New Haven weather in May: New Haven, Connecticut: normal highs, lows, rain and records for May
New Haven in May has a normal high of 68°F and a normal low of 49°F, a daily mean of 59°F, rising from 64°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 3.54 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 10°C, 90 mm of precipitation in May.
- NOAA stationNew Haven Tweed Airport
- Station IDUSW00014758
- Location41.26°N 72.89°W
- Elevation3 ft (1 m)
- From the center4 miles
- Population137,562
- Jan 38° 23°
- Feb 40° 24°
- Mar 47° 30°
- Apr 58° 39°
- May 68° 49°
- Jun 76° 59°
- Jul 82° 66°
- Aug 81° 65°
- Sep 75° 57°
- Oct 64° 46°
- Nov 53° 36°
- Dec 44° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is New Haven in May?
The normal high is 68°F and the normal low 49°F, for a daily mean of 58.5°F. May is 10.0°F warmer than April and 9.4°F cooler than June. May is the 5th warmest month of the year in New Haven and the 6th wettest. Across the month the normal high rises 8°F, from 64°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Mays in three average between 56°F and 61°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 64°F | 45°F | 40% | 23% |
| May 8 | 66°F | 47°F | 41% | 23% |
| May 15 | 68°F | 49°F | 42% | 24% |
| May 22 | 69°F | 51°F | 42% | 25% |
| May 31 | 72°F | 54°F | 41% | 25% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 64°F | 45°F | 40% | 23% | 14 h |
| May 2 | 64°F | 45°F | 40% | 23% | 14 h |
| May 3 | 64°F | 45°F | 40% | 23% | 14 h |
| May 4 | 64°F | 46°F | 40% | 23% | 14 h |
| May 5 | 65°F | 46°F | 40% | 23% | 14 h 10 min |
| May 6 | 65°F | 46°F | 41% | 23% | 14 h 10 min |
| May 7 | 65°F | 46°F | 41% | 23% | 14 h 10 min |
| May 8 | 66°F | 47°F | 41% | 23% | 14 h 10 min |
| May 9 | 66°F | 47°F | 41% | 23% | 14 h 20 min |
| May 10 | 66°F | 47°F | 41% | 23% | 14 h 20 min |
| May 11 | 66°F | 48°F | 41% | 23% | 14 h 20 min |
| May 12 | 67°F | 48°F | 42% | 23% | 14 h 20 min |
| May 13 | 67°F | 48°F | 42% | 24% | 14 h 20 min |
| May 14 | 67°F | 49°F | 42% | 24% | 14 h 30 min |
| May 15 | 68°F | 49°F | 42% | 24% | 14 h 30 min |
| May 16 | 68°F | 49°F | 42% | 24% | 14 h 30 min |
| May 17 | 68°F | 50°F | 42% | 24% | 14 h 30 min |
| May 18 | 68°F | 50°F | 42% | 24% | 14 h 30 min |
| May 19 | 69°F | 50°F | 42% | 24% | 14 h 40 min |
| May 20 | 69°F | 51°F | 42% | 24% | 14 h 40 min |
| May 21 | 69°F | 51°F | 42% | 24% | 14 h 40 min |
| May 22 | 69°F | 51°F | 42% | 25% | 14 h 40 min |
| May 23 | 70°F | 52°F | 42% | 25% | 14 h 40 min |
| May 24 | 70°F | 52°F | 41% | 25% | 14 h 40 min |
| May 25 | 70°F | 52°F | 41% | 25% | 14 h 50 min |
| May 26 | 70°F | 53°F | 41% | 25% | 14 h 50 min |
| May 27 | 71°F | 53°F | 41% | 25% | 14 h 50 min |
| May 28 | 71°F | 53°F | 41% | 25% | 14 h 50 min |
| May 29 | 71°F | 54°F | 41% | 25% | 14 h 50 min |
| May 30 | 72°F | 54°F | 41% | 25% | 14 h 50 min |
| May 31 | 72°F | 54°F | 41% | 25% | 14 h 50 min |
- Normal high
- 68°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 3.54 inmonth total
- Days with precipitation
- 130.01 inch or more
- Daylight
- 14 h to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 13
- Days at 80°F or more
- 3
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014758; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in New Haven in May?
On a given May day the chance of 0.01 inch or more is 41% on average, highest around May 15 (42%). In all, 3.54 in falls on 13 days of a normal May, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014758.
What are the records for May in New Haven?
The warmest May temperature on this station's record (since 1948) is 95°F, on May 31, 2022; the coldest is 30°F, on May 1, 2008. The wettest May brought 7.77 in (1948).
The May mean against the 1991-2020 normal of 58.5°F: 2021 60.1°F (+1.6), 2022 62.7°F (+4.2), 2023 59.3°F (+0.8), 2024 62.8°F (+4.3), 2025 61.5°F (+3.0), 2026 58.7°F (+0.2). 6 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.1°F | +1.6°F | 4.84 in |
| 2022 | 62.7°F | +4.2°F | 2.71 in |
| 2023 | 59.3°F | +0.8°F | 2.25 in |
| 2024 | 62.8°F | +4.3°F | 4.54 in |
| 2025 | 61.5°F | +3.0°F | 5.28 in |
| 2026 | 58.7°F | +0.2°F | 3.17 in |
Source: records: ACIS, station USW00014758; recent months: ACIS, station USW00014758. Records and recent months use complete months only.
How does May in New Haven compare across Connecticut?
Across the 13 places PlainClimate covers in Connecticut, May normal highs run from 65°F in Groton to 72°F in Stamford; New Haven's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.