Weather is one of the most reliable external factors affecting NFL game totals. Understanding the correlation helps you find edges in weather-impacted games.
The Weather Variables That Matter
Wind: The biggest factor for totals. Wind above 15 mph consistently reduces scoring by limiting passing efficiency.
- 15-20 mph: Minor effect on passing
- 20-25 mph: Moderate impact — consider value on unders
- 25+ mph: Significant impact — quarterbacks and kickers both affected
Temperature: Below 20°F, players show diminished performance. Below 10°F, the effect is more pronounced.
Rain/Snow: Heavy rain affects ball handling and footing. Snow games tend to produce lower totals.
Historical Data on Wind
Studies consistently show:
- Games with sustained winds > 20 mph go under at ~54-57% rates
- Dome teams playing outdoors in wind underperform most
- Kickers miss field goals at higher rates, removing points from totals
How to Apply It
- Check the weather forecast Thursday-Friday for Sunday games
- If a game is projected for 25+ mph wind, the total may still be set for normal conditions
- Look for cases where the opening total doesn't reflect weather that developed after the line was set
The Caveat
Books are aware of weather too. Major storms in week-long forecasts are usually priced in. The edge comes when weather changes late in the week after lines have set.
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