MLB Weather Report Today (September 23, 2026): Wind, Parks and HR Conditions
Weather is the one input that reprices a baseball slate every single day, and tonight's board has 13 outdoor games with 1 of them getting a real home run tailwind. The spot to know first: LAA @ ATH at Sutter Health Park — 70°F, wind 5 mph from the SW, and the model's wind factor sits at 1.16, the strongest HR boost on the slate.
In Summary: Tonight's Weather Board
- Wind helping homers: LAA @ ATH.
- Weather working against the over: NYM @ TEX, MIA @ CHC, STL @ PIT.
- Factor reads: above 1.10 = conditions add home run juice; below 0.90 = they take it away; 1.00 = the park playing its normal self.
Every Game, Every Park: The Full Weather Table
| Game | First Pitch | Park | Temp | Wind | LHB Factor | RHB Factor | Read |
|---|---|---|---|---|---|---|---|
| LAA @ ATH | 9:40 PM ET | Sutter Health Park | 70°F | 5 mph SW | — | 1.16 | HR boost |
| SD @ LAD | 10:10 PM ET | UNIQLO Field at Dodger Stadium | 67°F | 1 mph SSW | 1.03 | 1.03 | Near neutral |
| WSH @ DET | 1:10 PM ET | Comerica Park | 67°F | 16 mph ENE | 1.01 | 0.69 | Helps LHB power, works against RHB |
| NYM @ TEX | 8:05 PM ET | Globe Life Field | 89°F | 6 mph ENE | 0.82 | 0.88 | HR suppressor |
| MIA @ CHC | 7:40 PM ET | Wrigley Field | 61°F | 9 mph E | 0.74 | 0.88 | HR suppressor |
| STL @ PIT | 6:40 PM ET | PNC Park | 60°F | 8 mph ENE | 0.85 | — | HR suppressor |
| CIN @ ATL | 7:15 PM ET | Truist Park | 72°F | 8 mph E | — | 0.83 | HR suppressor |
| CWS @ KC | 7:40 PM ET | Kauffman Stadium | 69°F | 9 mph ENE | — | 0.79 | HR suppressor |
| HOU @ SEA | 10:10 PM ET | T-Mobile Park | 51°F | 6 mph ENE | 0.78 | — | HR suppressor |
| CLE @ BOS | 7:10 PM ET | Fenway Park | 54°F | 7 mph NE | — | 0.77 | HR suppressor |
| TB @ NYY | 7:05 PM ET | Yankee Stadium | 61°F | 10 mph NE | 0.75 | — | HR suppressor |
| TOR @ BAL | 1:35 PM ET | Oriole Park at Camden Yards | 64°F | 12 mph NE | 0.61 | 0.65 | HR suppressor |
| MIL @ PHI | 6:40 PM ET | Citizens Bank Park | 61°F | 12 mph NE | 0.63 | — | HR suppressor |
How to read the factorsthe model's park-aware wind multiplier on home run probability, split by batter handedness — it weights where each side's power actually goes against what the wind is doing to each part of that park tonight. That's why the same wind can read 0.96 for lefties and 1.19 for righties in the same game: the wind helps one field and fights the other. The number does the interpreting; when the two columns disagree, THAT disagreement is the story.
Where the Weather Helps the Ball Fly
LAA @ ATH, Sutter Health Park (9:40 PM ET) — 70°F with a 5 mph SW wind: wind factor 1.16 both ways, on a park already indexing 127.5 for homers.
Where the Weather Fights the Over
NYM @ TEX, Globe Life Field (8:05 PM ET) — wind factor 0.88 means conditions are taking carry off the ball tonight. Totals and HR props in this park deserve a longer look before backing the over.
MIA @ CHC, Wrigley Field (7:40 PM ET) — wind factor 0.88 means conditions are taking carry off the ball tonight. Totals and HR props in this park deserve a longer look before backing the over.
How Bettors Use This Page
Weather moves two markets: game totals and home run props. Books adjust for the obvious spots, so the edge is not "wind out, bet the over" — it is knowing which parks the weather ACTUALLY moves (the factor) and then shopping the number. The live MLB odds screen shows every book's total side by side, and the HR Cheat Sheet carries tonight's model-favorite bats with live prices. Weather is context, not a pick — prices are probabilities, and this page tells you where the conditions lean before you shop.
Bottom Line
1 park with a real HR tailwind tonight, 10 fighting it, and the rest near neutral. Check the factor, cross it with the Cheat Sheet's featured bats, and shop the price. Model estimates, not betting advice — lines move, weather changes, and the number you get matters more than the forecast.
