Harris County Weather in May
Average highs run from 83°F on May 1 to 90°F on May 31, and lows from 64°F to 71°F. Normal precipitation for the month is 5.01 in over about 9 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
- 68°F
- Precipitation
- 5.01 in
- Record high
- 99°FMay 29, 1996
- Record low
- 42°FMay 4, 2013
- Chance of a freeze
- 0%
- Days of 90°F or more
- 9.5
- Daylight
- 13 h 20 min to 13 h 56 min
- Cloud cover
- 59%
- Humidity
- 76%
- Dew point
- 67°F
- Wind
- 7.8 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 | 83°F | 64°F | 91°F 2002 | 47°F 2005 | 24% | 0% |
| May 2 | 83°F | 64°F | 91°F 2012 | 45°F 1976 | 25% | 0% |
| May 3 | 84°F | 64°F | 92°F 1984 | 47°F 1978 | 25% | 0% |
| May 4 | 84°F | 65°F | 91°F 2020 | 42°F 2013 | 25% | 0% |
| May 5 | 84°F | 65°F | 93°F 2010 | 49°F 1970 | 25% | 0% |
| May 6 | 84°F | 65°F | 92°F 1984 | 49°F 2013 | 25% | 0% |
| May 7 | 85°F | 66°F | 94°F 1998 | 48°F 1992 | 25% | 0% |
| May 8 | 85°F | 66°F | 93°F 2011 | 47°F 1982 | 26% | 0% |
| May 9 | 85°F | 66°F | 94°F 1998 | 46°F 1984 | 26% | 0% |
| May 10 | 85°F | 66°F | 92°F 2003 | 51°F 1984 | 26% | 0% |
| May 11 | 86°F | 67°F | 91°F 2002 | 47°F 1981 | 26% | 0% |
| May 12 | 86°F | 67°F | 91°F 1986 | 54°F 1981 | 26% | 0% |
| May 13 | 86°F | 67°F | 95°F 2025 | 52°F 1971 | 27% | 0% |
| May 14 | 86°F | 67°F | 96°F 2025 | 47°F 1971 | 27% | 0% |
| May 15 | 87°F | 68°F | 95°F 2025 | 49°F 2014 | 27% | 0% |
| May 16 | 87°F | 68°F | 94°F 2018 | 47°F 1973 | 27% | 0% |
| May 17 | 87°F | 68°F | 96°F 2018 | 52°F 1970 | 27% | 0% |
| May 18 | 88°F | 68°F | 95°F 2022 | 50°F 1976 | 27% | 0% |
| May 19 | 88°F | 69°F | 95°F 2003 | 50°F 1976 | 27% | 0% |
| May 20 | 88°F | 69°F | 96°F 2025 | 54°F 1981 | 27% | 0% |
| May 21 | 88°F | 69°F | 96°F 2005 | 57°F 2002 | 28% | 0% |
| May 22 | 89°F | 69°F | 96°F 1996 | 56°F 2001 | 28% | 0% |
| May 23 | 89°F | 70°F | 95°F 1996 | 52°F 2001 | 28% | 0% |
| May 24 | 89°F | 70°F | 96°F 2025 | 58°F 2017 | 28% | 0% |
| May 25 | 89°F | 70°F | 95°F 2011 | 56°F 1979 | 28% | 0% |
| May 26 | 89°F | 70°F | 98°F 2011 | 57°F 1979 | 29% | 0% |
| May 27 | 90°F | 71°F | 97°F 2011 | 58°F 1988 | 29% | 0% |
| May 28 | 90°F | 71°F | 97°F 2010 | 57°F 1976 | 29% | 0% |
| May 29 | 90°F | 71°F | 99°F 1996 | 58°F 1973 | 29% | 0% |
| May 30 | 90°F | 71°F | 97°F 1998 | 53°F 1984 | 29% | 0% |
| May 31 | 90°F | 71°F | 98°F 1998 | 51°F 1984 | 30% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:39 AM, sunset 7:59 PM
- May 31
- sunrise 6:21 AM, sunset 8:17 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00012960 (Houston Intercont AP), public domain. Records: NOAA GHCN-Daily, station USW00012960, 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.