South San Francisco weather in February

In February, South San Francisco sees average daytime highs of 57°F and overnight lows near 48°F, with 4.4 in of rain across 9.3 wet days and about 10.5 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 57°F through the month. The sky is clear or mostly clear about 33% of the time in February, and the air most often feels dry.

Daylight stretches from about 10 h 06 min at the start of February to 11 hours by month's end. Set against the rest of the year, February is South San Francisco's 11th-clearest and 6th-windiest month. For the whole year in context, see South San Francisco's year-round climate.

Daytime high: 57°; 10th warmest
Overnight low: 48°; 3rd coldest
Rainfall: 4.4 in; 9.3 wet days
Daylight: 10 h 36 min; 7:08 AM – 5:41 PM
Cloud cover: 58%; 11th clearest
Wind: 8 mph; 6th windiest
Solar energy: 3.3 kWh/m²
Travel score: 4.0; out of 10

South San Francisco is city in San Mateo County, California, United States.

Density: 860/km²; people per km²
Founded: 1908

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← January South San Francisco year-round climate March →Best places to visit in February

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

Temperature in February

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 57°F through the month.

A typical February day in South San Francisco reaches about 57°F in the afternoon and slips back to 48°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 62°F. Set against its neighbours, February runs about 1°F warmer than January and on par with March.

	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
Avg high (°F)	56	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57
Avg low (°F)	47	47	47	47	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48

	Avg high (°F)	Avg low (°F)
1	56	47
2	57	47
3	57	47
4	57	47
5	57	48
6	57	48
7	57	48
8	57	48
9	57	48
10	57	48
11	57	48
12	57	48
13	57	48
14	57	48
15	57	48
16	57	48
17	57	48
18	57	48
19	57	48
20	57	48
21	57	48
22	57	48
23	57	48
24	57	48
25	57	48
26	57	48
27	57	48
28	57	48

South San Francisco weather by month

How February compares with the rest of the year at a glance. February is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	55° / 47°	4.3	10.1	9.7	3.7
Feb	57° / 48°	4.4	9.3	10.5	4.0
Mar	58° / 49°	3.2	9.3	11.7	4.5
Apr	59° / 50°	1.5	5	12.9	5.4
May	61° / 52°	0.7	2.8	14	6.3
Jun	64° / 54°	0.2	0.8	14.6	7.5
Jul	65° / 55°	0.0	0.1	14.3	7.8
Aug	66° / 56°	0.0	0.1	13.5	7.9
Sep	67° / 56°	0.1	0.4	12.3	8.1
Oct	65° / 54°	0.9	3.1	11	7.5
Nov	60° / 50°	2.2	6.1	10	5.4
Dec	56° / 47°	4.2	10.1	9.4	3.8

Cloud cover in February

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in February.

Beyond those clear spells, partly cloudy skies cover about 15% of February, with mostly cloudy or overcast conditions the remaining 52%.

	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
Clearer (%)	45	45	45	47	47	46	46	47	47	46	46	45	46	46	47	47	48	48	48	49	49	49	49	50	50	51	52	52
Cloudier (%)	55	55	55	53	53	54	54	53	53	54	54	55	54	54	53	53	52	52	52	51	51	51	51	50	50	49	48	48

	Clearer (%)	Cloudier (%)
1	45	55
2	45	55
3	45	55
4	47	53
5	47	53
6	46	54
7	46	54
8	47	53
9	47	53
10	46	54
11	46	54
12	45	55
13	46	54
14	46	54
15	47	53
16	47	53
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	50	50
25	50	50
26	51	49
27	52	48
28	52	48

Chance of precipitation in February

Any precipitation

South San Francisco gets around 4.4 in of rain over 9.3 wet days in February, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 36% 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
Rain chance (%)	30	30	30	30	30	31	31	32	32	33	34	34	35	35	35	35	35	35	36	36	36	36	36	36	36	35	35	35

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	32
9	32
10	33
11	34
12	34
13	35
14	35
15	35
16	35
17	35
18	35
19	36
20	36
21	36
22	36
23	36
24	36
25	36
26	35
27	35
28	35

Humidity in February

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, February lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	99	99	99	99	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99	100	100	100	100	100	100	100	100	100
Comfortable (%)	1	1	1	1	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0

Wind in February

Winds average 8 mph in February.

Across February, daily wind ranges from about 7 mph on the calmest days to 8 mph 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
Wind speed (mph)	7	7	7	7	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	7	calm
2	7	calm
3	7	light breeze
4	7	light breeze
5	8	light breeze
6	8	light breeze
7	8	light breeze
8	8	light breeze
9	8	light breeze
10	8	light breeze
11	8	light breeze
12	8	light breeze
13	8	light breeze
14	8	light breeze
15	8	light breeze
16	8	light breeze
17	8	light breeze
18	8	light breeze
19	8	light breeze
20	8	light breeze
21	8	light breeze
22	8	light breeze
23	8	light breeze
24	8	light breeze
25	8	light breeze
26	8	light breeze
27	8	light breeze
28	8	light breeze

Sunrise & sunset in February

DaylightNight

Daylight runs from about 10 h 06 min at the start of February to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over February. Sunrise moves from 7:21 AM to 6:52 AM, and sunset from 5:26 PM to 5:55 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
Daylight (h)	10.1	10.1	10.1	10.2	10.2	10.2	10.3	10.3	10.3	10.4	10.4	10.4	10.5	10.5	10.6	10.6	10.6	10.7	10.7	10.7	10.8	10.8	10.9	10.9	10.9	11.0	11.0	11.0
Sunrise (AM)	7:21	7:20	7:19	7:18	7:17	7:17	7:16	7:15	7:14	7:13	7:12	7:11	7:10	7:09	7:08	7:06	7:05	7:04	7:03	7:02	7:01	6:59	6:58	6:57	6:56	6:54	6:53	6:52
Sunset (PM)	5:26	5:27	5:28	5:29	5:30	5:31	5:32	5:33	5:34	5:35	5:37	5:38	5:39	5:40	5:41	5:42	5:43	5:44	5:45	5:46	5:47	5:48	5:49	5:50	5:51	5:52	5:54	5:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.1	7:21	5:26
2	10.1	7:20	5:27
3	10.1	7:19	5:28
4	10.2	7:18	5:29
5	10.2	7:17	5:30
6	10.2	7:17	5:31
7	10.3	7:16	5:32
8	10.3	7:15	5:33
9	10.3	7:14	5:34
10	10.4	7:13	5:35
11	10.4	7:12	5:37
12	10.4	7:11	5:38
13	10.5	7:10	5:39
14	10.5	7:09	5:40
15	10.6	7:08	5:41
16	10.6	7:06	5:42
17	10.6	7:05	5:43
18	10.7	7:04	5:44
19	10.7	7:03	5:45
20	10.7	7:02	5:46
21	10.8	7:01	5:47
22	10.8	6:59	5:48
23	10.9	6:58	5:49
24	10.9	6:57	5:50
25	10.9	6:56	5:51
26	11.0	6:54	5:52
27	11.0	6:53	5:54
28	11.0	6:52	5:55

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 3.3 kWh/m².

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 7.72 kWh/m² in June across the year — February's 3.3 kWh/m² falls in the middle.

	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
Solar energy (kWh/m²)	2.8	2.9	2.9	2.9	3.0	3.0	3.0	3.0	3.1	3.1	3.1	3.2	3.2	3.3	3.3	3.3	3.4	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.8	Moderate
2	2.9	Moderate
3	2.9	Moderate
4	2.9	Moderate
5	3.0	Moderate
6	3.0	Moderate
7	3.0	Moderate
8	3.0	Moderate
9	3.1	Moderate
10	3.1	Moderate
11	3.1	Moderate
12	3.2	Moderate
13	3.2	Moderate
14	3.3	Moderate
15	3.3	Moderate
16	3.3	Moderate
17	3.4	Moderate
18	3.4	Moderate
19	3.5	Moderate
20	3.5	Moderate
21	3.5	Moderate
22	3.6	Moderate
23	3.6	Moderate
24	3.7	Moderate
25	3.7	Moderate
26	3.8	Moderate
27	3.8	Moderate
28	3.9	Moderate

Planning a trip in February

Hazard calendar for South San Francisco

In seasonPeak

In February, South San Francisco sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

South San Francisco's rainy season runs November–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is February a good time to visit South San Francisco?

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

4.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

11th-best month of the year

February is a reasonable time to visit South San Francisco for sightseeing.

What to pack for South San Francisco in February

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

In February, South San Francisco sees daytime highs around 57°F and nights near 48°F. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near South San Francisco in February

The nearest coast averages about 54°F in February — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 12 mi away) is warmest in September at about 58°F and coldest in April near 53°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	53	54	54	53	53	54	56	58	58	57	56	54
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	53	Bracing
Feb	54	Bracing
Mar	54	Bracing
Apr	53	Bracing
May	53	Bracing
Jun	54	Bracing
Jul	56	Bracing
Aug	58	Bracing
Sep	58	Bracing
Oct	57	Bracing
Nov	56	Bracing
Dec	54	Bracing

UV index in South San Francisco in February

LowModerateHighVery highExtreme

Clear-sky midday UV in February peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in South San Francisco peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	5	6	8	10	10	10	6	5	2	2
Level	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme	Very high	High	High	Moderate	Moderate

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	5	Moderate
Apr	6	High
May	8	Very high
Jun	10	Extreme
Jul	10	Extreme
Aug	10	Very high
Sep	6	High
Oct	5	High
Nov	2	Moderate
Dec	2	Moderate

Air quality in South San Francisco in February

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.

Air quality in South San Francisco is worst in August — around 25 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (June, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	18	16	12	10	10	11	25	17	20	18	13
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	18	Moderate
Mar	16	Moderate
Apr	12	Moderate
May	10	Good
Jun	10	Good
Jul	11	Good
Aug	25	Moderate
Sep	17	Moderate
Oct	20	Moderate
Nov	18	Moderate
Dec	13	Moderate

Location & terrain

Where is South San Francisco?

South San Francisco sits at 37.7°N, 122.4°W, 13 ft above sea level, in United States. The nearest listed city is San Bruno, 1.9 mi away.

Topography around South San Francisco

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of South San Francisco.

Within 2 miles, the terrain around South San Francisco has significant variations in elevation — a maximum elevation change of 1,194 ft around an average of 131 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 1,991 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,452 ft.

The land around South San Francisco is covered by artificial surfaces (61%) within 2 miles, water (51%) and artificial surfaces (24%) within 10 miles, and water (41%), trees (22%) and grassland (22%) within 50 miles.

2 miles

1,194 ft

artificial surfaces 61%

10 miles

1,991 ft

water 51%

50 miles

4,452 ft

water 41%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← January South San Francisco year-round climate March →Best places to visit in February

February weather nearby: San Bruno 1.9 mi · Millbrae 3.7 mi · Visitacion Valley 4.3 mi · Daly City 4.3 mi · Pacifica 5.0 mi · Bayview-Hunters Point 5.6 mi · Burlingame 5.6 mi · Noe Valley 6.8 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
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 South San Francisco (37.6547°, -122.4077°, elevation 13 ft), 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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 (°F)	Avg low (°F)
1	56	47
2	57	47
3	57	47
4	57	47
5	57	48
6	57	48
7	57	48
8	57	48
9	57	48
10	57	48
11	57	48
12	57	48
13	57	48
14	57	48
15	57	48
16	57	48
17	57	48
18	57	48
19	57	48
20	57	48
21	57	48
22	57	48
23	57	48
24	57	48
25	57	48
26	57	48
27	57	48
28	57	48

	Clearer (%)	Cloudier (%)
1	45	55
2	45	55
3	45	55
4	47	53
5	47	53
6	46	54
7	46	54
8	47	53
9	47	53
10	46	54
11	46	54
12	45	55
13	46	54
14	46	54
15	47	53
16	47	53
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	50	50
25	50	50
26	51	49
27	52	48
28	52	48

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	32
9	32
10	33
11	34
12	34
13	35
14	35
15	35
16	35
17	35
18	35
19	36
20	36
21	36
22	36
23	36
24	36
25	36
26	35
27	35
28	35

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0

	Avg high (°F)	Avg low (°F)
1	56	47
2	57	47
3	57	47
4	57	47
5	57	48
6	57	48
7	57	48
8	57	48
9	57	48
10	57	48
11	57	48
12	57	48
13	57	48
14	57	48
15	57	48
16	57	48
17	57	48
18	57	48
19	57	48
20	57	48
21	57	48
22	57	48
23	57	48
24	57	48
25	57	48
26	57	48
27	57	48
28	57	48

	Clearer (%)	Cloudier (%)
1	45	55
2	45	55
3	45	55
4	47	53
5	47	53
6	46	54
7	46	54
8	47	53
9	47	53
10	46	54
11	46	54
12	45	55
13	46	54
14	46	54
15	47	53
16	47	53
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	50	50
25	50	50
26	51	49
27	52	48
28	52	48

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	32
9	32
10	33
11	34
12	34
13	35
14	35
15	35
16	35
17	35
18	35
19	36
20	36
21	36
22	36
23	36
24	36
25	36
26	35
27	35
28	35

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0

	Avg high (°F)	Avg low (°F)
1	56	47
2	57	47
3	57	47
4	57	47
5	57	48
6	57	48
7	57	48
8	57	48
9	57	48
10	57	48
11	57	48
12	57	48
13	57	48
14	57	48
15	57	48
16	57	48
17	57	48
18	57	48
19	57	48
20	57	48
21	57	48
22	57	48
23	57	48
24	57	48
25	57	48
26	57	48
27	57	48
28	57	48

	Clearer (%)	Cloudier (%)
1	45	55
2	45	55
3	45	55
4	47	53
5	47	53
6	46	54
7	46	54
8	47	53
9	47	53
10	46	54
11	46	54
12	45	55
13	46	54
14	46	54
15	47	53
16	47	53
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	50	50
25	50	50
26	51	49
27	52	48
28	52	48

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	32
9	32
10	33
11	34
12	34
13	35
14	35
15	35
16	35
17	35
18	35
19	36
20	36
21	36
22	36
23	36
24	36
25	36
26	35
27	35
28	35

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0