Kevin Shaw

Wednesday was a cloudy, cooler, wet day with just a little bit of lightning and distant thunder during the first hour of the observation day between 0000-0100. Most of the day we had cool, stratiform rain (0.72″ […]

Tuesday was a partly cloudy, warmer, more humid day with serious cloud buildups by late afternoon (see featured image for this post) that developed quickly into soaking thundershowers from about 1730 to 1930 […]

Labor Day Monday was a mostly sunny, warmer, increasingly more humid day (esp late) but with no rain. The high temperature for the day reached the upper 70s (a bit cooler than the low 80s as forecasted yesterday), […]

Sunday was a mostly sunny, milder day with a bit of brief light rain/occasional drizzle sometime overnight (0.02″). The high temperature for the day reached the mid 70s, with upper 50s in the early AM, dew points […]

Saturday was cloudy, rainy (0.81″) and cool, courtesy of the visit of weakening remnants of Harvey. The high temperature for the day barely reached the 60° mark, with upper 50s temps predominating most of the day […]

Friday started the month of September with mostly cooler, drier, and partly cloudy conditions most of the day, then cloudy in the evening, ahead of our next rain system (Harvey remnants) on Saturday. It was dry […]

Thursday wrapped up the month of August in a bit more typical summertime fashion. It was my first 80°+ max temp in 8 days, going back to the 23rd when I hit 81.7°. It was dry most of the day, until light showers ( […]

Wednesday changed back to the pattern that had ended on Monday as warmer temperatures, partly cloudy skies, and dry conditions returned. The high temperature for the day reached the mid 70s with dew points […]

Tuesday was a really nice change, with delightfully cool, wet conditions most of the day. The high temperature for the day of 66.0° was the coolest of the summer, “surpassing” the max of 66.9° on June 7 and the c […]

Monday once again featured partly cloudy skies and pleasant air and dew point temperatures. High temperatures reached the mid 70s, with dew points in the lower 60s to mid 50s. Now at 0630 we have cloudy, rainy […]

Sunday once again featured partly cloudy skies and pleasant air and dew point temperatures. High temperatures reached the mid 70s, with dew points in the lower 60s to mid 50s. Now at 0433 we have fair skies with […]

Saturday featured partly cloudy skies, pleasant temperatures, both air and dew point. High temperatures only reached the mid-upper 70s, with dew points in the lower 60s and upper 50s. Now at 0644 we have fair […]

Friday featured partly to mostly cloudy skies, even cooler temperatures, with light rain to start the day in the very early AM from just after midnight to about 0230 (0.11″) . High temperatures only reached the […]

Thursday featured partly to mostly cloudy skies, cooler temperatures and pleasant dew point temperatures. High temperatures only reached the upper 70s, with dew points in the lower 60s and upper 50s. Now at 0452 […]

Rockville 2.8 Maryland Climate Data and Summary July 2017 (PDF)

Wednesday featured a bit of clouds early and a very light shower/sprinkle (T) that gave way to slowly improving conditions as this day progressed. High temperatures only reached the low 80s, with dew points […]

CLIMATE STATISTICS FOR JULY 2017

Average high temperature 87.3°
Average low temperature 70.9°
Mean temperature 79.1°

Precipitation 8.65″
Greatest daily amount(date) 2.92″ (28)
Snow 0.0″
Year to date pr […]

Tuesday was partly sunny, hot and quite humid with dew point temperatures approaching the very uncomfortable 80° mark. Showers and storms threatened later in the day at times, but never reached my station. […]