MLB Weather Report — September 18, 2026
Friday’s forecast is mostly clear. Seattle–Colorado is the only game with notable rain or delay concerns.
ROYALS @ PIRATES
Partly cloudy and 75 degrees at first pitch, with humidity near 78 percent. No rain is expected. Winds around 7 mph will move across the field before turning slightly OUT during the middle innings.
CUBS @ REDS
Partly cloudy and 80 degrees with humidity near 75 percent. The rain chance is approximately 6 percent. Winds will blow from left to right at around 10 mph.
BREWERS @ ORIOLES
Partly cloudy and 78 degrees with humidity near 51 percent. There is a 2 percent chance of rain. Winds around 9 mph will blow IN.
RED SOX @ RAYS
This game will be played indoors at a domed stadium. Weather will not be a factor.
ATHLETICS @ GUARDIANS
Partly cloudy and 69 degrees with humidity around 60 percent. The rain chance is approximately 1 percent. Winds will begin near 11 mph IN before shifting into more of a right-to-left crosswind.
PHILLIES @ METS
Partly cloudy and 77 degrees with humidity near 50 percent. No rain is expected. Winds will blow IN around 9 mph and could increase to approximately 12 mph later in the game.
TIGERS @ WHITE SOX
Partly cloudy and 69 degrees with humidity around 79 percent. The rain chance is approximately 4 percent. Winds near 10 mph will move from left to right before turning slightly IN later.
BLUE JAYS @ RANGERS
This game will be played indoors at Globe Life Field. Weather will not be a factor.
MARINERS @ ROCKIES
Temperatures will be around 72 degrees with humidity near 66 percent. The rain probability is approximately 50 percent around first pitch before decreasing later in the evening. Winds will begin around 9 mph OUT before weakening and shifting across the field. A delay is possible, but a postponement is not currently expected.
BRAVES @ ASTROS
This game will be played indoors at Daikin Park. Weather will not be a factor.
NATIONALS @ CARDINALS
Hot and partly cloudy with a first-pitch temperature near 87 degrees and humidity around 42 percent. The rain chance is approximately 11 percent. Winds will be light at 5 mph IN before shifting across the field.
TWINS @ ANGELS
Clear and 75 degrees with humidity near 67 percent. No rain is expected. Winds will blow OUT around 9 mph before gradually weakening.
MARLINS @ PADRES
Clear and 71 degrees with humidity around 77 percent. No rain is expected. Winds will move from left to right at approximately 11 mph before weakening later.
YANKEES @ DIAMONDBACKS
This game will be played indoors at Chase Field. Weather will not be a factor.
GIANTS @ DODGERS
Clear and 71 degrees with humidity near 66 percent. No rain is expected. Winds will blow OUT around 7 mph before fading later in the game.
BOTTOM LINE
Seattle–Colorado is the only matchup that requires another weather check closer to first pitch. No postponements are currently expected.