Calvert County Weather in May
Average highs run from 71°F on May 1 to 77°F on May 31, and lows from 48°F to 56°F. Normal precipitation for the month is 4.32 in over about 11 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
- 74°F
- Average low
- 52°F
- Precipitation
- 4.32 in
- Record high
- 100°FMay 20, 1996
- Record low
- 36°FMay 10, 1966
- Chance of a freeze
- 12%
- Days of 90°F or more
- 0.6
- Daylight
- 13 h 49 min to 14 h 40 min
- Cloud cover
- 60%
- Humidity
- 77%
- Dew point
- 56°F
- Wind
- 8.5 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 | 71°F | 48°F | 91°F 1986 | 40°F 1988 | 35% | 0% |
| May 2 | 71°F | 48°F | 91°F 2024 | 39°F 2015 | 35% | 0% |
| May 3 | 72°F | 48°F | 90°F 2018 | 38°F 2005 | 35% | 0% |
| May 4 | 72°F | 49°F | 90°F 2018 | 38°F 1986 | 35% | 0% |
| May 5 | 72°F | 49°F | 87°F 1977 | 39°F 2003 | 36% | 0% |
| May 6 | 72°F | 49°F | 89°F 1966 | 44°F 1968 | 36% | 0% |
| May 7 | 72°F | 50°F | 92°F 1986 | 41°F 1970 | 36% | 0% |
| May 8 | 72°F | 50°F | 92°F 2024 | 38°F 1997 | 36% | 0% |
| May 9 | 72°F | 50°F | 94°F 1963 | 38°F 2020 | 36% | 0% |
| May 10 | 73°F | 50°F | 93°F 1963 | 36°F 1966 | 36% | 0% |
| May 11 | 73°F | 51°F | 89°F 1993 | 40°F 1966 | 36% | 0% |
| May 12 | 73°F | 51°F | 90°F 1959 | 42°F 2020 | 36% | 0% |
| May 13 | 73°F | 51°F | 91°F 1956 | 39°F 2020 | 36% | 0% |
| May 14 | 73°F | 52°F | 93°F 1956 | 42°F 1997 | 36% | 0% |
| May 15 | 73°F | 52°F | 89°F 1957 | 46°F 1984 | 36% | 0% |
| May 16 | 74°F | 52°F | 87°F 2013 | 38°F 2016 | 36% | 0% |
| May 17 | 74°F | 52°F | 90°F 1974 | 39°F 1997 | 36% | 0% |
| May 18 | 74°F | 53°F | 91°F 2026 | 43°F 1973 | 36% | 0% |
| May 19 | 74°F | 53°F | 98°F 1996 | 43°F 2009 | 36% | 0% |
| May 20 | 74°F | 53°F | 100°F 1996 | 43°F 2009 | 36% | 0% |
| May 21 | 74°F | 53°F | 96°F 1996 | 39°F 2002 | 36% | 0% |
| May 22 | 75°F | 54°F | 92°F 2022 | 39°F 2002 | 36% | 0% |
| May 23 | 75°F | 54°F | 94°F 1964 | 43°F 2002 | 36% | 0% |
| May 24 | 75°F | 54°F | 94°F 1964 | 47°F 1963 | 36% | 0% |
| May 25 | 75°F | 55°F | 91°F 1991 | 46°F 2013 | 36% | 0% |
| May 26 | 76°F | 55°F | 93°F 2011 | 47°F 1988 | 36% | 0% |
| May 27 | 76°F | 55°F | 97°F 1965 | 46°F 2013 | 36% | 0% |
| May 28 | 76°F | 55°F | 91°F 2019 | 46°F 1997 | 36% | 0% |
| May 29 | 76°F | 56°F | 94°F 2019 | 42°F 1997 | 36% | 0% |
| May 30 | 77°F | 56°F | 96°F 1991 | 49°F 1985 | 36% | 0% |
| May 31 | 77°F | 56°F | 96°F 1991 | 47°F 1967 | 36% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:09 AM, sunset 7:58 PM
- May 31
- sunrise 5:44 AM, sunset 8:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00185865 (Mechanicsville 5 Ne), public domain. Records: NOAA GHCN-Daily, station USW00013721, 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.