Challans weather in August

In August, Challans sees average daytime highs of 22°C and overnight lows near 16°C, with 43 mm of rain across 7.6 wet days and about 14 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 37% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Challans's 1st-clearest and 12th-windiest month. For the whole year in context, see Challans's year-round climate.

Daytime high
22°
1st warmest
Overnight low
16°
12th coldest
Rainfall
43 mm
7.6 wet days
Daylight
14 hours
6:11 AM – 8:13 PM
Cloud cover
51%
1st clearest
Wind
16 km/h
12th windiest
Solar energy
5.42 kWh/m²
Travel score
7.3
out of 10

Challans is human settlement in France.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical August day in Challans reaches about 22°C in the afternoon and slips back to 16°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62317
72317
82317
92317
102317
112317
122316
132316
142316
152316
162316
172316
182316
192216
202216
212216
222216
232216
242216
252216
262216
272216
282216
292216
302216
312215

Challans weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 7111.78.81.9
Feb10° / 539.6102.1
Mar12° / 5010.211.63.2
Apr14° / 4710.113.34.3
May18° / 12°529.914.85.6
Jun20° / 15°398.315.66.5
Jul22° / 16°378.115.37.2
Aug22° / 16°437.6147.3
Sep20° / 14°528.112.46.7
Oct17° / 12°7612.110.65.0
Nov13° / 8112.69.23.3
Dec10° / 8112.48.42.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35743
45842
55842
65941
75941
85941
95941
105941
115941
125941
135941
145941
155842
165842
175842
185743
195743
205644
215644
225743
235743
245743
255743
265743
275842
285842
295842
305842
315842

Chance of precipitation in August

Any precipitation

Challans gets around 43 mm of rain over 7.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
224
324
424
524
624
724
824
924
1024
1124
1224
1324
1424
1524
1624
1724
1824
1925
2025
2125
2225
2324
2424
2524
2624
2723
2823
2922
3022
3122

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
194139111
294138111
394138111
494137111
5104136111
6104136112
7104235112
8104235112
9104234112
10114234112
11114334112
12114334112
13114333112
14114333111
15114433111
16114433111
17124433111
18124433111
19124333111
20134333110
21144333110
22154232100
23164232100
24184231100
2519413090
2621412990
2722412980
2824402880
2925402780
3026402770
3128402660

Wind in August

Winds average 16 km/h in August, the calmest month.

Across August, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 42 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 5:51 AM to 6:31 AM, and sunset from 8:36 PM to 7:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:518:36
214.75:538:34
314.75:548:33
414.65:558:32
514.65:568:30
614.55:588:29
714.55:598:27
814.46:008:26
914.46:018:24
1014.36:038:23
1114.36:048:21
1214.26:058:19
1314.26:078:18
1414.16:088:16
1514.16:098:14
1614.06:118:13
1714.06:128:11
1813.96:138:09
1913.96:158:07
2013.86:168:06
2113.86:178:04
2213.76:198:02
2313.76:208:00
2413.66:217:58
2513.66:237:56
2613.56:247:54
2713.56:257:52
2813.46:277:50
2913.36:287:49
3013.36:297:47
3113.26:317:45

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.42 kWh/m².

For context, solar energy here swings from a low near 1.04 kWh/m² to a high of 6.28 kWh/m² in June across the year — August's 5.42 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in August

Is August a good time to visit Challans?

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

7.3
Sightseeing
1st-best month of the year
5.3
Beach & pool
1st-best month of the year

August is one of the better times to visit Challans for general sightseeing.

What to pack for Challans in August

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

In August, Challans sees daytime highs around 22°C and nights near 16°C. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Challans in August

The nearest coast averages about 19°C in August — 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.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar10Bracing
Apr12Bracing
May14Bracing
Jun17Cool
Jul18Cool
Aug19Cool
Sep18Cool
Oct16Cool
Nov14Bracing
Dec11Bracing

UV index in Challans in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowAug 10UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun7High
Jul7High
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

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.

3 km
44 m
16 km
84 m
80 km
340 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Les Sables-d'Olonne 39 km · La Roche-sur-Yon 40 km · Bouguenais 42 km · Couëron 43 km · Saint-Herblain 44 km · Rezé 45 km · Vertou 47 km · Nantes 48 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
Roman Catholic 47%none 33%Muslim 4%Protestant 2%

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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).