San Fernando weather in May

In May, San Fernando sees average daytime highs of 29°C and overnight lows near 25°C, with 61 mm of rain across 12.3 wet days and about 12.5 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of May to 12 h 36 min by month's end. Set against the rest of the year, May is San Fernando's 8th-clearest and 4th-windiest month. For the whole year in context, see San Fernando's year-round climate.

Daytime high
29°
1st warmest
Overnight low
25°
10th coldest
Rainfall
61 mm
12.3 wet days
Daylight
12 h 30 min
5:48 AM – 6:16 PM
Cloud cover
66%
8th clearest
Wind
17 km/h
4th windiest
Solar energy
5.98 kWh/m²
Travel score
5.1
out of 10

San Fernando is city in Trinidad and Tobago.

Density
2,973/km²
people per km²
Founded
1595

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 29°C through the month.

A typical May day in San Fernando reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, May runs on par with April and on par with June.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312925

How May really feels in San Fernando

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

San Fernando weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°399.111.56.7
Feb28° / 24°185.411.77.0
Mar28° / 24°22511.96.5
Apr29° / 25°28612.25.9
May29° / 25°6112.312.55.1
Jun28° / 25°13821.812.64.1
Jul28° / 25°15226.312.53.7
Aug29° / 25°16526.512.33.6
Sep29° / 26°12322.412.13.8
Oct29° / 25°13223.111.83.9
Nov28° / 25°14423.711.54.0
Dec28° / 24°891711.45.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24555
34555
44555
54456
64456
74555
84555
94555
104555
114456
124456
134357
144357
154357
164258
174258
184159
194258
204159
214060
223961
233862
243862
253664
263664
273664
283565
293565
303466
313466

Chance of precipitation in May

Any precipitation

San Fernando gets around 61 mm of rain over 12.3 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 40% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
126
227
327
428
529
629
730
831
931
1032
1132
1233
1334
1435
1536
1637
1738
1839
1941
2042
2143
2245
2347
2448
2550
2652
2753
2855
2957
3058
3160

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
13907
23907
33898
42908
52899
62899
728810
828810
928711
1028711
1118811
1218712
1318712
1418613
1518613
1618613
1718514
1818514
1918514
2018415
2118415
2218316
2318316
2418316
2518217
2618217
2718217
2818217
2918217
3018217
3108317

Wind in May

Winds average 17 km/h in May.

Across May, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 24 min at the start of May to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:52 AM to 5:47 AM, and sunset from 6:14 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:526:14
212.45:526:14
312.45:526:14
412.45:516:14
512.45:516:14
612.45:516:14
712.45:506:15
812.45:506:15
912.45:506:15
1012.45:496:15
1112.45:496:15
1212.45:496:15
1312.45:496:16
1412.55:486:16
1512.55:486:16
1612.55:486:16
1712.55:486:16
1812.55:486:17
1912.55:486:17
2012.55:476:17
2112.55:476:17
2212.55:476:18
2312.55:476:18
2412.55:476:18
2512.55:476:18
2612.55:476:19
2712.55:476:19
2812.55:476:19
2912.55:476:19
3012.55:476:20
3112.65:476:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.98 kWh/m².

For context, solar energy here swings from a low near 4.74 kWh/m² to a high of 6.25 kWh/m² in April across the year — May's 5.98 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.0Intense
146.0Intense
156.0Intense
166.0Intense
176.0Bright
186.0Bright
196.0Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Hazard calendar for San Fernando

In seasonPeak

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

San Fernando's rainy season runs June–December, 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 San Fernando?

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

5.1
Sightseeing
6th-best month of the year
6.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit San Fernando for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Fernando in May

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

In May, San Fernando sees daytime highs around 29°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near San Fernando in May

The nearest coast averages about 28°C 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 20 km away) is warmest in September at about 29°C and coldest in February near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in San Fernando in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Fernando peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 14Dec 12UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in San Fernando 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 San Fernando is worst in June — around 31 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1530 µg/m³Nov 2314 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar19Moderate
Apr23Moderate
May26Moderate
Jun31Moderate
Jul24Moderate
Aug18Moderate
Sep15Moderate
Oct17Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is San Fernando?

San Fernando sits at 10.3°N, 61.5°W, 28 m above sea level, in Trinidad and Tobago. The nearest listed city is Mon Repos, 2.0 km away.

Point FortinChaguanasRio ClaroLaventilleTunapunaParadise

Topography around San Fernando

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

Within 3 km, the terrain around San Fernando has only modest variations in elevation — a maximum elevation change of 156 m around an average of 11 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 318 m; within 80 km, large variations in elevation — a maximum elevation change of 1,037 m.

The land around San Fernando is covered by water (49%) and artificial surfaces (39%) within 3 km, grassland (32%), water (32%) and trees (22%) within 16 km, and water (66%) and trees (22%) within 80 km.

3 km
156 m
16 km
318 m
80 km
1,037 m
treesgrasslandartificial surfaceswaterwetlandmangroves
May weather nearby: Mon Repos 2.0 km · Marabella 4.0 km · Point Fortin 26 km · Chaguanas 27 km · Rio Claro 32 km · Laventille 41 km · Tunapuna 42 km · Paradise 43 km

Trinidad and Tobago travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
115 / 230 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$18,967
2025
Happiness
5.9 / 10
World Happiness, 2025
Safe drinking water
69%
of population, 2024
Homicide rate
40.4
per 100k, 2022
Road deaths
9.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 32%Roman Catholic 22%Hindu 18%other 8%

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 Fernando (10.2797°, -61.4684°, elevation 28 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. 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).