Does weather actually move the total?

Weather is a filter, not a forecaster. In mild conditions — light wind, dry, moderate temperature — it tells you almost nothing, and those are the majority of games. Its value shows up at the extremes: strong wind through the ground, heavy rain, a wet deck, or heavy dew in a night game.

So the right way to use this site is as a check before you bet: you already have a view on the total, and you want to know whether the conditions at that specific venue argue with it. If the weather is unremarkable, the correct answer is "no signal" — and we show that instead of inventing one.

Wind is the biggest single lever. In baseball it decides whether fly balls carry or die; in football it gates the deep ball and field-goal range; in AFL it turns one end of the ground into a scoring end. Direction relative to the ground bearing matters more than raw speed, which is why we draw wind against the real stadium orientation rather than a compass arrow.

Rain and a wet deck slow the game and raise the error rate — more fumbles, more turnovers, fewer clean shots at goal. Cold and dense air reduce carry and kicking distance. Dew is the quiet one: a still, clear, humid night can leave a greasy ball late in an AFL or college game without a drop of rain falling.

Lean-agnostic hit rate: how often the weather read pointed the right way on the total. Anything under 30 graded games is marked thin — treat it as a work in progress, not a signal. A bucket sitting within three points of 50% is a coin flip, and we label it as one.

Updated automatically as games settle · last refresh 9/7/2026. Informational only, not betting advice.

Most rows will sit near 50%, and that is the expected result — a total is priced to be a near coin flip, so a weather read that only matters in a minority of games cannot move the overall number much. What is worth watching is whether the extreme buckets separate from the mild ones over time. Until they do across a real sample, treat the weather read as context, not conviction.

We publish forecast fidelity separately — how close our stadium forecasts land to the conditions the venue actually got — on the forecast accuracy page.

For a deeper look at how specific weather patterns affect totals, see our NFL Climate Shock study — a 10-season backtest on dome and warm-weather teams playing outdoors in cold and wind.