San Lorenzo weather in March

In March, San Lorenzo sees average daytime highs of 62°F and overnight lows near 47°F, with 2.9 in of rain across 8.8 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 62°F through the month. The sky is clear or mostly clear about 36% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is San Lorenzo's 9th-clearest and 6th-windiest month. For the whole year in context, see San Lorenzo's year-round climate.

Daytime high
62°
9th warmest
Overnight low
47°
4th coldest
Rainfall
2.9 in
8.8 wet days
Daylight
11 h 42 min
6:27 AM – 6:09 PM
Cloud cover
56%
9th clearest
Wind
6 mph
6th windiest
Solar energy
4.66 kWh/m²
Travel score
5.7
out of 10

San Lorenzo is census-designated place in Alameda County, California.

Density
3,269/km²
people per km²

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 62°F through the month.

A typical March day in San Lorenzo reaches about 62°F in the afternoon and slips back to 47°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 71°F. Set against its neighbours, March runs about 3°F warmer than February and about 3°F cooler than April.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16146
26146
36146
46146
56146
66247
76247
86247
96247
106247
116247
126247
136347
146347
156347
166347
176347
186348
196348
206348
216348
226348
236348
246348
256348
266348
276348
286348
296348
306448
316448

San Lorenzo weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan57° / 44°3.79.49.74.2
Feb60° / 45°3.89.110.54.8
Mar62° / 47°2.98.811.75.7
Apr66° / 49°1.34.912.96.9
May69° / 52°0.73.2147.8
Jun73° / 54°0.10.914.69.0
Jul75° / 56°0.00.214.39.4
Aug76° / 56°0.00.113.59.4
Sep76° / 55°0.10.412.39.3
Oct72° / 53°0.82.9118.4
Nov63° / 47°1.85.7106.3
Dec57° / 44°3.49.39.44.2

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
25050
35050
45050
55050
65050
75050
85050
95050
104951
115050
124951
134951
144852
154852
164852
174852
184852
194852
204852
214951
225050
235149
245149
255248
265347
275347
285446
295545
305545
315545

Chance of precipitation in March

Any precipitation

San Lorenzo gets around 2.9 in of rain over 8.8 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
332
431
531
630
730
829
929
1028
1128
1228
1328
1428
1528
1628
1729
1829
1929
2029
2128
2228
2327
2427
2526
2625
2724
2824
2923
3022
3121

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March 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%151015202531
Dry (%)Comfortable (%)
1991
2991
3991
4991
5982
6982
7982
8982
9982
10982
11982
12982
13982
14982
15982
16982
17982
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in March

Winds average 6 mph in March.

Across March, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
317calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 06 min at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over March. Sunrise moves from 6:49 AM to 6:04 AM, and sunset from 5:54 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:495:54
211.16:485:55
311.26:465:56
411.26:455:57
511.26:445:58
611.36:425:59
711.36:416:00
811.46:396:01
911.46:386:02
1011.56:366:03
1111.56:356:04
1211.56:336:05
1311.66:326:06
1411.66:306:07
1511.76:296:08
1611.76:276:09
1711.76:266:10
1811.86:246:11
1911.86:236:12
2011.96:216:13
2111.96:196:14
2211.96:186:15
2312.06:166:16
2412.06:156:17
2512.16:136:18
2612.16:126:19
2712.26:106:19
2812.26:096:20
2912.26:076:21
3012.36:056:22
3112.36:046:23

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.66 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 7.84 kWh/m² in June across the year — March's 4.66 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
13.9Moderate
24.0Moderate
34.0Bright
44.1Bright
54.1Bright
64.2Bright
74.2Bright
84.3Bright
94.3Bright
104.4Bright
114.4Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.1Bright
265.2Bright
275.2Bright
285.3Bright
295.3Bright
305.4Bright
315.5Bright
Planning a trip in March

Is March a good time to visit San Lorenzo?

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

5.7
Sightseeing
9th-best month of the year
1.3
Beach & pool
9th-best month of the year

March is a reasonable time to visit San Lorenzo for sightseeing.

What to pack for San Lorenzo in March

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

In March, San Lorenzo sees daytime highs around 62°F and nights near 47°F. Worth packing: a warm layer, rain gear and sun protection. About 9 days see rain.

a warm layerrain gearsun protection

Sea temperature near San Lorenzo in March

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

The sea at the nearest coast (about 25 mi away) is warmest in August at about 59°F and coldest in April near 54°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
Jan54Bracing
Feb54Bracing
Mar54Bracing
Apr54Bracing
May54Bracing
Jun55Bracing
Jul57Bracing
Aug59Bracing
Sep59Bracing
Oct58Bracing
Nov56Bracing
Dec55Bracing

UV index in San Lorenzo in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Lorenzo 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
Apr7High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in San Lorenzo in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Lorenzo 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 San Lorenzo?

San Lorenzo sits at 37.7°N, 122.1°W, 43 ft above sea level, in United States. The nearest listed city is Ashland, 1.9 mi away.

Topography around San Lorenzo

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

Within 2 miles, the terrain around San Lorenzo has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 33 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,064 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,452 ft.

The land around San Lorenzo is covered by artificial surfaces (75%) within 2 miles, water (36%) and artificial surfaces (26%) within 10 miles, and water (29%), trees (25%) and grassland (25%) within 50 miles.

2 miles
98 ft
10 miles
2,064 ft
50 miles
4,452 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
March weather nearby: Ashland 1.9 mi · Hayward 3.1 mi · Castro Valley 3.1 mi · San Leandro 3.7 mi · Union City 8.1 mi · Alameda 9.9 mi · Dublin 11 mi · Foster City 11 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 San Lorenzo (37.6741°, -122.1332°, elevation 43 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).