Capital Weather Gang's NatCast for today has 'It's a warm and muggy one at the ballpark. Scattered showers and storms are likely across the D.C. area. Not a sure bet they'll soak the stadium, but definitely have the rain gear handy' with low 80's at first pitch, mid-80's by ninth inning, 70% chance of rain.
Translation: Expect larger-than-usual proportion of Cardinals supporters in the stands while weather-wussy locals sit this one out.