Metro Boston, North Shore and Metro West: This past week certainly got many of us thinking about Fall with crisp cool mornings, mild afternoons and back to cool temperatures overnight. With many of the local school districts opening their doors this week and welcoming back students for the new school year it is another reason to realize that September is just around the corner. But, Mother Nature is not ready to relinquish Summer just yet as this week brings a return to Summer warmth and humidity which has been lacking here for most of the month of August.
In case your wondering it has been a cooler than normal August with temperatures in Boston running near 2.5 degrees below normal. In fact, we have not reached 90 this month with the highest temperature 85 degrees way back on the 8th. We have only eclipsed 80 degrees once in the past 12 days in Boston. With an average high temperature of around 79 degrees for late August it appears temperatures jump to above normal for a change this week, perhaps as much as 8 to 10 degrees higher than normal Wednesday.
It has been warm throughout portions of the Midwest and central Plains the last several days but that warmth has been unable to reach into the Northeast since the Jet Stream has slid south of our region. This has kept us in the cool pattern of late. With high pressure overhead the weather looks great through Tuesday with plenty of sunshine along with those warmer temperatures.
High temperatures Monday and Tuesday should be in the upper 70s to mid 80s, coolest right along the coast as the persistent onshore breeze keeps it cooler on the beaches. Fair skies with lows Monday and Tuesday night in the low to mid 60s.
On Wednesday humidity increases and this should be the warmest day of the week with temperatures well into the 80s across the region. It is possible a few communities touch 90 and with the higher humidity it will be uncomfortable for many, especially since we have had such a long dose of cooler temperatures and low humidity. During Wednesday a cold front will be approaching and this will bring an increase in clouds for the afternoon with the potential for showers and thunderstorms late day and into Wednesday evening. Lows in the mid to upper 60s Wednesday night.
Once the cold front passes through the area and moves offshore early on Thursday expect the lower humidity and cooler temperatures to return. But, Thursday should see highs return into the low to mid 80s, before cooling to the mid 70s to around 80 on Friday. Generally partly cloudy skies both days.
The tropics have been uncharacteristically quiet this Summer but there is a feature that bears watching this week as this system tracks just east of the Bahamas Tuesday. Tropical Storm Cristobal is expected to curve out to sea later this week and move well southeast of New England late in the week.
North Shore beach outlook:
Monday: A great beach day if you can make it. Sunshine and pleasant. High temperatures in the upper 70s to 80 degrees. Light variable winds turning onshore in the afternoon. Water temperatures in the upper 60s. High tide just after midday. UV Index will be high. Surf 1 to 3 feet.