Harrisburg Weather in May
Average highs run from 65°F on May 1 to 71°F on May 31, and lows from 42°F to 46°F. Normal precipitation for the month is 2.46 in over about 12 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
- 68°F
- Average low
- 44°F
- Precipitation
- 2.46 in
- Record high
- 95°FMay 17, 2008
- Record low
- 28°FMay 1, 1954
- Chance of a freeze
- 19%
- Daylight
- 14 h 14 min to 15 h 17 min
- Cloud cover
- 66%
- Humidity
- 84%
- Dew point
- 48°F
- Wind
- 5.1 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 | 65°F | 42°F | 88°F 1947 | 28°F 1954 | 44% | |
| May 2 | 65°F | 42°F | 87°F 1946 | 31°F 1952 | 43% | |
| May 3 | 66°F | 42°F | 83°F 1944 | 31°F 1964 | 43% | |
| May 4 | 66°F | 42°F | 85°F 2017 | 31°F 1996 | 42% | |
| May 5 | 66°F | 43°F | 86°F 1953 | 31°F 1978 | 42% | |
| May 6 | 66°F | 43°F | 85°F 1987 | 31°F 1984 | 42% | |
| May 7 | 67°F | 43°F | 90°F 1987 | 33°F 2002 | 41% | |
| May 8 | 67°F | 43°F | 93°F 1987 | 31°F 2002 | 41% | |
| May 9 | 67°F | 43°F | 87°F 1987 | 32°F 1948 | 40% | |
| May 10 | 67°F | 43°F | 85°F 1987 | 32°F 2001 | 40% | |
| May 11 | 67°F | 43°F | 88°F 2024 | 29°F 1985 | 40% | |
| May 12 | 68°F | 44°F | 86°F 1949 | 30°F 1985 | 40% | |
| May 13 | 68°F | 44°F | 89°F 1939 | 34°F 1958 | 39% | |
| May 14 | 68°F | 44°F | 94°F 2023 | 34°F 1947 | 39% | |
| May 15 | 68°F | 44°F | 89°F 2023 | 33°F 1952 | 39% | 0% |
| May 16 | 68°F | 44°F | 89°F 2008 | 32°F 1980 | 39% | 0% |
| May 17 | 69°F | 44°F | 95°F 2008 | 33°F 1976 | 38% | 0% |
| May 18 | 69°F | 44°F | 85°F 1963 | 32°F 2003 | 38% | 0% |
| May 19 | 69°F | 45°F | 86°F 1963 | 33°F 1982 | 38% | 0% |
| May 20 | 69°F | 45°F | 91°F 1963 | 33°F 1975 | 38% | 0% |
| May 21 | 69°F | 45°F | 87°F 1988 | 34°F 1978 | 37% | 0% |
| May 22 | 69°F | 45°F | 90°F 2001 | 32°F 2007 | 37% | 0% |
| May 23 | 69°F | 45°F | 91°F 1947 | 34°F 1978 | 37% | 0% |
| May 24 | 70°F | 45°F | 88°F 1992 | 33°F 1977 | 36% | 0% |
| May 25 | 70°F | 45°F | 89°F 1947 | 34°F 1973 | 36% | 0% |
| May 26 | 70°F | 45°F | 87°F 1950 | 33°F 1973 | 35% | 0% |
| May 27 | 70°F | 45°F | 87°F 1952 | 34°F 1955 | 35% | 0% |
| May 28 | 70°F | 45°F | 92°F 1983 | 32°F 2007 | 35% | 0% |
| May 29 | 70°F | 46°F | 86°F 1995 | 31°F 2001 | 34% | 0% |
| May 30 | 70°F | 46°F | 87°F 1986 | 35°F 1979 | 34% | 0% |
| May 31 | 71°F | 46°F | 90°F 1986 | 32°F 1955 | 34% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:03 AM, sunset 8:17 PM
- May 31
- sunrise 5:32 AM, sunset 8:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024221 (Eugene Mahlon Sweet AP), public domain. Records: NOAA GHCN-Daily, station USW00024221, 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.