Weather in San Diego in May
May in San Diego is mild with average temperatures around 17.5°C (63.5°F). Light rainfall with only 8mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
23.0°C
73.4°F
Low
12.0°C
53.6°F
Precipitation
8 mm
0.3 inches
~1 rainy days
Conditions
Humidity
68%
Comparison to Adjacent Months
May is 2.3°C cooler than June.