When is the best time to go to San Diego
The chart above shows the best time of year to visit San Diego, United States. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in San Diego
San Diego weather by month
Please note our recommendations for when to visit San Diego are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 53mm | 8.5hrs | 11.2hrs | 15°C |
San Diego's weather in January is typically mild and reasonably dry in nature.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
January is in the winter in San Diego and is typically the coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 7°C (45°F) is normal.
On average January is the driest month of the year in San Diego with around 53mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.5 hours of sunshine per day.
San Diego weather in January »
February
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 43mm | 8.8hrs | 11.9hrs | 15°C |
February in San Diego is generally reasonably dry with the temperature being mild.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
February is in the winter in San Diego and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 8°C (47°F) is normal.
On average February is the 2nd driest month of the year in San Diego with around 43mm 1.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.8 hours of sunshine per day.
San Diego weather in February »
March
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 51mm | 9.1hrs | 12.8hrs | 15°C |
The weather in March in San Diego is characteristically mild and reasonably dry.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
March is in the spring in San Diego and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 10°C (49°F) is normal.
On average March is the 3rd driest month of the year in San Diego with around 51mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.1 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 23mm | 10hrs | 13.8hrs | 16°C |
San Diego's weather in April is typically mild and dry in nature.
It is perhaps a good month to visit San Diego, with some surprisingly good weather at this time of year.
April is in the spring in San Diego and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 11°C (52°F) is normal.
On average April is the 4th driest month of the year in San Diego with around 23mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 10 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 5mm | 8.9hrs | 14.7hrs | 17°C |
May is a very dry month in San Diego and the temperature is generally mild.
It is perhaps a good month to visit San Diego, with some very good weather at this time of year.
May is in the spring in San Diego and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a comfortable 22°C (71°F), whilst at night 13°C (56°F) is normal.
On average May is the 5th driest month of the year in San Diego with around 5mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 8.9 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 21°C | 2mm | 9hrs | 11.2hrs | 18°C |
The weather in June in San Diego is characteristically warm and very dry.
It is perhaps a good month to visit San Diego, with some very good weather at this time of year.
June is in the summer in San Diego and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 15°C (59°F) is normal.
On average June is the 6th driest month of the year in San Diego with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 24°C | 1mm | 10.7hrs | 11.9hrs | 20°C |
July in San Diego is generally very dry with the temperature being warm.
It is perhaps the perfect month to visit San Diego, with some particularly good weather at this time of year.
July is in the summer in San Diego and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 18°C (64°F) is normal.
On average July is the 6th wettest month of the year in San Diego with around 1mm 0 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.7 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 24°C | 2mm | 10.4hrs | 12.8hrs | 20°C |
The weather in August in San Diego is characteristically warm, humid and very dry.
It is perhaps the perfect month to visit San Diego, with some particularly good weather at this time of year.
August is in the summer in San Diego and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 18°C (65°F) is normal.
On average August is the 5th wettest month of the year in San Diego with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.4 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 24°C | 4mm | 9.2hrs | 13.8hrs | 20°C |
San Diego's weather in September is typically warm, humid and very dry in nature.
It is perhaps the perfect month to visit San Diego, with some very good weather at this time of year.
September is in the fall / autumn in San Diego and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 17°C (63°F) is normal.
On average September is the 4th wettest month of the year in San Diego with around 4mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9.2 hours of sunshine per day.
San Diego weather in September »
October
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 22°C | 8mm | 8.6hrs | 14.7hrs | 19°C |
October is a very dry month in San Diego and the temperature is generally warm.
It is perhaps a good month to visit San Diego, with some inordinately good weather at this time of year.
October is in the fall / autumn in San Diego and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 14°C (57°F) is normal.
On average October is the 3rd wettest month of the year in San Diego with around 8mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 8.6 hours of sunshine per day.
San Diego weather in October »
November
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 33mm | 8.4hrs | 11.2hrs | 18°C |
The weather in November in San Diego is characteristically mild and reasonably dry.
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit San Diego.
November is in the fall / autumn in San Diego and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 10°C (51°F) is normal.
On average November is the 2nd wettest month of the year in San Diego with around 33mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.4 hours of sunshine per day.
San Diego weather in November »
December
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 37mm | 8.2hrs | 11.9hrs | 16°C |
December in San Diego is generally reasonably dry with the temperature being mild.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
December is in the winter in San Diego and is typically the warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 8°C (46°F) is normal.
On average December is the wettest month of the year in San Diego with around 37mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
Other monthly averages
San Diego weather stats
| Hottest month: | August | 26.7°C 80.1°F |
|---|---|---|
| Driest month: | July | 1mm 0ins |
| Sunniest month: | January | 8.5hrs |
| Coldest month: | January | 18.4°C 65.1°F |
| Wettest month: | January | 53mm 2.1ins |
| Warmest sea: | September | 20.5°C 68.9°F |
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