Climateby Month

Stamford, CT climate by month

NOAA 1991-2020 normals · 16 ft elevation

Summers in Stamford are warm and often humid; winters are cold and snowy. Highs peak at 83°F in July and fall to 37°F in January. Wet days are spread through the year, from about 9 to 12 a month. Normal snowfall is about 34 in a year. The most comfortable time to visit is May.

Warmest month
83°F
July normal high
Coldest month
22°F
January normal low
Wet days a year
124
47.8 in of precipitation
Snow a year
33.6 in
normal snowfall

How warm is Stamford?

Normal highs range from 37°F in January to 83°F in July.

20°40°60°80°100° January: normal high 37°F (3°C), low 22°F (-6°C) 37° 22° February: normal high 40°F (4°C), low 24°F (-4°C) March: normal high 48°F (9°C), low 31°F (-1°C) April: normal high 59°F (15°C), low 40°F (4°C) May: normal high 69°F (21°C), low 50°F (10°C) June: normal high 78°F (26°C), low 59°F (15°C) July: normal high 83°F (28°C), low 65°F (18°C) 83° 65° August: normal high 81°F (27°C), low 64°F (18°C) September: normal high 74°F (23°C), low 57°F (14°C) October: normal high 63°F (17°C), low 46°F (8°C) November: normal high 52°F (11°C), low 36°F (2°C) December: normal high 42°F (6°C), low 28°F (-2°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Stamford?

May has the most wet days (about 12); the year brings about 48 in of precipitation.

January: 10 wet days February: 9 wet days 9 March: 11 wet days April: 11 wet days May: 12 wet days 12 June: 11 wet days July: 10 wet days August: 11 wet days September: 10 wet days October: 10 wet days November: 10 wet days December: 11 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 33.6 in a year, most of it in February.

January: 8.5 in of snow February: 10.7 in of snow 10.7 March: 7.0 in of snow April: 0.9 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.1 in of snow November: 0.9 in of snow December: 5.5 in of snow JFMAMJJASOND

How humid is Stamford?

Muggy days peak in July, at about 14 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 5 muggy days July: 14 muggy days 14 August: 12 muggy days September: 5 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Westchester County Airport, 8.7 mi W of the city center.

How much daylight?

Daylight ranges from about 9.3 hours in December to 15.1 hours in June.

January: 9.6 hours of daylight February: 10.7 hours of daylight March: 12.0 hours of daylight April: 13.3 hours of daylight May: 14.5 hours of daylight June: 15.1 hours of daylight 15.1 July: 14.8 hours of daylight August: 13.8 hours of daylight September: 12.5 hours of daylight October: 11.1 hours of daylight November: 9.9 hours of daylight December: 9.3 hours of daylight 9.3 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Stamford, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 37°F22°F 3.2 in10 8.5 in 0 9.6 h
February 40°F24°F 2.5 in9 10.7 in 0 10.7 h
March 48°F31°F 4.1 in11 7.0 in 0 12.0 h
April 59°F40°F 4.2 in11 0.9 in 0 13.3 h
May 69°F50°F 3.9 in12 0.0 in 0 14.5 h
June 78°F59°F 4.3 in11 0.0 in 5 15.1 h
July 83°F65°F 4.1 in10 0.0 in 14 14.8 h
August 81°F64°F 4.4 in11 0.0 in 12 13.8 h
September 74°F57°F 4.9 in10 0.0 in 5 12.5 h
October 63°F46°F 4.3 in10 0.1 in 1 11.1 h
November 52°F36°F 3.6 in10 0.9 in 0 9.9 h
December 42°F28°F 4.2 in11 5.5 in 0 9.3 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Stamford

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 290620
Feb 340515
Mar 44278
Apr 59771
May 731670
Jun 691272
Jul 57475
Aug 59772
Sep 691561
Oct 601160
Nov 44363
Dec 310714

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Stamford

The last spring frost typically comes around Apr 12, and the first fall frost around Oct 31, leaving 200 frost-free days in a typical year.

Frost and freeze dates for Stamford
Typical date1 year in 10
Last spring frost (32°F)Apr 12after Apr 27
First fall frost (32°F)Oct 31before Oct 15
Last hard freeze (28°F)Apr 1after Apr 13
First hard freeze (28°F)Nov 13before Oct 29
Frost-free season200 daysunder 179 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Westchester Co Airport (USW00094745), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Connecticut.

Hottest and coldest readings, 1991-2020

The highest reading was 102°F (July 6, 2010); the lowest was -9°F (January 27, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Stamford

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, frost dates and humidity and wind by hour: Westchester Co Airport (USW00094745), 8.8 mi W of the city center, 379 ft (363 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Bridgeport Sikorsky Mem Airport (USW00094702), 23 mi ENE of the city center, 5 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Teterboro Airport (USW00094741), 31 mi WSW of the city center, 9 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Westchester County Airport (725037-94745), 8.7 mi W of the city center, 370 ft (354 ft higher than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error