Nippon Professional Baseball stadium weather
One permanent weather page per NPB park. Live conditions update from nearby stations; the venue notes explain why each park — from open-air Koshien and Mazda Stadium to Tokyo Dome — treats weather differently. All times are shown in local time (JST).
We have published the first NPB weather study using 3,460 dry open-air games from 2018–2025. Heat added runs, cold suppressed them, and high wind lifted scoring, while rain showed no measurable effect. Read the NPB temperature, wind and scoring study or browse all research.
What the research says
Our NPB temperature, wind and scoring study covers 3,460 dry open-air games across 45 grounds from 2018–2025. Findings: 80°F+ added about 0.61 runs per game (t=3.54, n=1,121); 50–59°F reduced scoring by about 0.66 runs (t=-2.40, n=277); wind of 20 mph and over added about 1.44 runs (t=2.70, n=108); and rain was not a reliable signal. We do not report a wind-direction result because park orientations could not be verified, and we have no historical closing-total dataset, so these are scoring findings, not proven betting edges.
NPB stadiums
- Meiji Jingu Stadium weather
Tokyo Yakult Swallows · Tokyo
Live weather and game-time forecast for Meiji Jingu Stadium, home of the Tokyo Yakult Swallows.
- Koshien Stadium weather
Hanshin Tigers · Nishinomiya
Live weather and game-time forecast for Koshien Stadium, the historic open-air home of the Hanshin Tigers.
- Yokohama Stadium weather
Yokohama DeNA BayStars · Yokohama
Live weather and game-time forecast for Yokohama Stadium, home of the Yokohama DeNA BayStars.
- Mazda Zoom-Zoom Stadium weather
Hiroshima Toyo Carp · Hiroshima
Live weather and game-time forecast for Mazda Zoom-Zoom Stadium, home of the Hiroshima Toyo Carp.
- Zozo Marine Stadium weather
Chiba Lotte Marines · Chiba
Live weather and game-time forecast for Zozo Marine Stadium, the windswept home of the Chiba Lotte Marines.
- Rakuten Mobile Park Miyagi weather
Tohoku Rakuten Golden Eagles · Sendai
Live weather and game-time forecast for Rakuten Mobile Park Miyagi, home of the Tohoku Rakuten Golden Eagles.
- Belluna Dome weather
Saitama Seibu Lions · Tokorozawa
Live weather and game-time forecast for Belluna Dome, the half-open home of the Saitama Seibu Lions.
- Tokyo Dome weather
Yomiuri Giants · Tokyo
Venue guide for Tokyo Dome, home of the Yomiuri Giants — a fully enclosed dome where weather never reaches the field.
- Kyocera Dome Osaka weather
Orix Buffaloes · Osaka
Venue guide for Kyocera Dome Osaka, home of the Orix Buffaloes — a fully enclosed dome where weather never reaches the field.
- Vantelin Dome Nagoya weather
Chunichi Dragons · Nagoya
Venue guide for Vantelin Dome Nagoya, home of the Chunichi Dragons — a fully enclosed dome where weather never reaches the field.
- Es Con Field Hokkaido weather
Hokkaido Nippon-Ham Fighters · Kitahiroshima
Live weather and game-time forecast for Es Con Field Hokkaido, the retractable-roof home of the Nippon-Ham Fighters.
- Mizuho PayPay Dome Fukuoka weather
Fukuoka SoftBank Hawks · Fukuoka
Venue guide for Mizuho PayPay Dome Fukuoka, home of the SoftBank Hawks — a retractable-roof park that plays almost entirely indoors.
How weather moves NPB games
Japanese baseball is played through a humid summer, a June–July rainy season, and August–September typhoon risk — while half the league's games are inside domes that neutralize all of it. Whether wind reaches the outfield, how humid summer air carries the ball, and when storms hit the schedule all change from park to park, which is why every NPB venue here gets its own page.