Chaves in Summer
In summer (June, July and August), Chaves sees average daytime highs around 26°C and overnight lows near 13°C, with 70 mm of rain over about 13 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 22°C in early June to 26°C by late August. The sky is clear or mostly clear about 60% of the time across summer, and the air most often feels dry.
Summer is Chaves's best season of the year to visit on our travel score. For the whole year in context, see Chaves's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 70 mm
- 13 wet days
- Avg wind
- 8 km/h
- Travel score
- 8.0
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Chaves in Summer
Over the season highs climb from about 22°C in early June to 26°C by late August.
A typical summer day in Chaves reaches about 26°C and drops to 13°C overnight. The warmest of the three months is July, the coolest June.
Chaves 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 | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 3° | 87 | 9.6 | 1 | 9.3 | 1.9 |
| Feb | 11° / 3° | 59 | 7.5 | 0.9 | 10.3 | 2.8 |
| Mar | 14° / 5° | 74 | 9.2 | 0.1 | 11.7 | 4.2 |
| Apr | 16° / 6° | 73 | 10.9 | 0 | 13.1 | 4.8 |
| May | 19° / 9° | 68 | 10.1 | 0 | 14.3 | 6.1 |
| Jun | 23° / 12° | 33 | 5.5 | 0 | 15 | 7.8 |
| Jul | 27° / 14° | 18 | 3.4 | 0 | 14.7 | 8.2 |
| Aug | 27° / 14° | 19 | 4 | 0 | 13.7 | 8.0 |
| Sep | 23° / 12° | 42 | 5.9 | 0 | 12.3 | 7.7 |
| Oct | 18° / 9° | 110 | 10.2 | 0 | 10.9 | 5.6 |
| Nov | 12° / 5° | 90 | 10.8 | 0.1 | 9.6 | 3.3 |
| Dec | 10° / 3° | 97 | 9.3 | 0.4 | 9 | 2.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 60% of the time across summer.
Chance of precipitation in Summer
Chaves gets around 70 mm of rain over 13 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 48 min in early June to 13 hours 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 6.9 kWh/m².
Is summer a good time to visit Chaves?
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 Chaves for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Chaves in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Chaves sees daytime highs around 26°C and nights near 13°C. Pack sun protection. Worth having: light clothes. About 13 days see rain.
UV index in Chaves in Summer
Clear-sky midday UV across summer averages 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 Chaves peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 7 | 9 | 9 | 9 | 6 | 5 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 5 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Chaves 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 Chaves is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 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) | 10 | 11 | 14 | 12 | 8 | 9 | 18 | 14 | 18 | 14 | 7 | 7 |
| Level | Good | Good | Moderate | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 14 | Moderate |
| Apr | 12 | Good |
| May | 8 | Good |
| Jun | 9 | Good |
| Jul | 18 | Moderate |
| Aug | 14 | Moderate |
| Sep | 18 | Moderate |
| Oct | 14 | Moderate |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is Chaves?
Chaves sits at 41.7°N, 7.5°W, 362 m above sea level, in Portugal. The nearest listed city is Cabeceiras de Basto, 50 km away.
Topography around Chaves
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chaves.
Within 3 km, the terrain around Chaves has only modest variations in elevation — a maximum elevation change of 145 m around an average of 378 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 839 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,082 m.
The land around Chaves is covered by grassland (34%), cropland (22%) and artificial surfaces (22%) within 3 km, grassland (53%) and trees (33%) within 16 km, and trees (45%) and grassland (45%) within 80 km.
Portugal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $32,082
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 95%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2022
- Road deaths
- 8.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 612
- 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 Chaves (41.7402°, -7.4688°, elevation 362 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.