San Francisco (United States of America) is a place with a hot climate. Temperatures during the day are in the range from 13.4 °C (56.1 °F) in January to 21.8 °C (71.2 °F) in September. Temperatures during the night go from 6.8 °C (44.2 °F) in January to 13.8 °C (56.8 °F) in August. The least rainy month in San Francisco is July with its 0 days of rain, the rainiest month is February, when it rains 10 days.

January weather

The minimum of the day temperature can be noticed, its value is 13.4 °C (56.1 °F) in San Francisco, and the minimum of the night temperature can be noticed as well in January. The beginning of the descent of the rainfall amount could be noticed in this month. The number of sun hours (without clouds) rise's start could be observed, with its value being 6 hours. The minimum of the wind speed can be noticed in this month.

February weather

The day temperature rise's start could be observed, the value of this measure is 14.9 °C (58.8 °F) in San Francisco, and the night temperature starts to rise too, its value is 8.1 °C (46.6 °F). The maximum of the number of rainy days can be noticed in this month. The number of sun hours (without clouds) rises similarly to the previous month, its value is 7 hours.

March weather

The beginning of the descent of the rainfall amount could be noticed, its value is 113 mm (4.44 in) in San Francisco. The rise of the day temperature can be observed, the value of this measure is 16.3 °C (61.3 °F), and the night temperature rises similarly to the previous month as well, the value of this measure is 8.6 °C (47.5 °F). The number of sun hours (without clouds) rises similarly to the previous month, with its value being 9 hours.

April weather

The rise of the day temperature can be observed, its value is 17.6 °C (63.7 °F) in San Francisco, while the sea temperature reaches its minimum in this month. The number of rainy days starts to descent, the value of this measure is 6 days, while the descent of the rainfall amount can be observed. The night temperature rises similarly to the previous month, with its value being 9.5 °C (49.1 °F). The number of sun hours (without clouds) continues to rise, with its value being 10 hours.

May weather

The day temperature continues to rise, the value of this measure is 18.6 °C (65.5 °F) in San Francisco, and the rise of the night temperature can be observed too, with its value of 11.1 °C (52.0 °F). The tourist season is about to start. The rainfall amount continues to descent, with its value being 21 mm (0.82 in), and the number of rainy days descents similarly to the previous month as well, with its value being 3 days. The maximum of the number of sun hours (without clouds) can be noticed, with its value being 11 hours.

June weather

The ongoing tourist season is noticeable in San Francisco. The day temperature rises similarly to the previous month, the value of this measure is 20.1 °C (68.2 °F), while the sea temperature rise's start could be observed, with its value being 12.1 °C (53.8 °F). The number of rainy days descents similarly to the previous month, the value of this measure is 1 days, and the descent of the rainfall amount can be observed as well, with its value of 5 mm (0.19 in). The night temperature rises similarly to the previous month, the value of this measure is 12.4 °C (54.3 °F).

July weather

The rise of the sea temperature can be observed, with its value of 13.2 °C (55.8 °F) in San Francisco, and the night temperature continues to rise as well, with its value of 13.5 °C (56.3 °F). The tourist season continues, and the ongoing dry season is noticeable too. The number of rainy days is on its minimum, and the rainfall amount is on its minimum as well in July.

August weather

The sea temperature rises similarly to the previous month, with its value of 14.1 °C (57.4 °F) in San Francisco, while the night temperature is on its maximum in this month. The dry season is close to its peak, and the tourist season is taking place as well in August. The number of sun hours (without clouds) descent's start could be observed in this month.

September weather

There is pending tourist season in San Francisco, and there is pending dry season too. The maximum of the day temperature is observable, the value of this measure is 21.8 °C (71.2 °F), and the sea temperature reaches its maximum as well. The number of rainy days rise's start could be observed in September. The number of sun hours (without clouds) descents similarly to the previous month, with its value being 9 hours.

October weather

The day temperature starts to descent in San Francisco, and the sea temperature descent's start could be observed as well, with its value of 13.8 °C (56.8 °F). There is pending tourist season. The rainfall amount rise's start could be observed, the value of this measure is 40 mm (1.58 in), while the rise of the number of rainy days can be observed, with its value of 3 days. The number of sun hours (without clouds) descents similarly to the previous month, with its value of 8 hours.

November weather

The day temperature continues to descent, with its value being 17.1 °C (62.8 °F) in San Francisco, and the descent of the sea temperature can be observed too, its value is 13.0 °C (55.3 °F). The rise of the number of rainy days can be observed, the value of this measure is 8 days, and the rainfall amount rises similarly to the previous month too. The number of sun hours (without clouds) descents similarly to the previous month, with its value being 6 hours. The night temperature descents similarly to the previous month, with its value being 9.4 °C (48.9 °F).

December weather

The sea temperature continues to descent, with its value of 12.1 °C (53.7 °F) in San Francisco, and the day temperature continues to descent too. The rainfall amount is on its maximum, its value is 155 mm (6.11 in). The night temperature descents similarly to the previous month, with its value being 7.3 °C (45.1 °F). The number of sun hours (without clouds) reaches its minimum, with its value of 5 hours. The maximum of the humidity can be noticed in this month.

FAQs

What is the humidity in February in San Francisco?

Humidity in San Francisco in February is 77 %.

How windy is it in April in San Francisco?

In April in San Francisco, there will be an average wind scale of 4.4.

Are there good conditions to visit in May in San Francisco?

In May in San Francisco, there are ideal conditions for a vacation. You can expect just 3 days of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 18.6 °C (65.5 °F), but others will feel perfectly fine. The temperature of 11.1 °C (52.0 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.

What is the air temperature in June in San Francisco at night?

The average night temperature in San Francisco in June is 12.4 °C (54.3 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.

How many days of precipitation on average can I expect in July in San Francisco?

In San Francisco in July, we can expect 0 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 0.1 days of the week, or in general - 1 % days.

What is the sea temperature in August in San Francisco?

The temperature of the sea in August in San Francisco is 14.1 °C (57.4 °F). This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.

What temperature can I expect during the day in San Francisco in September?

The average daily temperature in San Francisco in September is 21.8 °C (71.2 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.

Is October part of the wet season in San Francisco?

No, there is no wet season in October in San Francisco - you can expect 3 days of rain during the month.

How many hours of sun to expect in November in San Francisco?

There is an average length of sunshine of 6 hours per day in November in San Francisco.

Is there a dry season in December in San Francisco?

No, December is not a dry month in San Francisco, expect rain approximately 10 days in a month.