Richland Weather in May
Average highs run from 82°F on May 1 to 89°F on May 31, and lows from 52°F to 61°F. Normal precipitation for the month is 3.58 in over about 5 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
- 57°F
- Precipitation
- 3.58 in
- Record high
- 97°FMay 19, 1962
- Record low
- 39°FMay 2, 1963
- Chance of a freeze
- 0%
- Days of 90°F or more
- 5.2
- Daylight
- 13 h 26 min to 14 h 07 min
- Cloud cover
- 51%
- Humidity
- 72%
- Dew point
- 62°F
- Wind
- 6.7 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 | 82°F | 52°F | 92°F 2012 | 44°F 1965 | 18% |
| May 2 | 82°F | 52°F | 93°F 1948 | 39°F 1963 | 17% |
| May 3 | 83°F | 53°F | 91°F 1990 | 43°F 1961 | 17% |
| May 4 | 83°F | 53°F | 90°F 1955 | 40°F 1971 | 17% |
| May 5 | 83°F | 53°F | 93°F 1959 | 43°F 1973 | 17% |
| May 6 | 83°F | 54°F | 93°F 1952 | 45°F 1954 | 17% |
| May 7 | 84°F | 54°F | 92°F 1949 | 45°F 1957 | 17% |
| May 8 | 84°F | 54°F | 94°F 1965 | 40°F 1958 | 17% |
| May 9 | 84°F | 55°F | 94°F 1959 | 42°F 1960 | 17% |
| May 10 | 84°F | 55°F | 94°F 1955 | 44°F 1984 | 17% |
| May 11 | 85°F | 55°F | 94°F 2011 | 46°F 1997 | 17% |
| May 12 | 85°F | 55°F | 94°F 2011 | 45°F 1952 | 17% |
| May 13 | 85°F | 56°F | 96°F 2018 | 41°F 1960 | 17% |
| May 14 | 85°F | 56°F | 94°F 1967 | 43°F 1960 | 17% |
| May 15 | 86°F | 56°F | 95°F 1998 | 48°F 1960 | 17% |
| May 16 | 86°F | 57°F | 95°F 1962 | 45°F 1973 | 17% |
| May 17 | 86°F | 57°F | 92°F 1995 | 42°F 1956 | 17% |
| May 18 | 86°F | 57°F | 96°F 1962 | 44°F 1973 | 17% |
| May 19 | 87°F | 58°F | 97°F 1962 | 48°F 1976 | 18% |
| May 20 | 87°F | 58°F | 94°F 1962 | 46°F 1976 | 18% |
| May 21 | 87°F | 58°F | 94°F 1962 | 48°F 1954 | 18% |
| May 22 | 87°F | 59°F | 96°F 2011 | 45°F 1954 | 18% |
| May 23 | 87°F | 59°F | 97°F 1996 | 49°F 1954 | 19% |
| May 24 | 88°F | 59°F | 97°F 1996 | 51°F 1954 | 19% |
| May 25 | 88°F | 59°F | 97°F 2019 | 51°F 1979 | 19% |
| May 26 | 88°F | 60°F | 97°F 2012 | 47°F 1979 | 20% |
| May 27 | 88°F | 60°F | 97°F 1953 | 45°F 1961 | 20% |
| May 28 | 89°F | 60°F | 97°F 1962 | 43°F 1961 | 21% |
| May 29 | 89°F | 61°F | 96°F 2011 | 48°F 1961 | 21% |
| May 30 | 89°F | 61°F | 96°F 2011 | 49°F 1984 | 22% |
| May 31 | 89°F | 61°F | 96°F 1951 | 49°F 1984 | 22% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:53 AM, sunset 8:19 PM
- May 31
- sunrise 6:33 AM, sunset 8:40 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00095394 (Lumpkin 2 Se), public domain. Records: NOAA GHCN-Daily, station USW00093842, 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.