San Francisco is at its best from September to October.
It is busiest and priciest in June to October.
Expect the most rain in November to March.
Here is every month at a glance, the dates to plan around, and flights from five Indian cities.
San Francisco month by month
Average highs and lows, rain, the season and what's on, for the next twelve months.
| Month | Weather | Season | What's on |
|---|---|---|---|
| October 2026Best weather | 22° / 12°mostly dry, 33 mm | Peak | Dussehra |
| November 2026 | 18° / 10°some rain, 61 mm | Shoulder | DiwaliThanksgiving |
| December 2026 | 14° / 8°rainy spells, 129 mm | Shoulder | Christmas and New Year |
| January 2027 | 14° / 8°rainy spells, 124 mm | Off-season | Christmas and New YearRepublic Day weekend |
| February 2027 | 15° / 8°rainy spells, 95 mm | Off-season | Rainy season: mild (13-16°C), and the hills turn green. |
| March 2027 | 16° / 8°rainy spells, 107 mm | Shoulder | HoliGood Friday weekend |
| April 2027 | 17° / 9°mostly dry, 31 mm | Shoulder | Indian summer holidays |
| May 2027 | 19° / 11°dry, 18 mm | Shoulder | Indian summer holidays |
| June 2027 | 21° / 12°dry, 1 mm | Peak | Indian summer holidays |
| July 2027 | 22° / 13°dry, 0 mm | Peak | Fourth of JulyStudent rush |
| August 2027 | 23° / 14°dry, 1 mm | Peak | Student rush |
| September 2027Best weather | 24° / 14°dry, 4 mm | Peak | September and October are the city's warmest, sunniest months, its real summer. |
Dates to plan around
Festivals, holidays and closures in San Francisco, and the Indian holiday rushes that raise fares.
- 20 OctDussehraDussehra falls on Tuesday 20 Oct: many take the Monday off for a four-day weekend, so short trips abroad cost more that week.
- 6–10 NovDiwaliDiwali (Lakshmi Puja on Sunday 8 Nov): the busiest travel week of the autumn. Fares out of India rise, and short trips to Dubai, Bangkok and Singapore book up.
- 25–29 NovThanksgivingThanksgiving (Thursday 26 Nov): the busiest travel days of the US year fall around it, and many shops close on the day.
- 19 Dec – 3 JanChristmas and New YearThe priciest fortnight of the year to fly out of India: school holidays, Christmas and New Year all at once. Book early or go just before or after.
- 23–26 JanRepublic Day weekendRepublic Day falls on Tuesday 26 Jan: take the Monday off and it's a four-day weekend, so short trips abroad book up.
- 22–23 MarHoliHoli (22-23 Mar) and Good Friday (26 Mar) fall in the same week, a favourite week for short trips abroad, so fares rise.
- 26–28 MarGood Friday weekendGood Friday (26 Mar) makes a long weekend in India, just after Holi.
- 15 Apr – 15 Jun · expectedIndian summer holidaysSchool holidays (roughly mid-April to mid-June, varying by state): outbound family travel peaks and fares climb, especially to the Gulf, Southeast Asia and Europe.
- 3–5 JulFourth of JulyIndependence Day falls on a Sunday, so Monday 5 Jul is the holiday: fireworks, and busy roads and airports.
- 20 Jul – 31 Aug · expectedStudent rushThousands of Indian students fly out for autumn intakes, so fares from India to the US, UK, Canada, Australia and Europe peak from late July through August.
- 27–31 OctDiwaliDiwali (Lakshmi Puja on Friday 29 Oct): the busiest travel week of the autumn. Fares out of India rise, and short trips abroad book up.
Flights to San Francisco from India
The cheapest fare our scanner has seen from each city in the last two weeks. Open a route to price every month live.
Good to know
When is the best time to visit San Francisco?
The best weather in San Francisco is from September to October. September and October are the city's warmest, sunniest months, its real summer. Peak season, with the most visitors and the highest hotel prices, is June to October. The quietest months are January to February.
When is the rainy season in San Francisco?
The wettest months are November to March. Rainy season: mild (13-16°C), and the hills turn green.
When is San Francisco most crowded?
Peak season is June to October, when stays cost the most and the sights are busiest.
What is the cheapest way to fly to San Francisco from India?
Of the Indian cities we track, Delhi has the lowest fare right now: ₹83,218 (return, 14 nights) for Mon 25 Jan.
How hot does San Francisco get?
The hottest month is September, with average highs of 24°C; the coolest nights come in January, around 8°C.