Shonai weather by month & the best time to visit
Japan · beach resort · humid subtropical climate
The best time to visit Shonai is June — its sunniest month (Sunshine Score 65/100), with May and September close behind. Shonai averages about 1,396 hours of sunshine a year. Daytime highs around 24°C / 75°F and roughly 116 mm of rain in June.
When is the best time to visit Shonai?
For sunshine, the best time to visit Shonai is June, then May and September. The dullest month is January (0/100, 159 mm of rain). The full month-by-month picture is in the table below.
How sunny is Shonai?
Shonai isn't a sunny place by world standards: about 1,396 hours of sunshine a year. 65 Sunshine Score points separate June (65) from January (0), so the month you pick matters. It ranks #78 of 79 destinations in Japan for annual sunshine, below the national median of 1,773 hours. The year's 1,767 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 | -1° / 30°F | 159 mm | 1 | 11° / 52°F |
| February | 0 | 3° / 37°F | -2° / 28°F | 105 mm | 2 | 10° / 50°F |
| March | 0 | 7° / 45°F | 1° / 34°F | 107 mm | 3 | 9° / 48°F |
| April | 28 | 13° / 55°F | 5° / 41°F | 100 mm | 4 | 12° / 54°F |
| May | 62 | 19° / 66°F | 11° / 52°F | 103 mm | 5 | 16° / 61°F |
| June | 65 | 24° / 75°F | 16° / 61°F | 116 mm | 6 | 22° / 72°F |
| July | 59 | 27° / 81°F | 20° / 68°F | 211 mm | 6 | 25° / 77°F |
| August | 59 | 29° / 84°F | 21° / 70°F | 186 mm | 7 | 29° / 84°F |
| September | 60 | 25° / 77°F | 18° / 64°F | 145 mm | 5 | 27° / 81°F |
| October | 49 | 18° / 64°F | 11° / 52°F | 165 mm | 3 | 23° / 73°F |
| November | 20 | 12° / 54°F | 6° / 43°F | 173 mm | 2 | 18° / 64°F |
| December | 0 | 6° / 43°F | 1° / 34°F | 197 mm | 1 | 13° / 55°F |
Sea temperature in Shonai by month
The sea off Shonai is warmest in August at around 29°C / 84°F, and coolest in March at 9°C / 48°F. The water sits at a comfortable 21°C or warmer roughly 5 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Shonai compares month by month: Shonai vs Sendai · Shonai vs Niigata · Shonai vs Akita · Shonai vs Yamagata · all comparisons
Shonai: questions and answers
What kind of destination is Shonai?
Shonai is a beach resort in Japan with a humid subtropical climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) about 5 months a year.
How many hours of sunshine does Shonai get a year?
Shonai gets about 1,396 hours of sunshine a year, at its best around June.
When is the best time to visit Shonai?
The sunniest time to visit Shonai is June, when the Sunshine Score peaks at 65/100 (with May and September close behind). Expect daytime highs around 24°C / 75°F.
What is the least sunny month in Shonai?
January is the least sunny month in Shonai, scoring 0/100 with about 159 mm of rain.
What is the sea temperature in Shonai?
The sea in Shonai ranges from about 9°C (March) to 29°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Shonai?
The typical midday UV index in Shonai peaks around 7 (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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