Challans weather in July

In July, Challans sees average daytime highs of 22°C and overnight lows near 16°C, with 37 mm of rain across 8.1 wet days and about 15.3 hours of daylight. It is the 2nd-warmest and 12th-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 35% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 15 h 36 min at the start of July to 14 h 48 min by month's end. Set against the rest of the year, July is Challans's 2nd-clearest and 10th-windiest month. For the whole year in context, see Challans's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
16°
12th coldest
Rainfall
37 mm
8.1 wet days
Daylight
15 h 18 min
5:33 AM – 8:53 PM
Cloud cover
53%
2nd clearest
Wind
16 km/h
10th windiest
Solar energy
6.18 kWh/m²
Travel score
7.2
out of 10

Challans is human settlement in France.

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

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

A typical July 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, July runs about 2°C warmer than June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12216
22216
32216
42216
52216
62216
72216
82216
92216
102216
112216
122216
132216
142216
152216
162216
172216
182316
192316
202316
212317
222317
232317
242317
252317
262317
272317
282317
292317
302317
312317

Challans weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 12th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35347
45347
55347
65446
75446
85545
95644
105644
115743
125743
135842
145842
155842
165842
175941
185941
195941
205842
215743
225743
235743
245743
255743
265644
275644
285644
295644
305644
315644

Chance of precipitation in July

Any precipitation

Challans gets around 37 mm of rain over 8.1 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
229
329
429
530
629
729
829
928
1027
1126
1225
1324
1424
1523
1623
1722
1822
1922
2022
2122
2223
2323
2423
2523
2623
2723
2823
2924
3024
3124

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the comfortable band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
122492450
221502540
320512540
420502640
519512640
619512730
719512730
818512830
918512830
1018502930
1118503030
1218493130
1317483230
1417473240
1517463340
1616453450
1716453550
1815443560
1914433660
2013433770
2113423880
2212423880
2312413990
2411413990
2511413990
26104139100
27104139100
2894139110
2994139110
3094139110
3194139111

Wind in July

Winds average 16 km/h in July.

Across July, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1416light 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
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 36 min at the start of July to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over July. Sunrise moves from 5:22 AM to 5:50 AM, and sunset from 9:00 PM to 8:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.65:229:00
215.65:238:59
315.65:238:59
415.65:248:59
515.65:248:59
615.65:258:58
715.55:268:58
815.55:278:58
915.55:278:57
1015.55:288:57
1115.55:298:56
1215.45:308:56
1315.45:318:55
1415.45:328:54
1515.35:338:54
1615.35:338:53
1715.35:348:52
1815.35:358:51
1915.25:368:50
2015.25:388:49
2115.25:398:48
2215.15:408:47
2315.15:418:46
2415.15:428:45
2515.05:438:44
2615.05:448:43
2714.95:458:42
2814.95:468:41
2914.95:488:40
3014.85:498:38
3114.85:508:37

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.18 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 — July's 6.18 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.1Intense
256.1Intense
266.1Intense
276.0Intense
286.0Intense
296.0Bright
306.0Bright
315.9Bright
Planning a trip in July

Is July a good time to visit Challans?

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

7.2
Sightseeing
2nd-best month of the year
5.1
Beach & pool
2nd-best month of the year

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

What to pack for Challans in July

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

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

sun protectionlight clothesrain gear

Sea temperature near Challans in July

The nearest coast averages about 18°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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
July 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).