Connecticut is on track for a cooler and drier fall this year, according to the 2025 Old Farmer’s Almanac, released on July 11. The long-range forecast points to chilly temperatures, scattered showers, and vibrant foliage, especially across the Northeast.
Cooler air sweeping into Connecticut in September and October
The Northeast — which includes Connecticut — is expected to experience temperatures below seasonal norms throughout both September and October. According to the Almanac, the region will see an average of 59°F (15°C) in September, roughly 2 degrees Fahrenheit cooler than usual. By October, that average will drop to 46°F (7.8°C) — about 3 degrees below normal.
Rainfall will also trend below average, with 3.5 inches expected in September and 2.5 inches in October. These conditions suggest a crisper, less humid autumn atmosphere.
Foliage forecast: Peak color expected near October 11
The Almanac forecasts ideal conditions for fall foliage across New England, thanks to the combination of cooler air and limited rainfall. The peak of leaf color is predicted to occur around October 11, making early to mid-October the optimal window for leaf-peeping in Connecticut.
Norwalk, and particularly areas along the Metro North tracks near Merritt 7, offer an annual display of spectacular autumn color, as seen in October 2024, when peak foliage lit up the landscape.
A cooler turn after a record warm fall in 2024
In sharp contrast to last year, when Connecticut logged its fifth warmest fall on record, this season appears poised for a more traditional autumn chill. From September through November 2024, the state reached an average temperature of 54.6°F (12.6°C) — nearly 4°F above average.
A centuries-old method meets modern science
The Old Farmer’s Almanac bases its long-range forecasts on a proprietary formula established by founder Robert B. Thomas in 1792, incorporating sunspot activity, meteorological trends, and climatological data. Though rooted in tradition, the almanac now integrates modern forecasting science with its historical methodology.
“The Old Farmer’s Almanac has predicted the weather since our founding in 1792 — when George Washington was president and actively farming at Mount Vernon,” the Almanac’s website notes.
For Connecticut, that heritage brings a forecast that suggests sweater weather is arriving on time — and with the promise of striking seasonal color across the state’s hills, trails, and town greens.
