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When is the best time to visit San Francisco?

The best time to visit San Francisco is between May and October, the most comfortable stretch of the year on these averages.

San Francisco has four seasons without a desert summer or a guaranteed freeze. Pack for mixed weather. The good outdoor weeks are real, and so are the grey ones. San Francisco is a city in United States. This page is about San Francisco, not a country average.

Most visitors come for cities, walking and the milder stretch of the year. Treat midwinter as museums and food unless you like weather for its own sake. The monthly table owns the averages. This layer is how San Francisco actually feels.

Part of United States weather.

San Francisco
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Spring

Spring in San Francisco is when the year becomes walkable again. March, April and May are mixed: bright days, wet days, and the odd reminder that winter has not fully left.

In San Francisco the meteorological summer is June, July and August and winter is December, January and February. This is a good month-range for a city break that wants outdoor hours without betting the packing list on heat. Carry a shell.

Read San Francisco in this stretch as its own climate, not as a generic holiday season copied from another destination.

Summer

Summer in San Francisco is the most usable stretch of the year: June, July and August. Long days, milder nights, and outdoor weather that makes a city break feel like a holiday.

In San Francisco the meteorological summer is June, July and August and winter is December, January and February. It is still a mixed-sky climate. A grey afternoon is not a surprise. Pack for sitting outside and for the hour you duck into a museum because the sky decided otherwise.

Autumn

Autumn in San Francisco is the second spring, then a slide: September, October and November. Early weeks are for walking. Later weeks are for jackets and shorter outdoor plans.

In San Francisco the meteorological summer is June, July and August and winter is December, January and February. Rain returns as a planning constraint. San Francisco in these months is still a good city-break climate if you pack for weather instead of for a brochure afternoon.

Read San Francisco in this stretch as its own climate, not as a generic holiday season copied from another destination.

Winter

Winter in San Francisco is grey, wet and short on daylight: December, January and February. Snow is possible and not the identity of the season. Museums, food and walking between showers are the trip.

In San Francisco the meteorological summer is June, July and August and winter is December, January and February. A bright winter afternoon in San Francisco is worth going out for. The rest of the day is not a failed summer. It is the climate this place actually has.

San Francisco weather by month

TemperatureRainfall

Source: MeteostatPeriod: 1991-2020Checked: 1 Oct 2026358 places covered

Average temperature and rainfall, month by month

Every figure below is a 1991–2020 climate normal for San Francisco, in °C and °F. Open a month for what to expect and what to pack.

San Francisco weather by month: average temperature, rainfall and wind for each month, from 1991–2020 climate normals
MonthAverageRainfall
January11°C / 51°F99 mm
February12°C / 53°F100 mm
March13°C / 55°F69 mm
April14°C / 57°F35 mm
May15°C / 60°F13 mm
June17°C / 62°F4 mm
July18°C / 64°F0 mm
August18°C / 65°F1 mm
September18°C / 65°F2 mm
October17°C / 63°F19 mm
November13°C / 56°F50 mm
December11°C / 51°F106 mm

Where to stay in San Francisco

Dates are a starting point for May.

All hotels in San Francisco

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FAQs about San Francisco weather

Climate averages for San Francisco, 1991–2020.

The best time to visit San Francisco is between May and October, the most comfortable stretch of the year on these averages.

September is the hottest month, with an average around 18°C.

December is the wettest month, with about 106 mm of rain.

San Francisco has a distinct rainy season from December to March, peaking in December at about 106 mm. The dry season runs from April to November.

January is the coolest month, averaging 11°C (51°F) against 18°C (65°F) in September.

This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what each month is usually like, which is what you want when booking ahead. For today or the coming week, check a live forecast.

No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.