Westerly weather in May: Westerly, Rhode Island: normal highs, lows, rain and records for May
Westerly in May has a normal high of 67°F and a normal low of 50°F, a daily mean of 58°F, rising from 63°F on the 1st to 70°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 3.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 10°C, 84 mm of precipitation in May.
- NOAA stationWesterly State Airport
- Station IDUSW00014794
- Location41.35°N 71.80°W
- Elevation81 ft (25 m)
- From the center2 miles
- Population (town)23,288
- Census place18,528
- Jan 40° 25°
- Feb 41° 26°
- Mar 47° 32°
- Apr 57° 41°
- May 67° 50°
- Jun 75° 59°
- Jul 82° 66°
- Aug 81° 64°
- Sep 74° 57°
- Oct 64° 47°
- Nov 54° 38°
- Dec 45° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Westerly in May?
The normal high is 67°F and the normal low 50°F, for a daily mean of 58.3°F. May is 9.4°F warmer than April and 8.9°F cooler than June. May is the 5th warmest month of the year in Westerly and the 10th wettest. Across the month the normal high rises 7°F, from 63°F on May 1 to 70°F on May 31. From one year to the next May's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Mays in three average between 56°F and 60°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 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 63°F | 46°F | 38% | 22% |
| May 8 | 65°F | 48°F | 38% | 22% |
| May 15 | 66°F | 50°F | 38% | 23% |
| May 22 | 68°F | 52°F | 38% | 24% |
| May 31 | 70°F | 54°F | 38% | 24% |
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 | 63°F | 46°F | 38% | 22% | 14 h |
| May 2 | 63°F | 46°F | 38% | 22% | 14 h |
| May 3 | 63°F | 46°F | 38% | 22% | 14 h |
| May 4 | 64°F | 47°F | 38% | 22% | 14 h |
| May 5 | 64°F | 47°F | 38% | 22% | 14 h 10 min |
| May 6 | 64°F | 47°F | 38% | 22% | 14 h 10 min |
| May 7 | 65°F | 47°F | 38% | 22% | 14 h 10 min |
| May 8 | 65°F | 48°F | 38% | 22% | 14 h 10 min |
| May 9 | 65°F | 48°F | 38% | 22% | 14 h 20 min |
| May 10 | 65°F | 48°F | 38% | 22% | 14 h 20 min |
| May 11 | 66°F | 49°F | 38% | 22% | 14 h 20 min |
| May 12 | 66°F | 49°F | 38% | 23% | 14 h 20 min |
| May 13 | 66°F | 49°F | 38% | 23% | 14 h 20 min |
| May 14 | 66°F | 49°F | 38% | 23% | 14 h 30 min |
| May 15 | 66°F | 50°F | 38% | 23% | 14 h 30 min |
| May 16 | 67°F | 50°F | 38% | 23% | 14 h 30 min |
| May 17 | 67°F | 50°F | 38% | 23% | 14 h 30 min |
| May 18 | 67°F | 51°F | 38% | 23% | 14 h 30 min |
| May 19 | 67°F | 51°F | 38% | 23% | 14 h 40 min |
| May 20 | 68°F | 51°F | 38% | 24% | 14 h 40 min |
| May 21 | 68°F | 51°F | 38% | 24% | 14 h 40 min |
| May 22 | 68°F | 52°F | 38% | 24% | 14 h 40 min |
| May 23 | 68°F | 52°F | 38% | 24% | 14 h 40 min |
| May 24 | 69°F | 52°F | 38% | 24% | 14 h 40 min |
| May 25 | 69°F | 53°F | 38% | 24% | 14 h 50 min |
| May 26 | 69°F | 53°F | 38% | 24% | 14 h 50 min |
| May 27 | 69°F | 53°F | 38% | 24% | 14 h 50 min |
| May 28 | 69°F | 54°F | 38% | 24% | 14 h 50 min |
| May 29 | 70°F | 54°F | 38% | 24% | 14 h 50 min |
| May 30 | 70°F | 54°F | 38% | 24% | 14 h 50 min |
| May 31 | 70°F | 54°F | 38% | 24% | 15 h |
- Normal high
- 67°FMay average
- Normal low
- 50°FMay average
- Precipitation
- 3.32 inmonth total
- Days with precipitation
- 120.01 inch or more
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 10
- Days at 80°F or more
- 1
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014794; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Westerly in May?
On a given May day the chance of 0.01 inch or more is 38% on average, highest around May 12 (38%). In all, 3.32 in falls on 12 days of a normal May, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014794.
What are the records for May in Westerly?
The warmest May temperature on this station's record (since 1999) is 91°F, on May 31, 2022; the coldest is 29°F, on May 1, 2008. The wettest May brought 8.13 in (2006).
The May mean against the 1991-2020 normal of 58.3°F: 2021 55.5°F (−2.8), 2022 59.1°F (+0.8), 2023 56.2°F (−2.1), 2024 58.2°F (−0.1), 2025 57.6°F (−0.7), 2026 56.9°F (−1.4). 1 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 55.5°F | −2.8°F | 3.82 in |
| 2022 | 59.1°F | +0.8°F | 2.06 in |
| 2023 | 56.2°F | −2.1°F | 3.20 in |
| 2024 | 58.2°F | −0.1°F | 6.71 in |
| 2025 | 57.6°F | −0.7°F | 7.28 in |
| 2026 | 56.9°F | −1.4°F | 3.15 in |
Source: records: ACIS, station USW00014794; recent months: ACIS, station USW00014794. Records and recent months use complete months only.
How does May in Westerly compare across Rhode Island?
Across the 6 places PlainClimate covers in Rhode Island, May normal highs run from 65°F in Newport to 70°F in Tiverton; Westerly's is 67°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.