Summer temperatures · California
How hot does San Diego get in summer?
San Diego right now
65°FBroken cloud
- Today68°F / 63°FClouds
- Tomorrow73°F / 57°FClouds
- Monday68°F / 61°FClouds
Zero drama, zero charm.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, San Diego averages highs around 75°F and lows around 65°F.
About 3 days a year reach 90°F or hotter, and a day at 100°F comes along less than once a year. About 35 days a year get to 80°F or warmer. That makes it the 34th coolest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 73°F.
San Diego averages summer highs around 75°F and lows around 65°F, so its summer and its winter are mostly the same postcard with a different caption.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 75°F |
|---|---|
| Average summer low | 65°F |
| Days a year at 80°F or warmer | 35 |
| Days a year at 90°F or hotter | 3 |
| Days a year at 100°F or hotter | fewer than one |
| Average winter high, for comparison | 66°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Burlington, Vermont: highs around 80°F, lows around 60°F
- Dubuque, Iowa: highs around 80°F, lows around 60°F
- Lansing, Michigan: highs around 81°F, lows around 59°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00023188.