Stamford, Connecticut climate: Normal weather by month, frost dates and records

What is the weather like in Stamford each month?

July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 22°F. The most precipitation falls in September (5.21 in), the least in February (3.14 in).

Each month has its own page with the day-by-day normals, the month's records and its recent years:

• Jan
• Feb
• Mar
• Apr
• May
• Jun
• Jul
• Aug
• Sep
• Oct
• Nov
• Dec

When is the best weather to visit Stamford?

Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August 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 in Stamford?

In Stamford, the last spring frost (32°F) comes after April 17 in half of years and after May 2 in one year in ten; the first autumn frost comes before October 23 in half of years and before October 8 in one year in ten.

Last spring frost, half of years after

April 171 year in 10 after May 2; 9 in 10 after April 3

First autumn frost, half of years before

October 231 year in 10 before October 8; 9 in 10 before November 6

NOAA puts the median frost-free season at 188 days, and the season without a hard freeze (28°F) at 212 days.

A hard freeze (28°F) comes after April 3 in half of springs and before November 2 in half of autumns.

The USDA's 2023 Plant Hardiness Zone Map puts Stamford in zone 7a across its 6 ZIP code areas (7a in 06903, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Stamford's NOAA station is in zone 6b: the coldest night of a typical year reaches −1°F (20 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

What hardiness zone is each Stamford ZIP code in?

The USDA's 2023 map gives each ZIP code area one zone. Stamford's 6 ZIP code areas are all in zone 7a. Each ZIP's frost dates are in the frost tool.

How hot and how cold does it get in Stamford?

In a normal year in Stamford, 18 days a year reach 90°F, 119 nights fall to 32°F or colder and 124 days bring measurable precipitation.

Days at 90°F or more

18a normal year

Days at 100°F or more

fewer than 1a normal year

Nights at 32°F or colder

119a normal year

Days that stay below freezing

16high of 32°F or less

Days with 0.01 inch of precipitation

124a normal year

Days with 1 inch of snow or more

10a normal year

The highest temperature in this station's record (since 1955) is 104°F, on August 9, 2001; the lowest is −18°F, on January 22, 1961.

The wettest calendar year on that record is 1983, with 72.08 in; the snowiest season is 1995–96, with 82.2 inches.

How sunny is Stamford?

Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Stamford, 3.9 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (65%). Among the 459 U.S. places of 50,000 or more, that ranks tied 385th (with 30 others) in sunshine.

How much heating and cooling does Stamford need?

A normal year in Stamford brings 5,358 heating degree days, 0% fewer than the median U.S. place (5,373), and 858 cooling degree days, 6% 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 3,227 growing degree days a year above 50°F.

Has Stamford been warmer than normal lately?

Over 114 complete years from 1892 to 2019, the station's annual mean temperature rose at a fitted 3.3°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.

Which places near Stamford share this climate record?

25 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.

• White Plains, NYalso near: Westchester County Airport (4 mi, 52.0°F a year); Dobbs Ferry (4 mi, 53.4°F a year)62,561 people · 13 mi SW
• Harrison, NY31,321 people · 11 mi SW
• Port Chester, NY30,957 people · 10 mi SW
• Glen Cove, NY28,088 people · 17 mi S
• Ossining, NY26,895 people · 17 mi W
• Mamaroneck, NY19,783 people · 16 mi SW
• Rye, NY16,463 people · 14 mi SW
• Mount Kisco, NY10,698 people · 11 mi NW
• Rye Brook, NY9,900 people · 10 mi SW
• Briarcliff Manor, NY7,440 people · 16 mi W
• Pleasantville, NY7,351 people · 12 mi W
• Bayville, NY6,739 people · 15 mi S
• Hawthorne, NY4,881 people · 13 mi W
• Thornwood, NY4,405 people · 12 mi W
• Armonk, NY4,382 people · 9 mi W
• Locust Valley, NY3,591 people · 17 mi S
• Chappaqua, NY3,040 people · 12 mi W
• Valhalla, NY2,978 people · 12 mi W
• Bedford Hills, NY2,283 people · 11 mi NW
• Bedford, NY2,118 people · 7 mi NW
• Katonah, NY2,016 people · 11 mi NW
• Lattingtown, NY1,875 people · 16 mi S
• Mill Neck, NY1,008 people · 17 mi S
• Scotts Corners, NY610 people · 4 mi N
• Centre Island, NY395 people · 16 mi S

Nearby and next

• Stamford in OctoberThis month day by day, its records and recent years
• Connecticut climateThe statewide normals and every place in the state
• Westchester County Airport, NY9 miles from this station, 52.0°F a year
• Yorktown Heights, NY16 miles from this station, 49.4°F a year
• Dobbs Ferry, NY17 miles from this station, 53.4°F a year
• Danbury, CT17 miles from this station, 49.6°F a year
• Compare two placesMonth by month, side by side

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