San Francisco in Spring
In spring (March, April and May), San Francisco sees average daytime highs around 34°C and overnight lows near 24°C, with 212 mm of rain over about 30 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 34°C. The sky is clear or mostly clear about 42% of the time across spring, and the air most often feels oppressive.
Spring is San Francisco's 3rd-best season to visit on our travel score. For the whole year in context, see San Francisco's year-round climate.
- Avg daytime high
- 34°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 212 mm
- 30 wet days
- Avg wind
- 7 km/h
- Travel score
- 3.3
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in San Francisco in Spring
Across spring, daytime highs hold fairly steady around 34°C.
A typical spring day in San Francisco reaches about 34°C and drops to 24°C overnight. The warmest of the three months is April, the coolest March.
How spring really feels in San Francisco
Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Francisco weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 21° | 26 | 3.2 | 11.2 | 5.8 |
| Feb | 31° / 22° | 23 | 2.8 | 11.5 | 5.4 |
| Mar | 32° / 23° | 29 | 4 | 11.9 | 4.4 |
| Apr | 34° / 24° | 30 | 6.6 | 12.3 | 3.2 |
| May | 34° / 25° | 153 | 19 | 12.7 | 2.2 |
| Jun | 33° / 25° | 200 | 24.3 | 12.9 | 2.3 |
| Jul | 31° / 25° | 330 | 28.5 | 12.8 | 2.4 |
| Aug | 31° / 25° | 299 | 28.6 | 12.5 | 2.4 |
| Sep | 31° / 24° | 292 | 27.3 | 12.1 | 2.5 |
| Oct | 31° / 24° | 183 | 18.5 | 11.7 | 3.4 |
| Nov | 31° / 23° | 86 | 9.6 | 11.3 | 4.5 |
| Dec | 30° / 22° | 77 | 6.6 | 11.1 | 5.3 |
Cloud cover in Spring
The sky is clear or mostly clear about 42% of the time across spring.
Chance of precipitation in Spring
San Francisco gets around 212 mm of rain over 30 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 42 min in early March to 12 h 48 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².
Hazard calendar for San Francisco
In spring, San Francisco overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
San Francisco sits in the Pacific typhoon belt; the season peaks July–October.
San Francisco's monsoon runs May–October, when most of the year's rain falls.
Is spring a good time to visit San Francisco?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in San Francisco. The water and warmth also suit a beach or pool day.
What to pack for San Francisco in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, San Francisco sees daytime highs around 34°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 30 days see rain.
UV index in San Francisco in Spring
Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Francisco peaks around March 24 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 11 | 13 | 13 | 13 | 11 | 12 | 13 | 12 | 11 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in San Francisco in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in San Francisco is worst in October — around 49 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 33 | 32 | 36 | 39 | 42 | 46 | 42 | 41 | 49 | 49 | 39 | 33 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 33 | Moderate |
| Feb | 32 | Moderate |
| Mar | 36 | Poor |
| Apr | 39 | Poor |
| May | 42 | Poor |
| Jun | 46 | Poor |
| Jul | 42 | Poor |
| Aug | 41 | Poor |
| Sep | 49 | Poor |
| Oct | 49 | Poor |
| Nov | 39 | Poor |
| Dec | 33 | Moderate |
Where is San Francisco?
San Francisco sits at 15.4°N, 120.8°E, 21 m above sea level, in Philippines. The nearest listed city is Papaya, 4.0 km away.
Topography around San Francisco
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Francisco.
Within 3 km, the terrain around San Francisco has only modest variations in elevation — a maximum elevation change of 18 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 31 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,021 m.
The land around San Francisco is covered by cropland (81%) within 3 km, cropland (78%) within 16 km, and trees (47%) and cropland (31%) within 80 km.
Philippines travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 230 V · 60 Hz
- Prices
- ≈ 33% of US
- price level, 2025
- GDP per capita
- $4,171
- 2025
- Happiness
- 6.2 / 10
- World Happiness, 2025
- Safe drinking water
- 48%
- of population, 2024
- Homicide rate
- 4.3
- per 100k, 2023
- Road deaths
- 12
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 569
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Francisco (15.3557°, 120.84°, elevation 21 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.