Heidelberg Weather in May
Average highs run from 88°F on May 1 to 93°F on May 31, and lows from 68°F to 73°F. Normal precipitation for the month is 2.48 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
- 91°F
- Average low
- 71°F
- Precipitation
- 2.48 in
- Record high
- 108°FMay 10, 2024
- Record low
- 47°FMay 1, 1925
- Chance of a freeze
- 0%
- Days of 90°F or more
- 20.1
- Daylight
- 13 h 09 min to 13 h 40 min
- Cloud cover
- 52%
- Humidity
- 66%
- Dew point
- 68°F
- Wind
- 13.0 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 | 88°F | 68°F | 101°F 1933 | 47°F 1925 | 13% | 0% |
| May 2 | 88°F | 68°F | 103°F 1948 | 52°F 1925 | 13% | 0% |
| May 3 | 88°F | 68°F | 104°F 1984 | 56°F 1929 | 13% | 0% |
| May 4 | 89°F | 68°F | 98°F 1947 | 48°F 1954 | 13% | 0% |
| May 5 | 89°F | 69°F | 105°F 1999 | 50°F 1970 | 13% | 0% |
| May 6 | 89°F | 69°F | 105°F 1999 | 47°F 1944 | 13% | 0% |
| May 7 | 89°F | 69°F | 101°F 1933 | 49°F 1917 | 14% | 0% |
| May 8 | 89°F | 69°F | 100°F 1933 | 50°F 1919 | 14% | 0% |
| May 9 | 89°F | 70°F | 100°F 1998 | 54°F 1992 | 14% | 0% |
| May 10 | 89°F | 70°F | 108°F 2024 | 50°F 2004 | 14% | 0% |
| May 11 | 90°F | 70°F | 103°F 1974 | 55°F 1961 | 14% | 0% |
| May 12 | 90°F | 70°F | 101°F 1974 | 47°F 1952 | 14% | 0% |
| May 13 | 90°F | 70°F | 105°F 1945 | 50°F 1915 | 14% | 0% |
| May 14 | 90°F | 71°F | 103°F 1945 | 54°F 1976 | 15% | 0% |
| May 15 | 90°F | 71°F | 97°F 1995 | 56°F 1917 | 15% | 0% |
| May 16 | 91°F | 71°F | 103°F 1945 | 55°F 2014 | 15% | 0% |
| May 17 | 91°F | 71°F | 97°F 1946 | 55°F 1970 | 15% | 0% |
| May 18 | 91°F | 71°F | 102°F 1946 | 57°F 1945 | 15% | 0% |
| May 19 | 91°F | 72°F | 100°F 2000 | 58°F 1956 | 15% | 0% |
| May 20 | 91°F | 72°F | 99°F 1946 | 51°F 1934 | 15% | 0% |
| May 21 | 92°F | 72°F | 100°F 1916 | 54°F 1934 | 16% | 0% |
| May 22 | 92°F | 72°F | 102°F 1916 | 60°F 1967 | 16% | 0% |
| May 23 | 92°F | 72°F | 103°F 1944 | 60°F 1967 | 16% | 0% |
| May 24 | 92°F | 72°F | 100°F 1925 | 57°F 1967 | 16% | 0% |
| May 25 | 92°F | 73°F | 100°F 1943 | 57°F 1940 | 16% | 0% |
| May 26 | 93°F | 73°F | 99°F 2000 | 58°F 1930 | 16% | 0% |
| May 27 | 93°F | 73°F | 103°F 1973 | 60°F 1934 | 16% | 0% |
| May 28 | 93°F | 73°F | 100°F 2000 | 62°F 1934 | 16% | 0% |
| May 29 | 93°F | 73°F | 98°F 1938 | 61°F 1930 | 17% | 0% |
| May 30 | 93°F | 73°F | 98°F 1916 | 62°F 1930 | 17% | 0% |
| May 31 | 93°F | 73°F | 102°F 1967 | 58°F 1984 | 17% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:54 AM, sunset 8:03 PM
- May 31
- sunrise 6:39 AM, sunset 8:19 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00418059 (Santa Rosa 3 Wnw), public domain. Records: NOAA GHCN-Daily, station USC00419588, 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.