Challans in Spring
In spring (March, April and May), Challans sees average daytime highs around 15°C and overnight lows near 9°C, with 149 mm of rain over about 30 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 11°C in early March to 19°C by late May. The sky is clear or mostly clear about 26% of the time across spring, and the air most often feels dry.
Spring is Challans's 3rd-best season to visit on our travel score. For the whole year in context, see Challans's year-round climate.
- Avg daytime high
- 15°C
- 3rd-warmest season
- Avg overnight low
- 9°C
- Rainfall
- 149 mm
- 30 wet days
- Avg wind
- 18 km/h
- Travel score
- 4.4
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Challans in Spring
Over the season highs climb from about 11°C in early March to 19°C by late May.
A typical spring day in Challans reaches about 15°C and drops to 9°C overnight. The warmest of the three months is May, the coolest March.
Challans weather by month
How the three spring months (March, April and May) 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 | 9° / 6° | 71 | 11.7 | 8.8 | 1.9 |
| Feb | 10° / 5° | 53 | 9.6 | 10 | 2.1 |
| Mar | 12° / 7° | 50 | 10.2 | 11.6 | 3.2 |
| Apr | 14° / 9° | 47 | 10.1 | 13.3 | 4.3 |
| May | 18° / 12° | 52 | 9.9 | 14.8 | 5.6 |
| Jun | 20° / 15° | 39 | 8.3 | 15.6 | 6.5 |
| Jul | 22° / 16° | 37 | 8.1 | 15.3 | 7.2 |
| Aug | 22° / 16° | 43 | 7.6 | 14 | 7.3 |
| Sep | 20° / 14° | 52 | 8.1 | 12.4 | 6.7 |
| Oct | 17° / 12° | 76 | 12.1 | 10.6 | 5.0 |
| Nov | 13° / 9° | 81 | 12.6 | 9.2 | 3.3 |
| Dec | 10° / 6° | 81 | 12.4 | 8.4 | 2.2 |
Cloud cover in Spring
The sky is clear or mostly clear about 26% of the time across spring.
Chance of precipitation in Spring
Challans gets around 149 mm of rain over 30 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 18 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 42 min in early March to 15 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 4.7 kWh/m².
Is spring a good time to visit Challans?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Challans for sightseeing.
What to pack for Challans in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Challans sees daytime highs around 15°C and nights near 9°C. Worth packing: a warm layer, rain gear and sun protection. About 30 days see rain.
Sea temperature near Challans in Spring
The nearest coast averages about 12°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in August at about 19°C and coldest in February near 9°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 10 | 9 | 10 | 12 | 14 | 17 | 18 | 19 | 18 | 16 | 14 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 10 | Bracing |
| Feb | 9 | Bracing |
| Mar | 10 | Bracing |
| Apr | 12 | Bracing |
| May | 14 | Bracing |
| Jun | 17 | Cool |
| Jul | 18 | Cool |
| Aug | 19 | Cool |
| Sep | 18 | Cool |
| Oct | 16 | Cool |
| Nov | 14 | Bracing |
| Dec | 11 | Bracing |
UV index in Challans in Spring
Clear-sky midday UV across spring averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Challans peaks around August 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 6 | 7 | 7 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | High | High | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Challans?
Challans sits at 46.8°N, 1.9°W, 13 m above sea level, in France. The nearest listed city is Les Sables-d'Olonne, 39 km away.
Topography around Challans
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Challans.
Within 3 km, the terrain around Challans has only modest variations in elevation — a maximum elevation change of 44 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 84 m; within 80 km, significant variations in elevation — a maximum elevation change of 340 m.
The land around Challans is covered by grassland (37%), artificial surfaces (30%) and trees (26%) within 3 km, grassland (54%) and cropland (22%) within 16 km, and water (36%), grassland (26%) and cropland (22%) 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 Challans (46.8458°, -1.8794°, elevation 13 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.