D.C. area forecast: Sunday stays pleasant; turning unsettled into the work week

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 1 to 10.

Not terrible by any means, but more clouds, more humidity, and the slightest threat of a shower slightly diminish the weekend outlook.

Express Forecast

Today: Increasing clouds, Isolated PM storm. Highs: Mid-to-upper 80s.

Tonight: Partly-to-mostly cloudy. Lows: 62 to near 70.

Tomorrow: Mostly cloudy, widespread PM showers/storms. Highs: Mid-to-upper 80s.


Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Our latest stretch of beauty begins to come to an end today as warmer temperatures and higher humidity work back into the Mid-Atlantic.  Still, most of us stay dry, and readings in the 80s in August earn my approval every time.  After only slight chances today, rain chances rise higher through midweek as weak waves of low pressure ride along a stalled out front nearby.  Not a repeat of last week’s deluge by any means, but some areas that get in on the most action could see a healthy boost to their running rainfall totals by the second half of the week.

Today (Sunday): Still pleasant, for the most part, but you’ll notice rising humidity levels and a few more clouds overhead as southwest winds ahead of the front pull moisture into the area.  Low-level moisture is on the rise, but I think that the mid-levels remain dry enough that any storms that pop up die as they work out of the mountains, but still, can’t rule out 1 or 2 hanging together (20% chance).  Skies start out partly sunny and trend cloudier through the day and highs reach the mid-to-upper 80s. Confidence: High

Tonight: Skies are partly-to-mostly cloudy overnight, and we still can’t rule out a shower here and there, though they’ll be isolated at best.  Winds trend toward calm overnight and temperatures range from the lower 60s in the suburbs, closer to 70 downtown. Confidence: High

When does the next round of rain move in? Keep reading for the forecast through the midweek…

Tomorrow (Monday): An area of low pressure approaches on Monday, eventually raising our rain chances.  Much of the work day should be dry though with partly sunny skies.  By the late afternoon, and especially into the evening, there is a good chance that our radar lights up with showers and storms approaching from the west.  With abundant moisture to work with, storms should bring periods of heavy rain to some, but widespread severe or flooding is not expected.  Daytime highs reach the mid-to-upper 80s. Confidence: Medium-High

Tomorrow night: The showers, storms, and heavy rain chances (80%) remain as the low moves by overnight.  Skies stay mostly cloudy, and overnight lows are warm, in the upper 60s/lower 70s, with some areas of fog likely. Confidence: Medium-High


Showers and storms are possible through the day on Tuesday, though they should be most prevalent and heaviest late in the day.  The air mass itself stays warm and juicy, with clouds and any showers holding daytime highs in the mid-80s or so.  Overnight, a bit of a break in the action is likely, with rain chances dropping to around 30%.  Skies are mostly cloudy, with lows in the upper 60s/low 70s and a few areas of fog possible. Confidence: Medium

Our forecast remains unsettled into Wednesday as well, though the chances and the intensity of the showers/storms are on the decline.  Skies remain on the mostly cloudy side, but expect only a few scattered storms during the afternoon/evening hours, with daily highs reaching the upper 80s. Confidence: Medium

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Brian Jackson · August 17, 2014

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