Castroville Weather in May
Average highs run from 85°F on May 1 to 91°F on May 31, and lows from 63°F to 70°F. Normal precipitation for the month is 3.38 in over about 8 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
- 87°F
- Average low
- 67°F
- Precipitation
- 3.38 in
- Record high
- 103°FMay 25, 1989
- Record low
- 46°FMay 1, 2005
- Chance of a freeze
- 0%
- Days of 90°F or more
- 11.4
- Daylight
- 13 h 18 min to 13 h 53 min
- Cloud cover
- 61%
- Humidity
- 69%
- Dew point
- 64°F
- Wind
- 10.3 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 | 85°F | 63°F | 100°F 2002 | 46°F 2005 | 23% |
| May 2 | 85°F | 64°F | 99°F 1998 | 48°F 2004 | 23% |
| May 3 | 85°F | 64°F | 100°F 1984 | 48°F 2004 | 24% |
| May 4 | 85°F | 64°F | 101°F 1984 | 47°F 1983 | 24% |
| May 5 | 85°F | 64°F | 101°F 1984 | 47°F 1979 | 24% |
| May 6 | 85°F | 65°F | 102°F 1984 | 49°F 1979 | 24% |
| May 7 | 85°F | 65°F | 100°F 1998 | 49°F 1982 | 24% |
| May 8 | 85°F | 65°F | 97°F 1984 | 50°F 1982 | 24% |
| May 9 | 85°F | 65°F | 99°F 1989 | 46°F 1984 | 24% |
| May 10 | 86°F | 65°F | 100°F 2006 | 52°F 1981 | 24% |
| May 11 | 86°F | 66°F | 94°F 1984 | 47°F 1981 | 24% |
| May 12 | 86°F | 66°F | 98°F 1978 | 48°F 1979 | 24% |
| May 13 | 86°F | 66°F | 100°F 1978 | 49°F 1979 | 24% |
| May 14 | 86°F | 66°F | 98°F 2006 | 50°F 1979 | 24% |
| May 15 | 86°F | 67°F | 96°F 1978 | 52°F 1979 | 24% |
| May 16 | 87°F | 67°F | 97°F 1978 | 51°F 1983 | 24% |
| May 17 | 87°F | 67°F | 96°F 1981 | 56°F 2006 | 24% |
| May 18 | 87°F | 67°F | 96°F 1981 | 53°F 1986 | 24% |
| May 19 | 87°F | 67°F | 102°F 1989 | 51°F 2002 | 24% |
| May 20 | 88°F | 68°F | 100°F 1989 | 51°F 2002 | 24% |
| May 21 | 88°F | 68°F | 98°F 1989 | 57°F 1986 | 24% |
| May 22 | 88°F | 68°F | 101°F 1989 | 52°F 2001 | 24% |
| May 23 | 88°F | 68°F | 100°F 1989 | 52°F 2001 | 24% |
| May 24 | 89°F | 68°F | 101°F 1989 | 59°F 1979 | 24% |
| May 25 | 89°F | 69°F | 103°F 1989 | 62°F 1981 | 24% |
| May 26 | 89°F | 69°F | 101°F 1989 | 59°F 1979 | 24% |
| May 27 | 90°F | 69°F | 98°F 2006 | 62°F 1995 | 24% |
| May 28 | 90°F | 69°F | 97°F 1979 | 62°F 1995 | 24% |
| May 29 | 90°F | 69°F | 98°F 1996 | 57°F 1992 | 24% |
| May 30 | 90°F | 70°F | 99°F 1998 | 55°F 1984 | 24% |
| May 31 | 91°F | 70°F | 101°F 2004 | 52°F 1984 | 24% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:54 AM, sunset 8:12 PM
- May 31
- sunrise 6:37 AM, sunset 8:30 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415454 (Lytle 3W), public domain. Records: NOAA GHCN-Daily, station USC00415454, 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.