Nassau County Weather in May
Average highs run from 83°F on May 1 to 88°F on May 31, and lows from 60°F to 68°F. Normal precipitation for the month is 3.42 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
- 86°F
- Average low
- 64°F
- Precipitation
- 3.42 in
- Record high
- 102°FMay 22, 1938
- Record low
- 45°FMay 4, 1939
- Chance of a freeze
- 0%
- Days of 90°F or more
- 8.4
- Daylight
- 13 h 23 min to 14 h 00 min
- Cloud cover
- 48%
- Humidity
- 69%
- Dew point
- 63°F
- Wind
- 5.1 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 | 83°F | 60°F | 96°F 1990 | 47°F 2000 | 20% |
| May 2 | 83°F | 60°F | 95°F 1938 | 47°F 1941 | 20% |
| May 3 | 84°F | 60°F | 97°F 1938 | 47°F 1981 | 20% |
| May 4 | 84°F | 61°F | 97°F 1938 | 45°F 1939 | 20% |
| May 5 | 84°F | 61°F | 95°F 1955 | 46°F 1971 | 20% |
| May 6 | 84°F | 61°F | 96°F 2012 | 45°F 1973 | 20% |
| May 7 | 84°F | 62°F | 95°F 1952 | 48°F 2016 | 21% |
| May 8 | 85°F | 62°F | 96°F 1955 | 45°F 1992 | 21% |
| May 9 | 85°F | 62°F | 96°F 1941 | 51°F 1992 | 21% |
| May 10 | 85°F | 62°F | 94°F 2017 | 49°F 1984 | 22% |
| May 11 | 85°F | 63°F | 98°F 1955 | 47°F 1986 | 22% |
| May 12 | 85°F | 63°F | 98°F 1955 | 47°F 1981 | 23% |
| May 13 | 86°F | 63°F | 100°F 1967 | 47°F 1941 | 23% |
| May 14 | 86°F | 63°F | 99°F 1967 | 47°F 1941 | 24% |
| May 15 | 86°F | 64°F | 97°F 1967 | 48°F 1941 | 24% |
| May 16 | 86°F | 64°F | 97°F 2025 | 50°F 2021 | 25% |
| May 17 | 86°F | 64°F | 96°F 1995 | 46°F 1973 | 26% |
| May 18 | 86°F | 64°F | 95°F 1981 | 46°F 2011 | 26% |
| May 19 | 87°F | 65°F | 97°F 1938 | 51°F 1977 | 27% |
| May 20 | 87°F | 65°F | 99°F 1962 | 49°F 2007 | 27% |
| May 21 | 87°F | 65°F | 101°F 1938 | 50°F 2002 | 28% |
| May 22 | 87°F | 66°F | 102°F 1938 | 47°F 1981 | 29% |
| May 23 | 87°F | 66°F | 100°F 1938 | 48°F 1993 | 29% |
| May 24 | 87°F | 66°F | 98°F 1941 | 52°F 2001 | 30% |
| May 25 | 87°F | 66°F | 99°F 1953 | 54°F 1954 | 31% |
| May 26 | 88°F | 67°F | 99°F 1953 | 47°F 1979 | 32% |
| May 27 | 88°F | 67°F | 100°F 2019 | 49°F 1979 | 32% |
| May 28 | 88°F | 67°F | 99°F 1967 | 52°F 1988 | 33% |
| May 29 | 88°F | 67°F | 99°F 2019 | 53°F 1988 | 34% |
| May 30 | 88°F | 68°F | 99°F 1941 | 51°F 1971 | 34% |
| May 31 | 88°F | 68°F | 99°F 1941 | 50°F 1984 | 35% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:43 AM, sunset 8:06 PM
- May 31
- sunrise 6:25 AM, sunset 8:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00013889 (Jacksonville), public domain. Records: NOAA GHCN-Daily, station USW00013889, 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.