunshine, below the national median of 1,773 hours. The year's 1,361 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 3° / 37°F | -4° / 25°F | 97 mm | 1 | 10° / 50°F |
| February | 0 | 4° / 39°F | -3° / 27°F | 62 mm | 2 | 12° / 54°F |
| March | 6 | 9° / 48°F | 0° / 32°F | 82 mm | 3 | 11° / 52°F |
| April | 48 | 16° / 61°F | 5° / 41°F | 84 mm | 4 | 14° / 57°F |
| May | 72 | 21° / 70°F | 11° / 52°F | 86 mm | 5 | 17° / 63°F |
| June | 67 | 25° / 77°F | 16° / 61°F | 113 mm | 5 | 20° / 68°F |
| July | 60 | 29° / 84°F | 20° / 68°F | 202 mm | 5 | 24° / 75°F |
| August | 60 | 30° / 86°F | 21° / 70°F | 149 mm | 6 | 27° / 81°F |
| September | 62 | 26° / 79°F | 17° / 63°F | 138 mm | 5 | 25° / 77°F |
| October | 61 | 20° / 68°F | 11° / 52°F | 143 mm | 3 | 22° / 72°F |
| November | 29 | 13° / 55°F | 4° / 39°F | 94 mm | 2 | 18° / 64°F |
| December | 0 | 6° / 43°F | -1° / 30°F | 111 mm | 1 | 15° / 59°F |
Sea temperature in Sendai by month
The sea off Sendai is warmest in August at around 27°C / 81°F, and coolest in January at 10°C / 50°F. The water sits at a comfortable 21°C or warmer roughly 4 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Sendai compares month by month: Sendai vs Niigata · Sendai vs Ibaraki · Sendai vs Yamagata · Sendai vs Hanamaki · all comparisons
Sendai: questions and answers
What kind of destination is Sendai?
Sendai is a major coastal city in Japan with a humid subtropical climate — the sea reaches 27°C at its warmest and is swimmable (21°C+) about 4 months a year.
How many hours of sunshine does Sendai get a year?
Sendai gets about 1,521 hours of sunshine a year, at its best around May.
When is the best time to visit Sendai?
The sunniest time to visit Sendai is May, when the Sunshine Score peaks at 72/100 (with June and September close behind). Expect daytime highs around 21°C / 70°F.
What is the least sunny month in Sendai?
January is the least sunny month in Sendai, scoring 0/100 with about 97 mm of rain.
What is the sea temperature in Sendai?
The sea in Sendai ranges from about 10°C (January) to 27°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Sendai?
The typical midday UV index in Sendai peaks around 6 (high) in August, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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