Santa Cruz weather in May

In May, Santa Cruz sees average daytime highs of 58°F and overnight lows near 52°F, with 0.8 in of rain across 3 wet days and about 13.9 hours of daylight. It is the 7th-warmest and 8th-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 61% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Santa Cruz's 6th-clearest and 2nd-windiest month. For the whole year in context, see Santa Cruz's year-round climate.

Daytime high
58°
7th warmest
Overnight low
52°
6th coldest
Rainfall
0.8 in
3 wet days
Daylight
14 hours
5:05 AM – 7:04 PM
Cloud cover
36%
6th clearest
Wind
8 mph
2nd windiest
Solar energy
7.04 kWh/m²
Travel score
5.4
out of 10

Santa Cruz is city in and county seat of Santa Cruz County, California, United States.

Density
1,567/km²
people per km²
Founded
1791

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in Santa Cruz reaches about 58°F in the afternoon and slips back to 52°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 62°F. Set against its neighbours, May runs on par with April and about 2°F cooler than June.

40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
15851
25851
35851
45851
55851
65852
75852
85852
95852
105852
115852
125852
135852
145852
155852
165852
175852
185852
195852
205852
215852
225852
235852
245852
255853
265853
275953
285953
295953
305953
315953

Santa Cruz weather by month

How May compares with the rest of the year at a glance. May is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan56° / 49°5.79.69.83.8
Feb56° / 49°5.69.410.63.8
Mar56° / 50°3.99.111.74.1
Apr57° / 51°1.8512.94.7
May58° / 52°0.8313.95.4
Jun60° / 54°0.20.914.56.5
Jul62° / 56°0.00.114.37.2
Aug63° / 57°0.00.113.47.8
Sep64° / 58°0.10.612.37.9
Oct63° / 56°1.22.9117.1
Nov59° / 52°2.66.1105.2
Dec56° / 49°5.39.69.53.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27327
37327
47327
57426
67426
77426
87426
97426
107426
117525
127525
137525
147525
157525
167525
177525
187525
197525
207525
217624
227624
237624
247723
257822
267822
277921
287921
297921
308020
318119

Chance of precipitation in May

Any precipitation

Santa Cruz gets around 0.8 in of rain over 3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 11% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
110
210
310
410
510
610
710
810
910
1010
1111
1211
1311
1411
1511
1611
1711
1811
1910
2010
2110
2210
239
249
258
268
277
287
297
306
316

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
8991
9991
10991
11991
12991
13991
14982
15982
16982
17982
18982
19982
20982
21973
22973
23973
24973
25973
26973
27973
28964
29964
30964
31964

Wind in May

Winds average 8 mph in May.

Across May, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:20 AM to 4:56 AM, and sunset from 6:50 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:206:50
213.55:196:51
313.65:186:52
413.65:176:53
513.65:166:54
613.75:156:55
713.75:146:56
813.75:136:57
913.85:126:57
1013.85:116:58
1113.85:106:59
1213.95:097:00
1313.95:087:01
1413.95:077:02
1513.95:067:03
1614.05:057:04
1714.05:047:04
1814.05:047:05
1914.15:037:06
2014.15:027:07
2114.15:017:08
2214.15:017:08
2314.25:007:09
2414.24:597:10
2514.24:597:11
2614.24:587:12
2714.24:587:12
2814.34:577:13
2914.34:577:14
3014.34:567:15
3114.34:567:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.04 kWh/m².

For context, solar energy here swings from a low near 2.37 kWh/m² to a high of 7.7 kWh/m² in June across the year — May's 7.04 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
97.0Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.1Intense
187.1Intense
197.1Intense
207.1Intense
217.1Intense
227.1Intense
237.2Intense
247.2Intense
257.2Intense
267.2Intense
277.3Intense
287.3Intense
297.3Intense
307.3Intense
317.4Intense
Planning a trip in May

Hazard calendar for Santa Cruz

In seasonPeak

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

Santa Cruz'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 May a good time to visit Santa Cruz?

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

5.4
Sightseeing
6th-best month of the year
0.0
Beach & pool
7th-best month of the year

May is a reasonable time to visit Santa Cruz for sightseeing.

What to pack for Santa Cruz in May

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

In May, Santa Cruz sees daytime highs around 58°F and nights near 52°F. Pack sun protection. Worth having: a warm layer. About 3 days see rain.

sun protectiona warm layer

Sea temperature near Santa Cruz in May

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

The sea at the nearest coast (about 9 mi away) is warmest in September at about 58°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
Jan55Bracing
Feb55Bracing
Mar55Bracing
Apr54Bracing
May54Bracing
Jun55Bracing
Jul57Bracing
Aug58Bracing
Sep58Bracing
Oct58Bracing
Nov57Bracing
Dec55Bracing

UV index in Santa Cruz in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Cruz peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 13UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Santa Cruz in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Santa Cruz is worst in August — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (June, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1816 µg/m³Jun 186 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar8Good
Apr7Good
May7Good
Jun6Good
Jul6Good
Aug17Moderate
Sep11Good
Oct10Good
Nov9Good
Dec6Good
Location & terrain

Where is Santa Cruz?

Santa Cruz sits at 37.0°N, 122.0°W, 36 ft above sea level, in United States. The nearest listed city is Live Oak, 3.1 mi away.

Topography around Santa Cruz

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

Within 2 miles, the terrain around Santa Cruz has only modest variations in elevation — a maximum elevation change of 755 ft around an average of 131 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,520 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,820 ft.

The land around Santa Cruz is covered by artificial surfaces (44%) and trees (30%) within 2 miles, water (46%) and trees (42%) within 10 miles, and water (33%), trees (29%) and grassland (25%) within 50 miles.

2 miles
755 ft
10 miles
2,520 ft
50 miles
4,820 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Live Oak 3.1 mi · Watsonville 16 mi · Los Gatos 18 mi · Saratoga 20 mi · Campbell 22 mi · Morgan Hill 24 mi · Marina 24 mi · Cupertino 24 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 Santa Cruz (36.9741°, -122.0308°, elevation 36 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).