Sullivan County Weather in May
Average highs run from 70°F on May 1 to 80°F on May 31, and lows from 50°F to 60°F. Normal precipitation for the month is 4.66 in over about 13 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
- 75°F
- Average low
- 55°F
- Precipitation
- 4.66 in
- Record high
- 98°FMay 20, 1987
- Record low
- 28°FMay 1, 1903
- Chance of a freeze
- 5%
- Days of 90°F or more
- 1.0
- Daylight
- 13 h 52 min to 14 h 43 min
- Cloud cover
- 65%
- Humidity
- 79%
- Dew point
- 57°F
- Wind
- 9.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 70°F | 50°F | 92°F 1951 | 28°F 1903 | 42% | 0% |
| May 2 | 71°F | 50°F | 91°F 1959 | 32°F 1978 | 42% | 0% |
| May 3 | 71°F | 51°F | 92°F 1928 | 33°F 1967 | 42% | 0% |
| May 4 | 71°F | 51°F | 93°F 1959 | 30°F 1940 | 42% | 0% |
| May 5 | 72°F | 51°F | 94°F 1952 | 34°F 1907 | 42% | 0% |
| May 6 | 72°F | 52°F | 94°F 1949 | 31°F 1944 | 42% | 0% |
| May 7 | 72°F | 52°F | 90°F 1986 | 31°F 1944 | 42% | 0% |
| May 8 | 73°F | 52°F | 94°F 1986 | 32°F 1928 | 42% | 0% |
| May 9 | 73°F | 53°F | 93°F 1896 | 34°F 1923 | 42% | 0% |
| May 10 | 74°F | 53°F | 92°F 1896 | 29°F 1966 | 42% | 0% |
| May 11 | 74°F | 53°F | 90°F 2000 | 32°F 1945 | 41% | 0% |
| May 12 | 74°F | 54°F | 92°F 1902 | 34°F 1909 | 41% | 0% |
| May 13 | 75°F | 54°F | 94°F 1987 | 33°F 1960 | 41% | 0% |
| May 14 | 75°F | 54°F | 92°F 1962 | 30°F 1895 | 41% | 0% |
| May 15 | 75°F | 55°F | 93°F 1988 | 37°F 1920 | 41% | 0% |
| May 16 | 76°F | 55°F | 95°F 2001 | 32°F 1997 | 40% | 0% |
| May 17 | 76°F | 55°F | 97°F 1962 | 38°F 1940 | 40% | 0% |
| May 18 | 76°F | 56°F | 94°F 1962 | 37°F 1941 | 40% | 0% |
| May 19 | 77°F | 56°F | 94°F 1951 | 36°F 1925 | 40% | 0% |
| May 20 | 77°F | 56°F | 98°F 1987 | 36°F 1956 | 39% | 0% |
| May 21 | 77°F | 57°F | 95°F 1902 | 36°F 1954 | 39% | 0% |
| May 22 | 77°F | 57°F | 95°F 1941 | 35°F 1997 | 39% | 0% |
| May 23 | 78°F | 58°F | 92°F 1906 | 36°F 1985 | 39% | 0% |
| May 24 | 78°F | 58°F | 93°F 1921 | 37°F 1929 | 38% | 0% |
| May 25 | 78°F | 58°F | 96°F 1926 | 30°F 1925 | 38% | 0% |
| May 26 | 79°F | 59°F | 97°F 1911 | 34°F 1925 | 38% | 0% |
| May 27 | 79°F | 59°F | 98°F 1911 | 33°F 1961 | 38% | 0% |
| May 28 | 79°F | 59°F | 98°F 1911 | 39°F 1902 | 38% | 0% |
| May 29 | 80°F | 60°F | 97°F 1913 | 38°F 1932 | 38% | 0% |
| May 30 | 80°F | 60°F | 96°F 1913 | 36°F 1924 | 37% | 0% |
| May 31 | 80°F | 60°F | 98°F 1934 | 38°F 1966 | 37% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:51 AM, sunset 8:43 PM
- May 31
- sunrise 6:26 AM, sunset 9:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00122814 (Farmersburg TV-2), public domain. Records: NOAA GHCN-Daily, station USC00116558, 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.