São Tomé weather in July

In July, São Tomé sees average daytime highs of 24°C and overnight lows near 24°C, with 8 mm of rain across 2 wet days and about 12 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 13% of the time in July, and the air most often feels muggy.

Daylight stretches from about 12 hours at the start of July to 12 hours by month's end. Set against the rest of the year, July is São Tomé's 2nd-clearest and 1st-windiest month. For the whole year in context, see São Tomé's year-round climate.

Daytime high
24°
12th warmest
Overnight low
24°
1st coldest
Rainfall
8 mm
2 wet days
Daylight
12 hours
5:38 AM – 5:39 PM
Cloud cover
66%
2nd clearest
Wind
20 km/h
1st windiest
Solar energy
5.06 kWh/m²
Travel score
8.0
out of 10

São Tomé is capital city of São Tomé and Príncipe.

Density
3,135/km²
people per km²
Founded
1485

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical July day in São Tomé reaches about 24°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 25°C. Set against its neighbours, July runs about 1°C cooler than June and on par with August.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12524
22524
32424
42424
52424
62424
72424
82424
92424
102424
112424
122424
132424
142424
152424
162424
172424
182424
192424
202424
212424
222423
232423
242423
252423
262423
272423
282423
292423
302423
312423

São Tomé weather by month

How July compares with the rest of the year at a glance. July is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 26°13523.6124.3
Feb28° / 26°11319.3124.6
Mar28° / 26°13320.5124.4
Apr28° / 26°13018.7124.8
May27° / 26°11917125.3
Jun25° / 24°234127.5
Jul24° / 24°82128.0
Aug24° / 24°142.6127.9
Sep25° / 24°467.8126.9
Oct26° / 25°15221.5124.9
Nov26° / 25°21025.7124.1
Dec27° / 25°17426.1124.1

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 27% of July, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
34060
43961
53961
63961
73862
83862
93862
103961
113961
123961
133961
143961
154060
163961
173961
183961
193961
203961
213961
224060
234060
244060
254159
264258
274258
284357
294357
304357
314357

Chance of precipitation in July

Any precipitation

São Tomé gets around 8 mm of rain over 2 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 7% and peaks near 10% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
110
29
39
49
59
69
79
88
98
108
118
128
138
148
157
167
177
187
197
206
216
226
235
245
254
264
274
284
294
304
314

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
115346
215445
315544
415643
515742
615742
715841
815841
915841
1015940
1115940
1216039
1326038
1426038
1526137
1626236
1726236
1826335
1926434
2026533
2126632
2226731
2326929
2427028
2527127
2627127
2727226
2827226
2927226
3017425
3117425

Wind in July

Winds average 20 km/h in July, the windiest month of the year.

Across July, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
420breezy
520breezy
620breezy
720breezy
820breezy
920breezy
1020breezy
1120breezy
1220breezy
1320breezy
1420breezy
1520breezy
1620breezy
1720breezy
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy
3120breezy

Sunrise & sunset in July

DaylightNight

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

Days grow by about 0 minutes over July. Sunrise moves from 5:36 AM to 5:39 AM, and sunset from 5:37 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:365:37
212.05:365:37
312.05:365:37
412.05:365:38
512.05:375:38
612.05:375:38
712.05:375:38
812.05:375:38
912.05:375:38
1012.05:375:39
1112.05:385:39
1212.05:385:39
1312.05:385:39
1412.05:385:39
1512.05:385:39
1612.05:385:39
1712.05:385:39
1812.05:385:39
1912.05:385:39
2012.05:395:40
2112.05:395:40
2212.05:395:40
2312.05:395:40
2412.05:395:40
2512.05:395:40
2612.05:395:40
2712.05:395:40
2812.05:395:40
2912.05:395:40
3012.05:395:40
3112.05:395:40

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.06 kWh/m².

For context, solar energy here swings from a low near 4.89 kWh/m² to a high of 5.48 kWh/m² in March across the year — July's 5.06 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in July

Hazard calendar for São Tomé

In seasonPeak

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

São Tomé's rainy season runs October–May, when most of the year's rain falls.

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

Is July a good time to visit São Tomé?

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

8.0
Sightseeing
1st-best month of the year
6.9
Beach & pool
1st-best month of the year

July is one of the better times to visit São Tomé for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Tomé in July

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

In July, São Tomé sees daytime highs around 24°C and nights near 24°C. Worth packing: light clothes, sun protection and a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near São Tomé in July

The nearest coast averages about 26°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 29°C and coldest in August 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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in São Tomé in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Tomé peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 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 highExtremeMar 21UV 14Aug 12UV 9
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul9Very high
Aug8Very high
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in São Tomé 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 São Tomé is worst in February — around 24 µg/m³ PM2.5 (moderate), about 4.6× the cleanest month (October, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodModerateFeb 1023 µg/m³Oct 175 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb24Moderate
Mar15Moderate
Apr11Good
May12Moderate
Jun16Moderate
Jul17Moderate
Aug13Moderate
Sep8Good
Oct5Good
Nov8Good
Dec15Moderate
Location & terrain

Where is São Tomé?

São Tomé sits at 0.3°N, 6.7°E, 140 m above sea level, in Sao Tome and Principe. The nearest listed city is Port-Gentil, 257 km away.

Topography around São Tomé

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

Within 3 km, the terrain around São Tomé has only modest variations in elevation — a maximum elevation change of 111 m around an average of 23 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,396 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,938 m.

The land around São Tomé is covered by water (43%), trees (31%) and artificial surfaces (24%) within 3 km, water (60%) and trees (36%) within 16 km, and water (90%) within 80 km.

3 km
111 m
16 km
1,396 m
80 km
1,938 m
treesgrasslandartificial surfaceswater
July weather nearby: Port-Gentil 257 km · Akanda 291 km · Libreville 303 km · Owendo 309 km · Ntoum 337 km · Bata 378 km · Lambaréné 407 km · Malabo 443 km

Sao Tome and Principe travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 61% of US
price level, 2025
GDP per capita
$4,084
2025
Safe drinking water
37%
of population, 2024
Homicide rate
3.2
per 100k, 2011
Road deaths
27.9
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Catholic 56%none 21%other 6%Adventist 4%

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 São Tomé (0.3376°, 6.7299°, elevation 140 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).