Connecticut lies at the rough transition zone between the southern end of the humid continental climate, and the northern portion of the humid subtropical climate.
Northern Connecticut generally experiences a climate with cold winters with moderate snowfall and hot, humid summers.
Far southern and coastal Connecticut has a climate with cool winters with a mix of rain and infrequent snow, and the long hot and humid summers typical of the middle and lower East Coast.

Connecticut sees a fairly even precipitation pattern with rainfall/snowfall spread throughout the 12 months.
Connecticut averages 56% of possible sunshine (higher than the U.S. national average), averaging 2,400 hours of sunshine annually.

Early spring (April) can range from slightly cool (40s to low 50s F) to warm (65 to 70 F), while mid and late spring (late April/May) is warm.
By late May, the building Bermuda High creates a southerly flow of warm and humid tropical air, bringing hot weather conditions throughout the state, with average highs in New London of 81 °F (27 °C) and 85 °F (29 °C) in Windsor Locks at the peak of summer in late July.
On occasion, heat waves with highs from 90 to 100 °F (38 °C) occur across Connecticut.
Although summers are sunny in Connecticut, quick moving summer thunderstorms can bring brief downpours with thunder and lightning.
Occasionally these thunderstorms can be severe, and the state usually averages one tornado per year.
During hurricane season, the remains of tropical cyclones occasionally affect the region, though a direct hit is rare.

Weather commonly associated with the fall season typically begins in October and lasts to the first days of December.
Daily high temperatures in October and November range from the 50s to 60s (Fahrenheit) with nights in the 40s and upper 30s.
Colorful foliage begins across northern parts of the state in early October and moves south and east reaching southeast Connecticut by early November.
Far southern and coastal areas, however, have more oak and hickory trees (and fewer maples) and are often less colorful than areas to the north.
By December daytime highs are in the 40s ºF for much of the state, and average overnight lows are below freezing.

Winters (December through mid-March) are generally cold from south to north in Connecticut.
The coldest month (January) has average high temperatures ranging from 38 °F (3 °C) in the coastal lowlands to 33 °F (1 °C) in the inland and northern portions on the state.
The average yearly snowfall ranges from about 60 inches (1,500 mm) in the higher elevations of the northern portion of the state to only 20–25 inches (510–640 mm) along the southeast coast of Connecticut (Branford to Groton).
Generally, any locale north or west of Interstate 84 receives the most snow, during a storm, and throughout the season.
Most of Connecticut has less than 60 days of snow cover.
Snow usually falls from late November to late March in the northern part of the state, and from early December to mid-March in the southern and coastal parts of the state.

Connecticut's record high temperature is 106 °F (41 °C) which occurred in Danbury on July 15, 1995; the record low is −32 °F (−36 °C) which occurred in the Northwest Hills Falls Village on February 16, 1943, and Coventry on January 22, 1961.
Connecticut lies at the rough transition zone between the southern end of the humid continental climate, and the northern portion of the humid subtropical climate. Northern Connecticut generally experiences a climate with cold winters with moderate snowfall and hot, humid summers. Far southern and coastal Connecticut has a climate with cool winters with a mix of rain and infrequent snow, and the long hot and humid summers typical of the middle and lower East Coast.
Connecticut sees a fairly even precipitation pattern with rainfall/snowfall spread throughout the 12 months. Connecticut averages 56% of possible sunshine (higher than the U.S. national average), averaging 2,400 hours of sunshine annually.
Early spring (April) can range from slightly cool (40s to low 50s F) to warm (65 to 70 F), while mid and late spring (late April/May) is warm. By late May, the building Bermuda High creates a southerly flow of warm and humid tropical air, bringing hot weather conditions throughout the state, with average highs in New London of 81 °F (27 °C) and 85 °F (29 °C) in Windsor Locks at the peak of summer in late July. On occasion, heat waves with highs from 90 to 100 °F (38 °C) occur across Connecticut. Although summers are sunny in Connecticut, quick moving summer thunderstorms can bring brief downpours with thunder and lightning. Occasionally these thunderstorms can be severe, and the state usually averages one tornado per year. During hurricane season, the remains of tropical cyclones occasionally affect the region, though a direct hit is rare.
Weather commonly associated with the fall season typically begins in October and lasts to the first days of December. Daily high temperatures in October and November range from the 50s to 60s (Fahrenheit) with nights in the 40s and upper 30s. Colorful foliage begins across northern parts of the state in early October and moves south and east reaching southeast Connecticut by early November. Far southern and coastal areas, however, have more oak and hickory trees (and fewer maples) and are often less colorful than areas to the north. By December daytime highs are in the 40s ºF for much of the state, and average overnight lows are below freezing.
Winters (December through mid-March) are generally cold from south to north in Connecticut. The coldest month (January) has average high temperatures ranging from 38 °F (3 °C) in the coastal lowlands to 33 °F (1 °C) in the inland and northern portions on the state. The average yearly snowfall ranges from about 60 inches (1,500 mm) in the higher elevations of the northern portion of the state to only 20–25 inches (510–640 mm) along the southeast coast of Connecticut (Branford to Groton). Generally, any locale north or west of Interstate 84 receives the most snow, during a storm, and throughout the season. Most of Connecticut has less than 60 days of snow cover. Snow usually falls from late November to late March in the northern part of the state, and from early December to mid-March in the southern and coastal parts of the state.
Connecticut's record high temperature is 106 °F (41 °C) which occurred in Danbury on July 15, 1995; the record low is −32 °F (−36 °C) which occurred in the Northwest Hills Falls Village on February 16, 1943, and Coventry on January 22, 1961.
Connecticut