Saint Croix weather in July

In July, Saint Croix sees average daytime highs of 28°C and overnight lows near 26°C, with 80 mm of rain across 14.6 wet days and about 13 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 51% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of July to 12 h 48 min by month's end. Set against the rest of the year, July is Saint Croix's 7th-clearest and 1st-windiest month. For the whole year in context, see Saint Croix's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
26°
10th coldest
Rainfall
80 mm
14.6 wet days
Daylight
13 hours
5:56 AM – 6:54 PM
Cloud cover
49%
7th clearest
Wind
27 km/h
1st windiest
Solar energy
6.48 kWh/m²
Travel score
5.9
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical July day in Saint Croix reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, July runs on par with June and on par with August.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232827
242827
252827
262827
272827
282827
292827
302827
312827

How July really feels in Saint Croix

Once humidity and wind are folded in, July averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Saint Croix weather by month

How July compares with the rest of the year at a glance. July is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 25°278.311.17.6
Feb26° / 24°185.911.47.9
Mar26° / 24°206.111.97.9
Apr26° / 25°327.512.47.4
May27° / 26°7512.312.86.3
Jun28° / 26°5811.7136.1
Jul28° / 26°8014.6135.9
Aug28° / 27°10416.912.65.1
Sep28° / 27°13717.612.14.8
Oct28° / 26°12717.911.65.2
Nov27° / 26°11615.511.25.9
Dec26° / 25°4811.7116.9

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 14% of July, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46337
56337
66337
76436
86436
96436
106535
116535
126535
136535
146634
156634
166634
176634
186733
196733
206733
216634
226634
236733
246634
256634
266634
276634
286634
296634
306634
316634

Chance of precipitation in July

Any precipitation

Saint Croix gets around 80 mm of rain over 14.6 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
139
239
339
440
541
641
742
843
944
1045
1146
1247
1348
1448
1549
1649
1749
1850
1950
2050
2150
2250
2350
2450
2549
2649
2749
2849
2949
3049
3149

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
17228
27129
37129
47030
57030
66931
76931
86832
96733
106634
116535
126436
136436
146337
156139
166040
175941
185842
195842
205743
215644
225545
235446
245347
255248
265149
275050
284951
294852
304852
314753

Wind in July

Winds average 27 km/h in July, the windiest month of the year.

Across July, daily wind ranges from about 27 km/h on the calmest days to 28 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
128breezy
228breezy
328breezy
428breezy
528breezy
628breezy
728breezy
828breezy
928breezy
1028breezy
1128breezy
1228breezy
1327breezy
1427breezy
1527breezy
1627breezy
1727breezy
1827breezy
1927breezy
2027breezy
2127breezy
2227breezy
2327breezy
2427breezy
2527breezy
2627breezy
2727breezy
2827breezy
2927breezy
3027breezy
3127breezy

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 hours at the start of July to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over July. Sunrise moves from 5:51 AM to 6:01 AM, and sunset from 6:54 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:516:54
213.05:516:54
313.05:516:54
413.05:526:54
513.05:526:54
613.05:526:54
713.05:536:54
813.05:536:54
913.05:536:54
1013.05:546:54
1113.05:546:54
1213.05:546:54
1313.05:556:54
1413.05:556:54
1513.05:556:54
1613.05:566:54
1713.05:566:53
1813.05:566:53
1912.95:576:53
2012.95:576:53
2112.95:576:53
2212.95:586:52
2312.95:586:52
2412.95:586:52
2512.95:596:52
2612.95:596:51
2712.95:596:51
2812.96:006:51
2912.86:006:50
3012.86:006:50
3112.86:016:50

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.48 kWh/m².

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6.65 kWh/m² in April across the year — July's 6.48 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in July

Hazard calendar for Saint Croix

In seasonPeak

In July, Saint Croix sits inside its atlantic hurricane, rainy season and dust season. The full year is below, with each hazard's peak months called out.

Saint Croix sits in the Atlantic hurricane belt; the season peaks August–October.

Saint Croix's rainy season runs July–November, when most of the year's rain falls.

Saint Croix sees seasonal dust haze (July), heaviest in July.

Atlantic hurricane
Rainy season
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Saint Croix?

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

5.9
Sightseeing
8th-best month of the year
6.3
Beach & pool
8th-best month of the year

July is a reasonable time to visit Saint Croix for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Saint Croix in July

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

In July, Saint Croix sees daytime highs around 28°C and nights near 26°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 15 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Saint Croix in July

The nearest coast averages about 28°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in September at about 29°C and coldest in February near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb26Warm
Mar26Warm
Apr27Warm
May28Warm
Jun28Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Saint Croix in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint Croix peaks around April 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 12UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Saint Croix in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Saint Croix is worst in July — around 24 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1124 µg/m³Dec 236 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar7Good
Apr9Good
May14Moderate
Jun23Moderate
Jul24Moderate
Aug20Moderate
Sep15Moderate
Oct15Moderate
Nov9Good
Dec6Good
Location & terrain

Where is Saint Croix?

Saint Croix sits at 17.7°N, 64.7°W, 87 m above sea level, in U.S. Virgin Islands. The nearest listed city is Charlotte Amalie, 71 km away.

Charlotte AmalieRoad Town

Topography around Saint Croix

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint Croix.

Within 3 km, the terrain around Saint Croix has only modest variations in elevation — a maximum elevation change of 177 m around an average of 57 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 346 m; within 80 km, significant variations in elevation — a maximum elevation change of 512 m.

The land around Saint Croix is covered by trees (52%) and artificial surfaces (31%) within 3 km, water (74%) within 16 km, and water (96%) within 80 km.

3 km
177 m
16 km
346 m
80 km
512 m
treesshrubsgrasslandartificial surfacesbare terrainwater
July weather nearby: Charlotte Amalie 71 km · Road Town 79 km · Fajardo 117 km · Humacao 124 km · Carolina 147 km · Guayama 147 km · Caguas 149 km · Trujillo Alto 150 km

U.S. Virgin Islands travel facts

Power plugs
Type A / B
110 V · 60 Hz
Prices
≈ 89% of US
price level, 2022
GDP per capita
$44,321
2022
Safe drinking water
99%
of population, 2024
Homicide rate
49.9
per 100k, 2012
Income group
High
World Bank

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 Saint Croix (17.7275°, -64.747°, elevation 87 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). 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).