The weak low pressure system responsible for the cloud cover in the greater Springfield area during Sunday pulls away tonight. High pressure establishes itself over the region Monday and will be with us through most of the week ahead. A significantly warmer air mass brings back heat and humidity Tuesday through Thursday. A cold front approaches late Thursday and Thursday night, passing through our area by early Friday. This may trigger a few showers at that time. Seasonal temperatures and lower humidity follows to end the work week.
Details: Monday will see a return to mostly sunny skies although some afternoon patchy clouds can be expected. Temperatures warming into the low 80s for the afternoon. Light west winds about 10 mph or less. A few clouds overnight, lows falling back into the mid and upper 50s.
The heat and moderately increasing humidity return in earnest beginning on Tuesday. With high pressure established to our south and much warmer air moving in from our west the heat will be on as high temperatures climb well into the 80s, perhaps touching 90 in a few locations. There will be plenty of sunshine throughout the day. Fair skies and a somewhat muggy night follows. Lows in the mid 60s. Light west winds.
More of the same on Wednesday as temperatures climb to near 90 under a mostly sunny sky. Overnight lows in the mid to upper 60s. Meanwhile it is becoming increasingly more humid to add to the discomfort.
Thursday begins sunny with skies becoming partly cloudy in the afternoon, followed by mostly cloudy overnight. There is a chance of an isolated shower late in the afternoon or in the evening as the cold front approaches and moves across the Pioneer Valley at night. Highs in the mid to upper 80s. Lows in the mid 60s.
Friday, becoming partly sunny, seasonally normal temperatures and falling humidity. Highs in the low 80s.