Pacifica weather in April

In April, Pacifica sees average daytime highs of 58°F and overnight lows near 51°F, with 1.5 in of rain across 5.3 wet days and about 12.9 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 58°F through the month. The sky is clear or mostly clear about 43% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Pacifica's 7th-clearest and 1st-windiest month. For the whole year in context, see Pacifica's year-round climate.

Daytime high
58°
8th warmest
Overnight low
51°
5th coldest
Rainfall
1.5 in
5.3 wet days
Daylight
13 hours
5:41 AM – 6:39 PM
Cloud cover
48%
7th clearest
Wind
10 mph
1st windiest
Solar energy
6.24 kWh/m²
Travel score
4.8
out of 10

Pacifica is city in San Mateo County, California, USA.

Density
1,197/km²
people per km²
Founded
1957

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 58°F through the month.

A typical April day in Pacifica reaches about 58°F in the afternoon and slips back to 51°F overnight — a 7°F spread between the day's warmth and the night's chill. On most days the high lands between 53°F and 62°F. Set against its neighbours, April runs on par with March and about 1°F cooler than May.

40°50°60°70°151015202530
Avg high (°F)Avg low (°F)
15750
25750
35750
45750
55750
65750
75750
85750
95750
105750
115750
125750
135751
145751
155751
165851
175851
185851
195851
205851
215851
225851
235851
245851
255851
265851
275851
285851
295951
305951

Pacifica weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan55° / 48°4.0109.73.6
Feb56° / 49°4.29.410.53.8
Mar57° / 50°3.19.311.74.2
Apr58° / 51°1.55.312.94.8
May59° / 52°0.73.1145.5
Jun61° / 54°0.20.814.56.5
Jul63° / 55°0.00.114.37.1
Aug64° / 57°0.00.113.47.5
Sep65° / 57°0.10.512.37.7
Oct64° / 55°0.93.1117.1
Nov59° / 52°2.16.2105.1
Dec56° / 49°4.09.89.43.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45743
55743
65644
75743
85743
95842
105842
115941
126040
136139
146139
156238
166139
176238
186337
196337
206337
216436
226436
236436
246436
256436
266436
276436
286436
296436
306436

Chance of precipitation in April

Any precipitation

Pacifica gets around 1.5 in of rain over 5.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 23% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
123
222
322
422
522
621
721
821
921
1021
1121
1220
1320
1420
1519
1619
1718
1817
1917
2016
2116
2215
2315
2414
2514
2613
2713
2813
2912
3012

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

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

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20982
21982
22982
23982
24982
25982
26982
27982
28973
29973
30973

Wind in April

Winds average 10 mph in April, the windiest month of the year.

Across April, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 6:04 AM to 5:22 AM, and sunset from 6:25 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:046:25
212.46:026:26
312.46:016:27
412.55:596:28
512.55:586:29
612.65:566:30
712.65:546:31
812.65:536:32
912.75:516:33
1012.75:506:34
1112.85:486:35
1212.85:476:36
1312.85:456:36
1412.95:446:37
1512.95:436:38
1613.05:416:39
1713.05:406:40
1813.05:386:41
1913.15:376:42
2013.15:356:43
2113.25:346:44
2213.25:336:45
2313.25:316:46
2413.35:306:47
2513.35:296:48
2613.45:276:48
2713.45:266:49
2813.45:256:50
2913.55:246:51
3013.55:226:52

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.24 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 7.64 kWh/m² in June across the year — April's 6.24 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.9Bright
95.9Bright
106.0Bright
116.0Intense
126.1Intense
136.1Intense
146.2Intense
156.2Intense
166.3Intense
176.3Intense
186.3Intense
196.4Intense
206.4Intense
216.5Intense
226.5Intense
236.5Intense
246.6Intense
256.6Intense
266.7Intense
276.7Intense
286.7Intense
296.8Intense
306.8Intense
Planning a trip in April

Hazard calendar for Pacifica

In seasonPeak

None of Pacifica's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Pacifica'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 April a good time to visit Pacifica?

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

4.8
Sightseeing
8th-best month of the year
0.0
Beach & pool
8th-best month of the year

April is a reasonable time to visit Pacifica for sightseeing.

What to pack for Pacifica in April

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

In April, Pacifica sees daytime highs around 58°F and nights near 51°F. Pack sun protection. Worth having: a warm layer. About 5 days see rain.

sun protectiona warm layer

Sea temperature near Pacifica in April

The nearest coast averages about 53°F in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore 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.

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan53Bracing
Feb54Bracing
Mar54Bracing
Apr53Bracing
May53Bracing
Jun54Bracing
Jul56Bracing
Aug58Bracing
Sep58Bracing
Oct57Bracing
Nov56Bracing
Dec54Bracing

UV index in Pacifica in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pacifica 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Pacifica in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Pacifica 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1824 µg/m³Jun 1110 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar16Moderate
Apr12Moderate
May10Good
Jun10Good
Jul11Good
Aug25Moderate
Sep17Moderate
Oct20Moderate
Nov18Moderate
Dec13Moderate
Location & terrain

Where is Pacifica?

Pacifica sits at 37.6°N, 122.5°W, 82 ft above sea level, in United States. The nearest listed city is San Bruno, 4.3 mi away.

Topography around Pacifica

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

Within 2 miles, the terrain around Pacifica has significant variations in elevation — a maximum elevation change of 1,263 ft around an average of 302 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 4,383 ft.

The land around Pacifica is covered by trees (40%) and water (29%) within 2 miles, water (56%) and trees (21%) within 10 miles, and water (45%), trees (21%) and grassland (20%) within 50 miles.

2 miles
1,263 ft
10 miles
1,991 ft
50 miles
4,383 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
April weather nearby: San Bruno 4.3 mi · South San Francisco 5.0 mi · Millbrae 5.6 mi · Daly City 6.2 mi · Burlingame 6.8 mi · Visitacion Valley 8.7 mi · Parkside 8.7 mi · San Mateo 9.3 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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Pacifica (37.6138°, -122.4869°, elevation 82 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).