Metro Boston, North Shore and Metro West: June is here and so are the longer days as we approach the longest days of the year later this month. It is a month that begins with an average high temperature of 70 degrees in Boston and an average low of 52. By the end of the month those averages will climb to 80 and 64 respectively.
The recent cool weather, especially along the coast, has made for a cooler than normal period during the final week of May. Overall in May the temperatures were just about normal with precipitation near three quarters of an inch below average with 2.86 inches of rainfall. For you gardeners the cool and damp weather of late was a concern if you planted your tender annuals and warm weather vegetable plants Memorial Day Weekend. The good news is that we are in for a touch of milder weather over the next several days which will help to dry out and warm up the soil for those tender plants.
A quick recap of May shows the highest temperature for the month in Boston was 85 degrees on the 12th, lowest temperature of 43 on the 29th. The high temperature in Boston on the 28th was only 50 degrees which is more representative of our normal overnight low and was near 20 degrees below normal for the average high in late May. As mentioned above the rainfall was below normal.
The persistent ocean breeze over the past two weeks continued on Saturday making it rather cool along the immediate coast as temperatures remained in the 60s. Inland, highs were in the low to mid 70s. This trend continues on Sunday, although temperatures should trend a few degrees higher from those of Saturday, but the idea is the coast stays cooler than average with temperatures climbing into the 70s away from the shore. Plenty of sunshine, thanks to friendly high pressure, will make for a real nice day to be outdoors enjoying your favorite activity.
Another pleasant night follows on Sunday night. It will not be as cool as recent nights as winds begin to swing around to the south and southwest. The mercury should only dip into the upper 40s to low 50s under fair skies.
The work week brings a touch of Summer to the area as the southwest wind takes a firm hold as high pressure settles to our south. Sunshine and temperatures well into the 70s to low 80s on Monday should make many of us forget the recent dismal weather during portions of last week. It is possible a few locations well inland nudge the mid 80s. Meanwhile, a warm front will get hung up to our west. This will throw clouds into the area Monday night and Tuesday but skies should generally remain partly cloudy through Tuesday. Lows in the mid to upper 50s Monday night. Highs on Tuesday well into the 70s, perhaps a few locations seeing the low 80s across the interior.
It gets a bit more complicated thereafter. A frontal boundary approaches Tuesday night into Wednesday. With that comes the threat of showers during that time and beyond. Lows in the upper 50s Tuesday night, then not as mild but remaining near seasonable with highs in the upper 60s to 70 degrees on Wednesday.
The long range outlook suggests more showers are possible Thursday before we return to a drier period Friday and Saturday. Temperatures near seasonable with highs in the upper 60s to low 70s and lows mainly in the 50s.