When is the best time to go to San Francisco
The chart above shows the best time of year to visit San Francisco, 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 Francisco
San Francisco weather by month
Please note our recommendations for when to visit San Francisco 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 |
|---|---|---|---|---|
| 12°C | 125mm | 6.4hrs | 10.9hrs | 12°C |
January is a wet month in San Francisco and the temperature is generally mild.
Based on weather alone, this is probably a time of year to avoid going to San Francisco for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
January is in the winter in San Francisco and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 7°C (44°F) is normal.
On average January is the driest month of the year in San Francisco with around 125mm 4.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 hours of sunshine per day.
San Francisco weather in January »
February
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 14°C | 91mm | 7.9hrs | 11.7hrs | 12°C |
February in San Francisco is generally a little damp with the temperature being mild.
Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it an okay time to visit San Francisco.
February is in the winter in San Francisco and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night 8°C (47°F) is normal.
On average February is the 2nd driest month of the year in San Francisco with around 91mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.9 hours of sunshine per day.
San Francisco weather in February »
March
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 14°C | 89mm | 9.3hrs | 12.8hrs | 12°C |
The weather in March in San Francisco is characteristically mild and a little damp.
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 Francisco.
March is in the spring in San Francisco and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 16°C (61°F), whilst at night 9°C (47°F) is normal.
On average March is the 3rd driest month of the year in San Francisco with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.3 hours of sunshine per day.
San Francisco weather in March »
April
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 15°C | 40mm | 11hrs | 14.1hrs | 12°C |
San Francisco's weather in April is typically mild and reasonably dry in nature.
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 Francisco.
April is in the spring in San Francisco and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 17°C (63°F), whilst at night 9°C (48°F) is normal.
On average April is the 4th driest month of the year in San Francisco with around 40mm 1.6 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 11 hours of sunshine per day.
San Francisco weather in April »
May
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 16°C | 7mm | 11.4hrs | 15.1hrs | 12°C |
May is a very dry month in San Francisco and the temperature is generally mild.
It is perhaps a good month to visit San Francisco, with some particularly good weather at this time of year.
May is in the spring in San Francisco and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 18°C (65°F), whilst at night 10°C (50°F) is normal.
On average May is the 5th driest month of the year in San Francisco with around 7mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.4 hours of sunshine per day.
San Francisco weather in May »
June
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 4mm | 11.4hrs | 10.9hrs | 12°C |
The climate in San Francisco during June can be summarized as mild and very dry.
It is perhaps a good month to visit San Francisco, with some inordinately good weather at this time of year.
June is in the summer in San Francisco and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 11°C (52°F) is normal.
On average June is the 6th driest month of the year in San Francisco with around 4mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.4 hours of sunshine per day.
San Francisco weather in June »
July
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 18°C | 1mm | 11.1hrs | 11.7hrs | 13°C |
July in San Francisco is generally very dry with the temperature being mild.
It is perhaps a good month to visit San Francisco, with some extremely good weather at this time of year.
July is in the summer in San Francisco and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 12°C (53°F) is normal.
On average July is the 6th wettest month of the year in San Francisco with around 1mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.1 hours of sunshine per day.
San Francisco weather in July »
August
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 18°C | 2mm | 10.2hrs | 12.8hrs | 14°C |
The weather in August in San Francisco is characteristically mild and very dry.
It is perhaps the perfect month to visit San Francisco, with some very good weather at this time of year.
August is in the summer in San Francisco and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 13°C (55°F) is normal.
On average August is the 5th wettest month of the year in San Francisco 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 10.2 hours of sunshine per day.
San Francisco weather in August »
September
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 7mm | 9.9hrs | 14.1hrs | 14°C |
San Francisco's weather in September is typically mild and very dry in nature.
It is perhaps the perfect month to visit San Francisco, with some inordinately good weather at this time of year.
September is in the fall / autumn in San Francisco and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 13°C (55°F) is normal.
On average September is the 4th wettest month of the year in San Francisco with around 7mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9.9 hours of sunshine per day.
San Francisco weather in September »
October
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 35mm | 8.7hrs | 15.1hrs | 14°C |
October is a reasonably dry month in San Francisco and the temperature is generally mild.
It is perhaps a good month to visit San Francisco, with some inordinately good weather at this time of year.
October is in the fall / autumn in San Francisco and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 12°C (54°F) is normal.
On average October is the 3rd wettest month of the year in San Francisco with around 35mm 1.4 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 8.7 hours of sunshine per day.
San Francisco weather in October »
November
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 15°C | 90mm | 6.4hrs | 10.9hrs | 14°C |
The weather in November in San Francisco is characteristically mild and a little damp.
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 Francisco.
November is in the fall / autumn in San Francisco and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 17°C (63°F), whilst at night 10°C (50°F) is normal.
On average November is the 2nd wettest month of the year in San Francisco with around 90mm 3.5 inches of rain making it a a little damp 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 6.4 hours of sunshine per day.
San Francisco weather in November »
December
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 12°C | 97mm | 5.7hrs | 11.7hrs | 13°C |
December in San Francisco is generally a little damp with the temperature being mild.
Based on weather alone, this is probably a time of year to avoid going to San Francisco for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
December is in the winter in San Francisco and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 7°C (45°F) is normal.
On average December is the wettest month of the year in San Francisco with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.7 hours of sunshine per day.
Other monthly averages
San Francisco weather stats
| Hottest month: | September | 21.4°C 70.5°F |
|---|---|---|
| Driest month: | July | 1mm 0ins |
| Sunniest month: | April | 11hrs |
| Coldest month: | January | 13.2°C 55.8°F |
| Wettest month: | January | 125mm 4.9ins |
| Warmest sea: | September | 14.4°C 57.9°F |
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