The summer of 1999 will be hotter than usual throughout the Japanese archipelago, except in northern Japan, the Meteorological Agency announced Thursday.
According to the agency's three-month weather forecast, well-developed high-pressure systems over the Pacific should boost temperatures on clear days, even during the rainy season in June.
And more sunny days than usual are expected in August, it said.
The agency said it predicts average precipitation for the summer because it declared the beginning of Okinawa's rainy season as usual on May 10, and because no abnormal weather patterns have been observed.
The agency gave up its rainy season declaration for Tohoku last year because of unusual rain patterns. But summer temperatures for the northern Japan region should be average this year.