Okayama weather by month & the best time to visit
Japan · city break · humid subtropical climate
The best time to visit Okayama is August — its sunniest month (Sunshine Score 68/100), with May and October close behind. Okayama averages about 1,914 hours of sunshine a year. Daytime highs around 30°C / 86°F and roughly 120 mm of rain in August.
When is the best time to visit Okayama?
For sunshine, the best time to visit Okayama is August, then May and October. The dullest month is January (0/100, 86 mm of rain). The full month-by-month picture is in the table below.
How sunny is Okayama?
Okayama gets a moderate 1,914 hours of sunshine a year. 68 Sunshine Score points separate August (68) from January (0), so the month you pick matters. It ranks #12 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. The year's 1,487 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 |
|---|---|---|---|---|---|
| January | 0 | 5° / 41°F | -2° / 28°F | 86 mm | 2 |
| February | 0 | 7° / 45°F | -2° / 28°F | 81 mm | 3 |
| March | 18 | 11° / 52°F | 1° / 34°F | 103 mm | 4 |
| April | 53 | 17° / 63°F | 5° / 41°F | 105 mm | 5 |
| May | 67 | 23° / 73°F | 11° / 52°F | 122 mm | 6 |
| June | 62 | 26° / 79°F | 16° / 61°F | 172 mm | 6 |
| July | 62 | 29° / 84°F | 21° / 70°F | 212 mm | 7 |
| August | 68 | 30° / 86°F | 22° / 72°F | 120 mm | 8 |
| September | 62 | 26° / 79°F | 17° / 63°F | 179 mm | 6 |
| October | 67 | 20° / 68°F | 11° / 52°F | 122 mm | 5 |
| November | 37 | 14° / 57°F | 5° / 41°F | 83 mm | 3 |
| December | 0 | 8° / 46°F | 0° / 32°F | 102 mm | 2 |
Head-to-head
How Okayama compares month by month: Okayama vs Hiroshima · Okayama vs Tottori · Okayama vs Takamatsu · Okayama vs Izumo · all comparisons
Okayama: questions and answers
What kind of destination is Okayama?
Okayama is a city break in Japan with a humid subtropical climate.
How many hours of sunshine does Okayama get a year?
Okayama gets about 1,914 hours of sunshine a year, at its best around August.
When is the best time to visit Okayama?
The sunniest time to visit Okayama is August, when the Sunshine Score peaks at 68/100 (with May and October close behind). Expect daytime highs around 30°C / 86°F.
What is the least sunny month in Okayama?
January is the least sunny month in Okayama, scoring 0/100 with about 86 mm of rain.
How strong is the sun in Okayama?
The typical midday UV index in Okayama peaks around 8 (very high) in August, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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