San Francisco weather in August

In August, San Francisco sees average daytime highs of 31°C and overnight lows near 25°C, with 299 mm of rain across 28.6 wet days and about 12.5 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 3% of the time in August, and the air most often feels miserable.

Daylight stretches from about 12 h 42 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is San Francisco's 12th-clearest and 7th-windiest month. For the whole year in context, see San Francisco's year-round climate.

Daytime high: 31°; 8th warmest
Overnight low: 25°; 10th coldest
Rainfall: 299 mm; 28.6 wet days
Daylight: 12 h 30 min; 5:45 AM – 6:16 PM
Cloud cover: 89%; 12th clearest
Wind: 6 km/h; 7th windiest
Solar energy: 4.21 kWh/m²
Travel score: 2.4; out of 10

← July San Francisco year-round climate September →Best places to visit in August

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical August day in San Francisco reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, August runs on par with July and on par with September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	31	25
26	31	25
27	31	25
28	31	25
29	31	25
30	31	25
31	31	25

How August really feels in San Francisco

Once humidity and wind are folded in, August averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

14 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Francisco weather by month

How August compares with the rest of the year at a glance. August is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in August, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 7% of August, with mostly cloudy or overcast conditions the remaining 91%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	7	7	7	8	8	8	8	8	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11
Cloudier (%)	93	93	93	92	92	92	92	92	91	91	91	90	90	90	90	90	90	90	90	90	90	90	90	90	90	90	90	90	90	90	89

	Clearer (%)	Cloudier (%)
1	7	93
2	7	93
3	7	93
4	8	92
5	8	92
6	8	92
7	8	92
8	8	92
9	9	91
10	9	91
11	9	91
12	10	90
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	11	89

Chance of precipitation in August

Any precipitation

San Francisco gets around 299 mm of rain over 28.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 92% and peaks near 95% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	95	95	94	94	93	93	92	92	91	91	91	90	90	90	90	91	91	91	92	92	92	92	92	93	93	93	93	93	92	92	92

	Rain chance (%)
1	95
2	95
3	94
4	94
5	93
6	93
7	92
8	92
9	91
10	91
11	91
12	90
13	90
14	90
15	90
16	91
17	91
18	91
19	92
20	92
21	92
22	92
23	92
24	93
25	93
26	93
27	93
28	93
29	92
30	92
31	92

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the miserable band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Oppressive (%)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	2	2	2	2	2	2	2	3	3	3	3	3	3	3
Miserable (%)	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	98	98	98	98	98	98	98	97	97	97	97	97	97	97

	Oppressive (%)	Miserable (%)
1	3	97
2	3	97
3	3	97
4	3	97
5	3	97
6	3	97
7	3	97
8	3	97
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	3	97
16	3	97
17	3	97
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	3	97
26	3	97
27	3	97
28	3	97
29	3	97
30	3	97
31	3	97

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	5	5	5
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 42 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over August. Sunrise moves from 5:42 AM to 5:47 AM, and sunset from 6:23 PM to 6:06 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.7	12.7	12.7	12.7	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.5	12.5	12.5	12.5	12.5	12.5	12.5	12.5	12.4	12.4	12.4	12.4	12.4	12.4	12.4	12.3	12.3	12.3
Sunrise (AM)	5:42	5:42	5:42	5:43	5:43	5:43	5:43	5:44	5:44	5:44	5:44	5:44	5:45	5:45	5:45	5:45	5:45	5:46	5:46	5:46	5:46	5:46	5:46	5:46	5:47	5:47	5:47	5:47	5:47	5:47	5:47
Sunset (PM)	6:23	6:23	6:23	6:22	6:22	6:21	6:21	6:21	6:20	6:20	6:19	6:19	6:18	6:17	6:17	6:16	6:16	6:15	6:14	6:14	6:13	6:13	6:12	6:11	6:10	6:10	6:09	6:08	6:08	6:07	6:06

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.7	5:42	6:23
2	12.7	5:42	6:23
3	12.7	5:42	6:23
4	12.7	5:43	6:22
5	12.6	5:43	6:22
6	12.6	5:43	6:21
7	12.6	5:43	6:21
8	12.6	5:44	6:21
9	12.6	5:44	6:20
10	12.6	5:44	6:20
11	12.6	5:44	6:19
12	12.6	5:44	6:19
13	12.6	5:45	6:18
14	12.5	5:45	6:17
15	12.5	5:45	6:17
16	12.5	5:45	6:16
17	12.5	5:45	6:16
18	12.5	5:46	6:15
19	12.5	5:46	6:14
20	12.5	5:46	6:14
21	12.5	5:46	6:13
22	12.4	5:46	6:13
23	12.4	5:46	6:12
24	12.4	5:46	6:11
25	12.4	5:47	6:10
26	12.4	5:47	6:10
27	12.4	5:47	6:09
28	12.4	5:47	6:08
29	12.3	5:47	6:08
30	12.3	5:47	6:07
31	12.3	5:47	6:06

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.21 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 6.27 kWh/m² in April across the year — August's 4.21 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.1	4.1	4.1	4.1	4.1	4.1	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.3	4.3	4.3	4.3	4.3	4.3
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.1	Bright
2	4.1	Bright
3	4.1	Bright
4	4.1	Bright
5	4.1	Bright
6	4.1	Bright
7	4.2	Bright
8	4.2	Bright
9	4.2	Bright
10	4.2	Bright
11	4.2	Bright
12	4.2	Bright
13	4.2	Bright
14	4.2	Bright
15	4.2	Bright
16	4.2	Bright
17	4.2	Bright
18	4.2	Bright
19	4.2	Bright
20	4.2	Bright
21	4.2	Bright
22	4.2	Bright
23	4.2	Bright
24	4.2	Bright
25	4.2	Bright
26	4.3	Bright
27	4.3	Bright
28	4.3	Bright
29	4.3	Bright
30	4.3	Bright
31	4.3	Bright

Planning a trip in August

Hazard calendar for San Francisco

In seasonPeak

In August, San Francisco sits inside 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.

Pacific typhoon

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is August a good time to visit San Francisco?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.4

Sightseeing

9th-best month of the year

3.7

Beach & pool

11th-best month of the year

August is a weaker month for outdoor sightseeing in San Francisco.

What to pack for San Francisco in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, San Francisco sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in San Francisco in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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

Location & terrain

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.

3 km

18 m

cropland 81%

16 km

31 m

cropland 78%

80 km

2,021 m

trees 47%

treesgrasslandcroplandartificial surfacesbare terrainwater

← July San Francisco year-round climate September →Best places to visit in August

August weather nearby: Papaya 4.0 km · Jaen 9.0 km · Zaragoza 11 km · Cabiao 12 km · Gapan 13 km · San Leonardo 13 km · La Paz 15 km · Aliaga 16 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	31	25
26	31	25
27	31	25
28	31	25
29	31	25
30	31	25
31	31	25

	Clearer (%)	Cloudier (%)
1	7	93
2	7	93
3	7	93
4	8	92
5	8	92
6	8	92
7	8	92
8	8	92
9	9	91
10	9	91
11	9	91
12	10	90
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	11	89

	Rain chance (%)
1	95
2	95
3	94
4	94
5	93
6	93
7	92
8	92
9	91
10	91
11	91
12	90
13	90
14	90
15	90
16	91
17	91
18	91
19	92
20	92
21	92
22	92
23	92
24	93
25	93
26	93
27	93
28	93
29	92
30	92
31	92

	Oppressive (%)	Miserable (%)
1	3	97
2	3	97
3	3	97
4	3	97
5	3	97
6	3	97
7	3	97
8	3	97
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	3	97
16	3	97
17	3	97
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	3	97
26	3	97
27	3	97
28	3	97
29	3	97
30	3	97
31	3	97

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	31	25
26	31	25
27	31	25
28	31	25
29	31	25
30	31	25
31	31	25

	Clearer (%)	Cloudier (%)
1	7	93
2	7	93
3	7	93
4	8	92
5	8	92
6	8	92
7	8	92
8	8	92
9	9	91
10	9	91
11	9	91
12	10	90
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	11	89

	Rain chance (%)
1	95
2	95
3	94
4	94
5	93
6	93
7	92
8	92
9	91
10	91
11	91
12	90
13	90
14	90
15	90
16	91
17	91
18	91
19	92
20	92
21	92
22	92
23	92
24	93
25	93
26	93
27	93
28	93
29	92
30	92
31	92

	Oppressive (%)	Miserable (%)
1	3	97
2	3	97
3	3	97
4	3	97
5	3	97
6	3	97
7	3	97
8	3	97
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	3	97
16	3	97
17	3	97
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	3	97
26	3	97
27	3	97
28	3	97
29	3	97
30	3	97
31	3	97

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	31	25
26	31	25
27	31	25
28	31	25
29	31	25
30	31	25
31	31	25

	Clearer (%)	Cloudier (%)
1	7	93
2	7	93
3	7	93
4	8	92
5	8	92
6	8	92
7	8	92
8	8	92
9	9	91
10	9	91
11	9	91
12	10	90
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	11	89

	Rain chance (%)
1	95
2	95
3	94
4	94
5	93
6	93
7	92
8	92
9	91
10	91
11	91
12	90
13	90
14	90
15	90
16	91
17	91
18	91
19	92
20	92
21	92
22	92
23	92
24	93
25	93
26	93
27	93
28	93
29	92
30	92
31	92

	Oppressive (%)	Miserable (%)
1	3	97
2	3	97
3	3	97
4	3	97
5	3	97
6	3	97
7	3	97
8	3	97
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	3	97
16	3	97
17	3	97
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	3	97
26	3	97
27	3	97
28	3	97
29	3	97
30	3	97
31	3	97