Stamford, CT weather in May
Stamford is mild in May, with frequent rain: highs average 69°F and nights drop to about 50°F. Rain falls on about 12 days.
- Normal high
- 69°F
- Normal low
- 50°F
- Wet days
- 12
- 3.9 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 65°F | 73°F |
| Normal low | 45°F | 54°F |
| Chance of a wet day | 39% | 39% |
| Sunrise / sunset | 5:51 am / 7:50 pm | 5:24 am / 8:19 pm |
| Daylight | 14.0 h | 14.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical May day
- 6 am54°Fdew point 47°F
- 9 am61°Fdew point 47°F
- Noon65°Fdew point 47°F
- 3 pm67°Fdew point 47°F
- 6 pm63°Fdew point 47°F
- 9 pm57°Fdew point 48°F
NOAA hourly normals (local standard time) from Westchester Co Airport (9 mi away); average wind 7 mph; clear or few clouds in 52% of daytime hours, mostly cloudy or overcast in 40%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F16 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph4 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow12 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 3.9 in; a dry May brings about 2.8 in and a wet one about 4.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How May varies from year to year
- Warmest May, 1991-20201991: average high 76°F
- Coolest May2017: average high 64°F
- Wettest May2019: 6.9 in
- Driest May2007: 1.2 in
- Highest reading95°F (May 20, 1996)
- Lowest reading32°F (May 9, 2020)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 59°F | 69°F | 78°F |
| Normal low | 40°F | 50°F | 59°F |
| Wet days | 11 | 12 | 11 |
| Comfortable days | 7 | 16 | 12 |
| Daylight | 13.3 h | 14.5 h | 15.1 h |
Highs change by +10°F from April and +9°F into June.
Nearby alternatives in May
- Warmer: Philadelphia, PA114 mi · high 74°F · 11 wet days
- Cooler: Nantucket, MA180 mi · high 61°F · 12 wet days
How Stamford ranks in May
- Normal high283rd warmest of 378 cities; 3rd of 5 in Connecticut
- Wet days280th driest of 378
- Comfortable days68th most of 339
What to pack for Stamford in May
- A rain jacket or umbrella – rain on about 12 days
Heating and cooling
May has 201 heating degree days and 30 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How cold is Stamford in May?
The normal high is 69°F and the normal low is 50°F. From 1991 to 2020 the coldest May reading was 32°F (most recently on May 9, 2020).
Does it rain a lot in Stamford in May?
About 12 days in May have at least 0.01 in of precipitation, and the normal total is 3.9 in. The wettest May in 1991-2020 was in 2019 (6.9 in); the driest was in 2007 (1.2 in).
Is May a good time to visit Stamford?
May ranks 1st of 12 months on our comfort score for Stamford (73 out of 100). It has about 16 comfortable days. The best month is May.
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.