Burlington, Connecticut climate: Climate normals at a NOAA weather station

What is the weather like at Burlington each month?

July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 17°F. The most precipitation falls in October (5.66 in), the least in February (3.36 in).

Which months are mildest at Burlington?

Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (9).

That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.

When is the last frost at Burlington?

In Burlington, the last spring frost (32°F) comes after April 25 in half of years and after May 10 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 4 in one year in ten.

Last spring frost, half of years after

April 251 year in 10 after May 10; 9 in 10 after April 12

First autumn frost, half of years before

October 181 year in 10 before October 4; 9 in 10 before November 1

NOAA puts the median frost-free season at 172 days, and the season without a hard freeze (28°F) at 197 days.

A hard freeze (28°F) comes after April 13 in half of springs and before October 30 in half of autumns.

The USDA's 2023 Plant Hardiness Zone Map puts Burlington in zone 6a in ZIP code 06013, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6b: the coldest night of a typical year reaches −5°F (21 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.

Frost dates for every NOAA station in Connecticut · Frost dates by ZIP code

How hot and how cold does it get at Burlington?

In a normal year in Burlington, 13 days a year reach 90°F, 142 nights fall to 32°F or colder and 123 days bring measurable precipitation.

Days at 90°F or more

13a normal year

Days at 100°F or more

fewer than 1a normal year

Nights at 32°F or colder

142a normal year

Days that stay below freezing

27high of 32°F or less

Days with 0.01 inch of precipitation

123a normal year

Days with 1 inch of snow or more

10a normal year

The highest temperature in this station's record (since 1961) is 101°F, on July 3, 2026; the lowest is −25°F, on February 14, 2016.

The wettest calendar year on that record is 2011, with 79.01 in; the snowiest season is 2010–11, with 83.5 inches.

How sunny is it at Burlington?

Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds at Burlington, 3.9 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (67%).

How many heating and cooling degree days does Burlington record?

A normal year at Burlington brings 6,107 heating degree days, 14% more than the median U.S. place (5,373), and 686 cooling degree days, 24% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,830 growing degree days a year above 50°F.

Have recent years at Burlington been warmer than normal?

2025 averaged 51.0°F, 1.0°F above the 1991-2020 normal of 50.0°F. 3 of the 3 complete years since 2022 ran warmer than the normal.

Over 41 complete years from 1963 to 2025, the station's annual mean temperature rose at a fitted 5.2°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.

Which places near Burlington share this climate record?

10 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.

• New Britain, CTalso near: Meriden (12 mi, 50.7°F a year); Bakersville (16 mi, 47.3°F a year)75,871 people · 11 mi SE
• West Hartford, CTalso near: Hartford (12 mi, 51.0°F a year); Bakersville (14 mi, 47.3°F a year)64,184 people · 9 mi E
• Bristol, CTalso near: Bakersville (12 mi, 47.3°F a year); Meriden (13 mi, 50.7°F a year)62,195 people · 8 mi S
• Newington, CT31,692 people · 13 mi SE
• Wethersfield, CT27,372 people · 15 mi SE
• Terryville, CT5,112 people · 9 mi SW
• Collinsville, CT4,001 people · 2 mi N
• Weatogue, CT2,851 people · 6 mi NE
• Thomaston, CT7,566 people · 11 mi SW
• Canton Valley, CT1,364 people · 3 mi NE

Nearby and next

• Connecticut climateThe statewide normals and every place in the state
• Bakersville, CT5 miles from this station, 47.3°F a year
• Barkhamsted, CT9 miles from this station, 48.5°F a year
• Hartford, CT16 miles from this station, 51.0°F a year
• Norfolk, CT19 miles from this station, 45.9°F a year
• Compare two placesMonth by month, side by side

Download these normals (CSV) · JSON · How these figures are made