MLB Weather Today – Game Forecasts With Rain, Wind, Temperature

The CLEATZ MLB weather report today, Tuesday, April 21, 2026, gives you real-time, game-time forecasts for every outdoor Major League Baseball game on today’s slate. Every card shows temperature, precipitation chance, humidity, and, critically, the exact wind speed and direction oriented to that stadium’s field. Data refreshes every 30 minutes, so you’re always working from the most current forecast, not a morning snapshot that’s hours stale by first pitch.

Whether you’re setting DFS lineups on DraftKings or FanDuel, shopping a totals line, or deciding which Home Run props to back, weather is one of the few publicly available edges that the sharp money pays close attention to. This tool puts that same data in front of you before the books have fully adjusted.

Why MLB Weather Matters for Betting and DFS

Baseball is one of the only major professional sports played entirely in the open air, and unlike the NFL, where weather tends to affect both teams equally, baseball’s unique geometry means that wind direction relative to the field can create asymmetric advantages that smart bettors exploit on the totals market every single day of the 162-game season.

Here’s what the data shows across decades of games:

Wind Direction and the Over/Under

Wind is the single most actionable weather variable in MLB betting. When a strong wind is blowing out toward center or left-center field, fly balls carry further, warning-track outs become home runs, and run totals climb. Research tracking 15+ years of MLB games consistently shows that taking the over when the wind is blowing out, particularly at 10+ mph, produces win rates meaningfully above 50%. The inverse is equally reliable: when wind is blowing straight in from center field at 10 mph or more, pitchers gain a significant edge, and unders hit at a higher rate. The CLEATZ wind compass on every game card shows exactly which direction the wind is blowing relative to the stadium, so you can read it instantly.

Temperature and Run Scoring

Warm air is less dense than cold air, which means the ball travels farther. Research shows teams average roughly 4.2 runs per game when temperatures are below 60°F; that number jumps to over 4.7 runs per game in 80°F+ conditions. The difference is even more pronounced above 90°F. Early-season games in April and May at northern stadiums like Wrigley Field, Fenway Park, and Comerica Park are where this factor is most exploitable, since you can have 45°F conditions in Chicago while teams in Houston and Atlanta are playing in 75°F weather, a massive spread in expected run environments on the same slate.

Humidity and Ball Flight

High humidity reduces air density, which counterintuitively helps the ball travel further. It’s a smaller effect than temperature or wind, but it becomes relevant in close spots, like when you’re deciding between two similarly-priced HR props and one game is at 85°F with 80% humidity in Cincinnati while the other is at 65°F and dry in San Francisco.

Rain and Postponement Risk

A postponed game with players in your DFS lineup is an automatic zero. Even a precip chance of 40–50% around first pitch is enough to bench a high-ownership pitcher and look for a pivot. The CLEATZ weather dashboard flags elevated rain risk games so you can see at a glance which games on the slate carry postponement or delay risk. On the betting side, if a game is postponed mid-game before it becomes official (typically five innings), most sportsbooks will void the bet entirely, another reason to check the forecast before locking in a wager.

How to Use the CLEATZ MLB Weather Dashboard

The dashboard is designed for speed. Here’s how to get from the forecast to a decision in under two minutes:

1. Check the Summary Bar First

The four tiles at the top tell you at a glance how many outdoor games are on the slate, how many domes have no weather impact, and whether any games have elevated rain risk. If it says “2 rain risk games,” those are your immediate focus; figure out if you have exposure to those games before anything else.

2. Read the Wind Compass

Each outdoor game card has a wind compass showing exactly which direction the wind is blowing relative to that stadium. The arrow points in the direction the wind is traveling. A compass arrow pointing toward center field means wind is blowing out, favoring hitters, consider the over. An arrow pointing toward home plate means wind is blowing in favor of pitchers, lean under.

3. Check Game-Time Temperature

The headline temperature on each card is the game-time forecast, not the current temperature. For afternoon games in spring, this matters; a 1:05 PM first pitch in Detroit might be 44°F at game time, even if it feels milder in the morning. Sub-50°F games significantly suppress offense and are where pitchers earn their DFS salary.

4. Scan the Hourly Breakdown

The hourly table runs from two hours before first pitch through the likely final out window. The game-time column is highlighted in green. If the precipitation climbs from 5% at first pitch to 35% by the seventh inning, that game is worth monitoring for in-play betting or DFS late swap.

5. Ignore Dome Games

Any game listed as a retractable dome or fixed dome gets a distinct dimmed card; no weather data is shown because it’s irrelevant. You can safely focus your weather research exclusively on the outdoor games. The only MLB stadium with a completely fixed dome and zero weather influence is Tropicana Field in St. Petersburg.

Which MLB Stadiums Are Most Weather Sensitive

Not all outdoor stadiums respond to the weather the same way. Elevation, orientation, proximity to water, and local climate create very different weather environments across the league’s 20-plus outdoor parks.

High-Impact Weather Stadiums

Wrigley Field (Chicago Cubs) – The most weather-volatile park in baseball. Situated on the North Side of Chicago with no significant windbreaks, Wrigley is notorious for dramatic wind shifts. Wind blowing out to left at 15+ mph is one of the strongest over indicators in all of sports betting. Wind blowing in from Lake Michigan has the opposite effect. Always check Wrigley’s wind direction before setting any DFS lineups involving Cubs games.

Coors Field (Colorado Rockies) – Located at 5,280 feet above sea level, Coors Field sits in the thinnest air of any MLB park. The reduced air density means batted balls carry further regardless of wind, making it permanently one of the highest-scoring environments in baseball. Weather compounds this effect, warm summer nights in Denver turn Coors into an extreme over environment.

Fenway Park (Boston Red Sox) – Boston’s northeast location creates cold, blustery conditions in April and May. The 37-foot Green Monster in left field makes wind direction particularly significant — a wind blowing in from right to left can turn doubles off the wall into outs, while a tailwind from left to right opens up the right field bleachers.

Comerica Park (Detroit Tigers) – Detroit sits in the Great Lakes weather corridor. April and early May games here regularly see sub-50°F temperatures with wind off Lake St. Clair that genuinely suppresses scoring. Among the most reliable cold-weather under spots in the early season.

Guaranteed Rate Field (Chicago White Sox) – The South Side park is less famous than Wrigley but sits in the same Chicago weather system. More sheltered than Wrigley, but still wind-sensitive enough to warrant checking the compass before playing White Sox games.

Progressive Field (Cleveland Guardians) – Cleveland in April is one of the harshest early-season environments in the AL. The stadium sits near Lake Erie, and cold winds off the lake regularly push game-time temperatures below 45°F in the first month of the season.

Moderate Weather Impact

Nationals Park (Washington D.C.), Camden Yards (Baltimore), Citizens Bank Park (Philadelphia), and Great American Ball Park (Cincinnati) all sit in the Mid-Atlantic and Midwest weather belt. They see meaningful weather variance from April through October but are less extreme than the Great Lakes parks.

Low Weather Impact (Outdoor)

Dodger Stadium, Oracle Park, Petco Park, and loanDepot Park play in Southern California and Florida markets where temperatures are generally mild and precipitation risk is low during the MLB season. These parks still warrant a compass check. San Francisco’s famous marine layer and bay winds make Oracle Park genuinely wind-sensitive, but they rarely have the postponement risk of northern parks.

MLB Weather Today FAQs

More CLEATZ MLB Tools

The MLB weather report works best when combined with the rest of the CLEATZ data suite. Use the weather dashboard alongside our Best Strikeout Props today tool to identify which starting pitchers have favorable wind and temperature conditions. Our NRFI Picks Today page factors in first-inning pitching matchups, checking whether that game also has wind blowing in, and adds another layer of confidence to a no-run-first-inning lean.