Weather in Japan in May

So you're interested in going to Japan in May

May is a hot and slightly rainy time for sunbathing in Japan. May is a good month for swimming in Japan with warm sea temperatures. Consider visiting Japan in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Temperature in Japan in May

The average maximum temperature in Japan in May is 26°. The average maximum temperature is 23° in the previous month and 29° in the next month.

The average temperature in Japan in May is 24°. The average temperature ranges is 21° in the previous month and 27° in the next month.

The average minimum temperature in Japan in May is 22°. The minimum temperature is 19° in the previous month and 25° in the next month.

Sunshine in Japan in May

The average day light hours per day in Japan in May are 13.4 and there are 7.3 hours of sunshine per day on average during May making it a quite sunny month with some cloud cover.

The ultraviolet index in Japan in May is typically 12.2 during May. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Japan in May

The average sea water temperature in Japan in May is 24.2° which is warm and pleasant for relaxing and swimming for long periods.

Rainfall in Japan in May

The average total rainfall in Japan in May is 2.7cm and on average there are 14.3 rainy days in May making it a slightly wet time to visit the beach.

Humidity in Japan in May

The maximum dew point (an indicator of humidity) in Japan in May is 22° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 18° in the previous month and 25° in the next month.

The average maximum relative humidity in Japan in May is typically 88.3%. The maximum relative humidity is 84.3% in the previous month and 90.4% in the next month.

The average relative humidity in Japan in May is typically 77.4%. The average relative humidity is 72.8% in the previous month and 81% in the next month.

Wind Speed in Japan in May

The average maximum wind speed in Japan in May is typically 25kmh. The average maximum wind speed is 26kmh in the previous month and 26kmh in the next month.

The average wind speed in Japan in May is typically 17kmh. The average wind speed is 18kmh in the previous month and 18kmh in the next month.

The average wind direction in Japan in May is from the East-Southeast.

Monthly Averages

Suggested Beaches in May

Book Accomodation Deals