San Bartolomé in Summer
In summer (June, July and August), San Bartolomé sees average daytime highs around 21°C and overnight lows near 20°C, with 0 mm of rain over about 0 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Over the season highs climb from about 20°C in early June to 23°C by late August. The sky is clear or mostly clear about 60% of the time across summer, and the air most often feels muggy.
Summer is San Bartolomé's best season of the year to visit on our travel score. San Bartolomé has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see San Bartolomé's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 20°C
- Rainfall
- 0 mm
- 0 wet days
- Avg wind
- 29 km/h
- Travel score
- 8.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in San Bartolomé in Summer
Over the season highs climb from about 20°C in early June to 23°C by late August.
A typical summer day in San Bartolomé reaches about 21°C and drops to 20°C overnight. The warmest of the three months is August, the coolest June.
San Bartolomé weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 18° / 17° | 12 | 2.3 | 10.4 | 7.1 |
| Feb | 18° / 16° | 12 | 2.5 | 11 | 6.9 |
| Mar | 18° / 17° | 9 | 1.8 | 11.8 | 7.2 |
| Apr | 18° / 17° | 3 | 0.8 | 12.7 | 7.5 |
| May | 19° / 18° | 1 | 0.3 | 13.4 | 7.7 |
| Jun | 20° / 19° | 0 | 0.1 | 13.8 | 8.1 |
| Jul | 21° / 21° | 0 | 0 | 13.7 | 8.5 |
| Aug | 22° / 21° | 0 | 0 | 13 | 8.8 |
| Sep | 23° / 22° | 3 | 0.4 | 12.2 | 8.7 |
| Oct | 22° / 21° | 11 | 1.8 | 11.3 | 8.3 |
| Nov | 21° / 20° | 12 | 2.2 | 10.6 | 7.7 |
| Dec | 19° / 18° | 19 | 2.8 | 10.2 | 7.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 60% of the time across summer.
Chance of precipitation in Summer
San Bartolomé gets around 0 mm of rain over 0 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 29 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 42 min in early June to 12 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.0 kWh/m².
Hazard calendar for San Bartolomé
In summer, San Bartolomé overlaps its dust season. The full year is below, with each hazard's peak months called out.
San Bartolomé sees seasonal dust haze (July–August), heaviest in July.
Is summer a good time to visit San Bartolomé?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit San Bartolomé for general sightseeing.
What to pack for San Bartolomé in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Bartolomé sees daytime highs around 21°C and nights near 20°C. Pack sun protection and a windbreaker. Worth having: light clothes.
Sea temperature near San Bartolomé in Summer
The nearest coast averages about 22°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in September at about 23°C and coldest in March near 18°C.
It's comfortable for a long swim from May 29 to Dec 19 — about 6.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 18 | 18 | 19 | 20 | 21 | 22 | 22 | 23 | 23 | 22 | 20 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 18 | Cool |
| Mar | 18 | Cool |
| Apr | 19 | Cool |
| May | 20 | Cool |
| Jun | 21 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 23 | Refreshing |
| Nov | 22 | Refreshing |
| Dec | 20 | Refreshing |
UV index in San Bartolomé in Summer
Clear-sky midday UV across summer averages around 10 (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 Bartolomé peaks around July 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 5 | 9 | 10 | 9 | 10 | 11 | 10 | 8 | 8 | 4 | 3 |
| Level | Moderate | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Very high | Very high | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | High |
| Mar | 9 | Very high |
| Apr | 10 | Very high |
| May | 9 | Very high |
| Jun | 10 | Very high |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in San Bartolomé in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in San Bartolomé is worst in February — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (June, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 17 | 11 | 8 | 8 | 7 | 10 | 11 | 8 | 10 | 8 | 14 |
| Level | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 17 | Moderate |
| Mar | 11 | Good |
| Apr | 8 | Good |
| May | 8 | Good |
| Jun | 7 | Good |
| Jul | 10 | Good |
| Aug | 11 | Good |
| Sep | 8 | Good |
| Oct | 10 | Good |
| Nov | 8 | Good |
| Dec | 14 | Moderate |
Where is San Bartolomé?
San Bartolomé sits at 29.0°N, 13.6°W, 275 m above sea level, in Spain. The nearest listed city is Tías, 5.0 km away.
Topography around San Bartolomé
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Bartolomé.
Within 3 km, the terrain around San Bartolomé has significant variations in elevation — a maximum elevation change of 426 m around an average of 246 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 668 m; within 80 km, large variations in elevation — a maximum elevation change of 669 m.
The land around San Bartolomé is covered by grassland (62%) and bare terrain (22%) within 3 km, water (35%), bare terrain (31%) and grassland (28%) within 16 km, and water (84%) within 80 km.
Spain travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $38,627
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 3.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 540
- Religion
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 Bartolomé (29.0009°, -13.613°, elevation 275 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.