San Diego Climate and Average Weather
Climate of San Diego: average temperatures, rainfall and seasons month by month.
Climate in San Diego month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 65° | 48° | 2,4 in | ★★★★☆ |
| February | 65° | 50° | 3,1 in | ★★★★☆ |
| March | 67° | 52° | 2,7 in | ★★★★☆ |
| April | 67° | 54° | 0,5 in | ★★★★★ |
| May | 69° | 58° | 0,3 in | ★★★★★ |
| June | 72° | 61° | 0,1 in | ★★★★★ |
| July | 76° | 64° | 0,0 in | ★★★★★ |
| August | 78° | 65° | 0,6 in | ★★★★★ |
| September | 76° | 64° | 0,8 in | ★★★★★ |
| October | 75° | 58° | 0,8 in | ★★★★★ |
| November | 69° | 52° | 2,1 in | ★★★★☆ |
| December | 66° | 49° | 1,3 in | ★★★★☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Recent extremes in San Diego
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How San Diego compares with nearby places
Annual averages, and the difference against San Diego.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| San Diego County | 0 mi | 63°F | about the same | 15 in |
| Anza-Borrego Desert State Park | 58 mi | 74°F | +43°F warmer | 5 in |
| Orange County | 79 mi | 64°F | +33°F warmer | 16 in |
| Palm Springs | 85 mi | 76°F | +45°F warmer | 8 in |
| Riverside County | 87 mi | 66°F | +35°F warmer | 15 in |
Climate by airport in San Diego
1 airports mapped in this atlas
Climate by beach in San Diego
1 beaches mapped in this atlas
Best time to visit San Diego
Go in April, May, June, July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and March - expect the least comfortable mix of heat, cold or rain.
What this means for San Diego
Today is warmer than average for August. The forecast high of 86°F is 8.3°F above the 78°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 47°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and March - historically the least comfortable months here.
Summary
San Diego is a city in California. San Diego is known for Beaches, zoo and Balboa Park. It has a population of about 1.4 million.
Right now it is 70°F (21°C) in San Diego with clear. It feels like 76°F. Today runs from 67°F to 86°F. Chance of precipitation is 1%. Sightseeing conditions score 9.8/10 - excellent - go now.
The best time to visit San Diego is April, May, June, July, August, September and October. The climate is Mediterranean. January, February and March tend to be the least comfortable months. August is the warmest month with average highs near 78°F, while January is the coldest with lows near 48°F.
The closest major airport is San Diego International Airport (SAN), about 2 mi away. Nearby highlights include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort and Joshua Tree National Park.
In plain terms. Today is warmer than average for August. The forecast high of 86°F is 8.3°F above the 78°F typical for this month. The best window to be outside is roughly 6 PM to 9 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in San Diego today at 9.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about San Diego
| Type | City |
|---|---|
| State | California |
| Country | United States |
| Continent | North America |
| Coordinates | 32°42′56.5″N 117°9′40″W (32.7157, -117.1611) |
| Population | 1.380.000 |
| Known for | Beaches, zoo and Balboa Park |
| Local time | 2:44 PM (UTC-07:00) |
| Best months | April, May, June, July, August, September and October |
| Climate | Mediterranean |
Weather map for San Diego
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore San Diego
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is San Diego?
San Diego is a city in California. Its coordinates are 32.7157, -117.1611. It lies in North America.
What is the weather like in San Diego right now?
It is currently 70°F (21°C) with clear. Humidity is 92% and wind is 3 mph.
When is the best time to visit San Diego?
April, May, June, July, August, September and October offer the most comfortable conditions in San Diego, which has a Mediterranean climate. January, February and March are usually the hardest months for outdoor plans.
What time zone is San Diego in?
San Diego observes America/Los_Angeles (UTC-07:00). The local time is 2:44 PM.
How many people live in San Diego?
San Diego has a population of approximately 1.4 million.
What is the nearest airport to San Diego?
The closest airports are San Diego International Airport (SAN), 2 mi away, Los Angeles International Airport (LAX), 111 mi away and Harry Reid International Airport (LAS), 259 mi away.
What are the top things to do in San Diego?
Popular options include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort, Joshua Tree National Park, Santa Monica State Beach and Hollywood Sign.
What places are in San Diego?
San Diego covers 2 places in this atlas, including San Diego International Airport and Coronado Beach.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 2:44 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
