Dax in Summer
In summer (June, July and August), Dax sees average daytime highs around 26°C and overnight lows near 16°C, with 174 mm of rain over about 26 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 23°C in early June to 27°C by late August. The sky is clear or mostly clear about 37% of the time across summer, and the air most often feels humid.
Summer is Dax's best season of the year to visit on our travel score. For the whole year in context, see Dax's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 16°C
- Rainfall
- 174 mm
- 26 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.9
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Dax in Summer
Over the season highs climb from about 23°C in early June to 27°C by late August.
A typical summer day in Dax reaches about 26°C and drops to 16°C overnight. The warmest of the three months is August, the coolest June.
Dax 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 | 11° / 4° | 87 | 12.4 | 9.1 | 2.7 |
| Feb | 13° / 4° | 74 | 10.7 | 10.2 | 3.3 |
| Mar | 16° / 6° | 75 | 12 | 11.6 | 4.8 |
| Apr | 18° / 8° | 90 | 13.4 | 13.2 | 5.4 |
| May | 21° / 12° | 81 | 12.7 | 14.5 | 6.1 |
| Jun | 25° / 15° | 66 | 9.2 | 15.2 | 6.9 |
| Jul | 27° / 17° | 51 | 8.6 | 14.9 | 6.9 |
| Aug | 27° / 17° | 57 | 8.5 | 13.8 | 6.9 |
| Sep | 25° / 14° | 66 | 9.2 | 12.3 | 7.0 |
| Oct | 20° / 11° | 83 | 11.3 | 10.8 | 6.1 |
| Nov | 15° / 7° | 105 | 13.6 | 9.5 | 4.1 |
| Dec | 12° / 5° | 91 | 12.8 | 8.8 | 2.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 37% of the time across summer.
Chance of precipitation in Summer
Dax gets around 174 mm of rain over 26 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — 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 15 hours in early June to 13 h 06 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 5.9 kWh/m².
Is summer a good time to visit Dax?
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 a reasonable time to visit Dax for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Dax in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Dax sees daytime highs around 26°C and nights near 16°C. Pack light clothes and sun protection. Worth having: rain gear. About 26 days see rain.
Sea temperature near Dax in Summer
The nearest coast averages about 21°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 32 km away) is warmest in August at about 22°C and coldest in February near 12°C.
It's comfortable for a long swim from Jul 3 to Sep 23 — about 2.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 13 | 12 | 12 | 14 | 16 | 19 | 21 | 22 | 21 | 18 | 16 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 13 | Bracing |
| Feb | 12 | Bracing |
| Mar | 12 | Bracing |
| Apr | 14 | Bracing |
| May | 16 | Cool |
| Jun | 19 | Cool |
| Jul | 21 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 18 | Cool |
| Nov | 16 | Cool |
| Dec | 14 | Bracing |
UV index in Dax in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dax peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (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) | 1 | 2 | 4 | 6 | 6 | 8 | 8 | 8 | 5 | 4 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Dax?
Dax sits at 43.7°N, 1.1°W, 16 m above sea level, in France. The nearest listed city is Bayonne, 42 km away.
Topography around Dax
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dax.
Within 3 km, the terrain around Dax has only modest variations in elevation — a maximum elevation change of 48 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 168 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,044 m.
The land around Dax is covered by trees (37%), artificial surfaces (33%) and grassland (20%) within 3 km, trees (52%), cropland (24%) and grassland (21%) within 16 km, and trees (45%) and grassland (20%) within 80 km.
France travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 77% of US
- price level, 2025
- GDP per capita
- $48,986
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.3
- per 100k, 2023
- Road deaths
- 5.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 539
- 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 Dax (43.7103°, -1.0537°, elevation 16 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.