Watertown Weather in May
Average highs run from 82°F on May 1 to 87°F on May 31, and lows from 58°F to 65°F. Normal precipitation for the month is 3.47 in over about 7 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 85°F
- Average low
- 62°F
- Precipitation
- 3.47 in
- Record high
- 101°FMay 25, 1953
- Record low
- 41°FMay 5, 1971
- Chance of a freeze
- 0%
- Days of 90°F or more
- 9.7
- Daylight
- 13 h 21 min to 13 h 57 min
- Cloud cover
- 51%
- Humidity
- 68%
- Dew point
- 63°F
- Wind
- 4.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 82°F | 58°F | 95°F 1906 | 44°F 1908 | 22% |
| May 2 | 83°F | 58°F | 95°F 1901 | 44°F 1908 | 22% |
| May 3 | 83°F | 58°F | 96°F 1990 | 46°F 1925 | 22% |
| May 4 | 83°F | 59°F | 96°F 1899 | 42°F 1971 | 22% |
| May 5 | 83°F | 59°F | 98°F 1955 | 41°F 1971 | 22% |
| May 6 | 84°F | 59°F | 97°F 1955 | 46°F 1973 | 22% |
| May 7 | 84°F | 59°F | 95°F 1914 | 49°F 1954 | 22% |
| May 8 | 84°F | 60°F | 99°F 1925 | 42°F 1967 | 22% |
| May 9 | 84°F | 60°F | 97°F 1916 | 45°F 1928 | 22% |
| May 10 | 84°F | 60°F | 99°F 1955 | 43°F 1923 | 23% |
| May 11 | 85°F | 60°F | 100°F 1916 | 42°F 1906 | 23% |
| May 12 | 85°F | 61°F | 98°F 1955 | 45°F 1952 | 23% |
| May 13 | 85°F | 61°F | 97°F 1922 | 42°F 2020 | 24% |
| May 14 | 85°F | 61°F | 99°F 1933 | 42°F 2020 | 24% |
| May 15 | 85°F | 61°F | 99°F 1933 | 46°F 1917 | 25% |
| May 16 | 85°F | 62°F | 98°F 1933 | 49°F 1917 | 25% |
| May 17 | 86°F | 62°F | 96°F 1899 | 51°F 1954 | 26% |
| May 18 | 86°F | 62°F | 100°F 1899 | 49°F 1984 | 26% |
| May 19 | 86°F | 62°F | 97°F 1898 | 49°F 2011 | 27% |
| May 20 | 86°F | 63°F | 100°F 1935 | 49°F 1894 | 27% |
| May 21 | 86°F | 63°F | 100°F 1938 | 49°F 2002 | 28% |
| May 22 | 86°F | 63°F | 100°F 1962 | 46°F 1954 | 29% |
| May 23 | 86°F | 63°F | 100°F 1962 | 49°F 1993 | 29% |
| May 24 | 87°F | 64°F | 100°F 1953 | 50°F 1954 | 30% |
| May 25 | 87°F | 64°F | 101°F 1953 | 54°F 1967 | 31% |
| May 26 | 87°F | 64°F | 100°F 1933 | 45°F 1979 | 32% |
| May 27 | 87°F | 65°F | 101°F 1953 | 47°F 1979 | 32% |
| May 28 | 87°F | 65°F | 100°F 1962 | 52°F 1901 | 33% |
| May 29 | 87°F | 65°F | 99°F 1898 | 53°F 1988 | 34% |
| May 30 | 87°F | 65°F | 100°F 1945 | 51°F 1983 | 35% |
| May 31 | 87°F | 65°F | 101°F 1945 | 50°F 1984 | 36% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:47 AM, sunset 8:08 PM
- May 31
- sunrise 6:30 AM, sunset 8:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00084731 (Lake City 2 E), public domain. Records: NOAA GHCN-Daily, station USC00084731, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.