Temperature, wind, and roof status for every MLB game today, sorted by how much the conditions help or hurt home runs. The HR factor below is weather-only — it strips out the stadium's fixed dimensions to isolate today's air. For each park's full picture see the parks board; for how wind and temperature move the ball, see park factor explained.
Warm air is less dense, so a batted ball carries farther — hot days tend to play as home-run-friendly. Wind matters even more: a stiff wind blowing out can turn warning-track outs into home runs, while wind blowing in suppresses them. BallBet isolates this with a weather-only park factor, separating today's conditions from the stadium's fixed dimensions.
Yes. Wind blowing out toward the outfield raises home run and run expectancy; wind blowing in lowers it; crosswinds mostly affect specific field angles. The effect scales with wind speed and is strongest in open-air parks — a closed roof neutralizes it entirely.
Home run rates rise fairly steadily with temperature. Games in the 90s°F play meaningfully more homer-friendly than games in the 50s°F, all else equal, because warmer, thinner air reduces drag on the ball.
Factors are model estimates centered at 1.00 (league-neutral), not guaranteed outcomes. Weather and lineups update through the day; check back near first pitch for the latest read.