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 |
|---|---|---|---|
| 17°C | 32mm | 4.8hrs | 11.5hrs |
Mild and reasonably dry weather often prevails in San Diego during the month of January
Although outside the main holiday season, there is still plenty of pretty acceptable weather around this time of year. This makes it an okay time to visit San Diego.
January is in the winter in San Diego and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 19°C (66°F), whilst at night 6°C (43°F) is normal.
On average January is the driest month of the year in San Diego with around 32mm 1.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.8 hours of sunshine per day.
San Diego weather in January »
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 19°C | 39mm | 5.9hrs | 12hrs |
February in San Diego is generally reasonably dry with the temperature being mild.
It is perhaps a good month to visit San Diego, with some surprisingly good weather at this time of year.
February is in the winter in San Diego and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 8°C (46°F) is normal.
On average February is the 2nd driest month of the year in San Diego with around 39mm 1.5 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 5.9 hours of sunshine per day.
San Diego weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 21mm | 6.6hrs | 12.8hrs |
The weather in March in San Diego is characteristically warm and dry.
It is perhaps the perfect month to visit San Diego, with some extremely good weather at this time of year.
March is in the spring in San Diego and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 12°C (53°F) is normal.
On average March is the 3rd driest month of the year in San Diego with around 21mm 0.8 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 6.6 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 27°C | 41mm | 7hrs | 13.6hrs |
San Diego's weather in April is typically hot, humid and reasonably dry in nature.
It is perhaps a good month to visit San Diego, with some particularly 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 a muggy 30°C (85°F), whilst at night 17°C (62°F) is normal.
On average April is the 4th driest month of the year in San Diego with around 41mm 1.6 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 7 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 28°C | 79mm | 7.4hrs | 14.3hrs |
May is a reasonably dry, humid month in San Diego and the temperature is generally hot.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often not a good and not conducive to spending time outdoors.
May is in the spring in San Diego and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 20°C (68°F) is normal.
On average May is the 5th driest month of the year in San Diego with around 79mm 3.1 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 7.4 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 31°C | 84mm | 9.7hrs | 11.5hrs |
June in San Diego is generally a little damp with the temperature being very hot.
Based on weather alone, this is probably a time of year to avoid going to San Diego for your holidays. The weather is often not a good and not conducive to spending time outdoors.
June is in the summer in San Diego and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 34°C (94°F), whilst at night 22°C (72°F) is normal.
On average June is the 6th driest month of the year in San Diego with around 84mm 3.3 inches of rain making it a a little damp 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 9.7 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 32°C | 54mm | 10.4hrs | 12hrs |
July in San Diego is generally reasonably dry with the temperature being very hot.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit San Diego.
July is in the summer in San Diego and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a warm 36°C (96°F), whilst at night 23°C (73°F) is normal.
On average July is the 6th wettest month of the year in San Diego with around 54mm 2.1 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 10.4 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 32°C | 66mm | 9.7hrs | 12.8hrs |
The weather in August in San Diego is characteristically very hot 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 not a good and not conducive to spending time outdoors.
August is in the summer in San Diego and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a warm 36°C (97°F), whilst at night 23°C (73°F) is normal.
On average August is the 5th wettest month of the year in San Diego with around 66mm 2.6 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 9.7 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 30°C | 124mm | 8.1hrs | 13.6hrs |
San Diego's weather in September is typically hot, humid and wet 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 not a good and not conducive to spending time outdoors.
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 steamy 33°C (92°F), whilst at night 21°C (70°F) is normal.
On average September is the 4th wettest month of the year in San Diego with around 124mm 4.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.1 hours of sunshine per day.
San Diego weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 27°C | 66mm | 7.3hrs | 14.3hrs |
October is a reasonably dry, humid month in San Diego and the temperature is generally warm.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit San Diego.
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 muggy 30°C (85°F), whilst at night 16°C (61°F) is normal.
On average October is the 3rd wettest month of the year in San Diego with around 66mm 2.6 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 7.3 hours of sunshine per day.
San Diego weather in October »
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 36mm | 5.8hrs | 11.5hrs |
The climate in San Diego during November can be summarized as warm and reasonably dry.
It is perhaps a good month to visit San Diego, with some inordinately good weather at this time of year.
November is in the fall / autumn in San Diego and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 25°C (77°F), whilst at night 12°C (53°F) is normal.
On average November is the 2nd wettest month of the year in San Diego with around 36mm 1.4 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 5.8 hours of sunshine per day.
San Diego weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 18°C | 27mm | 4.6hrs | 12hrs |
December in San Diego is generally dry with the temperature being mild.
It is perhaps the perfect month to visit San Diego, with some very good weather at this time of year.
December is in the winter in San Diego and is typically the warmest month of the year. Daytime maximum temperatures average around 21°C (69°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 27mm 1.1 inches of rain making it a 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 4.6 hours of sunshine per day.
Other monthly averages
San Diego weather stats
| Hottest month: | August | 35.6°C 96.1°F |
|---|---|---|
| Driest month: | March | 21mm 0.8ins |
| Sunniest month: | July | 10.4hrs |
| Coldest month: | January | 18.5°C 65.3°F |
| Wettest month: | September | 124mm 4.9ins |
| Warmest sea: | August | 28.9°C 84°F |
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