Connecticut Finishes September Warm; Cooler Weather Arrives Tuesday

Connecticut residents are squeezing out a few more days of summer as September winds down. Temperatures have run noticeably warmer than average across the state.

From the shoreline towns of New Haven and Norwalk to inland spots like Hartford and Manchester, a lingering summer-like air mass has kept things toasty. But forecasters are already warning: this stretch of warmth won’t last much longer.

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Warm Weather Continues Into Early Week

Monday’s forecast calls for highs in the upper 70s. Some neighborhoods might even flirt with 80 degrees.

That’s a decent jump from the usual late September average of about 70 degrees in Connecticut. The warm spell comes from a stubborn air mass that’s parked itself over New England for days, making it feel more like mid-August than early fall.

Humidity Eases for a More Comfortable Day

Even though it’ll be warm, folks from Stamford to Waterbury will get a break from the humidity on Monday. Lower moisture means relief after several muggy days.

It’s a good excuse to head outside—maybe stroll the Farmington Canal Heritage Trail or hit the beach in Milford. Feels like summer’s giving us a little bonus.

Tuesday Brings Another Dose of Sunshine

Tuesday looks a lot like Monday: sunny and warm. Inland areas like Danbury and Torrington could nudge 80 again.

Shoreline towns will run a bit cooler, thanks to breezes off Long Island Sound. Still, it’s perfect for one last warm-weather hike or picnic before the season flips.

Regional Breakdown of High Temperatures

Forecasts differ slightly by region. Here’s what to expect:

Shoreline towns (New Haven, Norwalk, Milford): 73–78°F
Inland cities (Hartford, Manchester, Waterbury): 75–80°F
Litchfield Hills (Torrington, New Milford): 74–78°F

Cool Canadian Air Mass on the Horizon

After Tuesday, a cooler, drier Canadian air mass will push south into New England. By Wednesday, highs will fall into the 60s—right where they should be for late September and early October.

Residents from Bridgeport to Willimantic can look forward to crisp mornings and mild afternoons. Sunshine sticks around, but the air will feel a lot more like autumn.

Classic Autumn Conditions Arrive

Cooler temperatures and low humidity will create perfect conditions for fall foliage. Whether you’re driving through Litchfield County’s hills or walking along the Connecticut River in Essex, the autumn atmosphere should be in full swing.

Expect cool air, bright skies, and those classic vibrant colors—finally.

Preparing for the Seasonal Change

With the warm stretch about to end, it’s probably time to get ready for cooler days. Temperatures across the state should stick in the 60s through the rest of the week.

Evening lows might dip into the 40s in some inland areas. Here’s what you might want to do:

Grab warmer layers for evenings out
Check your home heating system before the first frost sneaks up
Plan some fall activities to make the most of the crisp weather

Why This Warm Spell Stands Out

Late-season warmth isn’t unheard of, but this stretch has lasted longer than usual. By late September, places like Middletown and Groton normally see highs closer to 70 degrees.

Weather patterns have kept cooler air locked up north, letting summer-like conditions linger right up to fall’s doorstep. It’s a little odd—but hey, no one’s complaining about a few extra days of sun.

Looking Ahead

Forecasters say October might finally bring those classic swings in temperature. Warm and cool fronts seem likely to shuffle through the region.

Right now, folks all across Connecticut—from Hartford’s busy streets to Old Saybrook’s peaceful coves—get one last day to soak up the warmth. After that, brisk autumn air moves in and probably won’t let go for a while.

Here is the source article for this story: Connecticut will be finishing up September on a warm note. Here’s when cooler weather arrives.

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