Today’s Daily Digit

A somewhat subjective rating of the days weather, on a scale of 1 to 10.

5
Enjoy today’s “acceptable” heat+humidity level. It only gets worse from here!

Express Forecast

Today: Partly to mostly sunny, humid. Upper 80s to low 90s.

Tonight: Mainly clear. Low-to-mid 70s.

Tomorrow: Partly to mostly sunny, humid. 20% chance of p.m. storm. Low-to-mid 90s.

FORECAST IN DETAIL

Here it comes. The heat is building in and about to set up camp. While not completely ruling out a passing shower or storm the next few days, mind you, the reduced chances do help us dry out for a bit. But once the the heat index makes a run at triple digits midweek, you might be wishing for a cooling thunderstorm to come your way. In the meantime, don’t forget to break out that sunscreen if you’re headed out to enjoy today’s increased sunshine!

Temperature Map

Temperatures: Latest D.C. area temperature map. See interactive map on our Weather Wall.

Today (Sunday): Once again we welcome the return of our seasonal favorite, the Bermuda High. Upper-level high pressure building in from the greater Bermuda area of the Atlantic Ocean means more sun, more heat and more humidity. After some possible early-to-mid morning fog, partly to mostly sunny skies should easily lift highs to the upper 80s to low 90s. Fleeting breezes near 10 mph from the south offer little relief from the moderate to high humidity. Odds of an afternoon thundershower are low – less than 20%. Confidence: Medium-High

Tonight: Just a slight chance for an isolated evening thundershower. Otherwise, this might actually be the clearest night we see for a while. Lows drop mainly to the low-to-mid 70s under mainly clear skies. You can thank light breezes from the south for increasing the humidity a bit more. Confidence: Medium-High

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Monday): Light winds from the west give us a slight downsloping effect, whereby air sinks on our (east) side of the Appalachians, and this compressing air helps heat us a few extra degrees. By afternoon, most of us should reach highs in the low-to-mid 90s under partly to mostly sunny skies. Expect to sweat with continued moderate to high humidity. The threat of an afternoon or evening thunderstorm ticks upward to 20%. Confidence: Medium

Tomorrow night: After a 20% chance of an evening thunderstorm, skies should remain somewhat cloudy, and haze may stick around overnight with so much water vapor in the air. Lows range through the 70s, possibly as warm as the upper 70s for some places inside the Beltway. Confidence: Medium

A LOOK AHEAD

Tuesday and Wednesday is when the heat bubble over us intensifies. Highs likely head for the mid-90s with hazy skies above, and with plenty of humidity the heat index could easily top out near 100. We’ll keep a 20% chance of a shower or thunderstorm in the forecast given the muggy and somewhat unstable air. Tuesday night lows end up in the 70s once gain. Confidence: Medium