Saint-Nazaire weather in July

In July, Saint-Nazaire sees average daytime highs of 22°C and overnight lows near 16°C, with 41 mm of rain across 7.8 wet days and about 15.3 hours of daylight. It is the 2nd-warmest and 11th-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 32% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 15 h 42 min at the start of July to 14 h 48 min by month's end. Set against the rest of the year, July is Saint-Nazaire's 2nd-clearest and 10th-windiest month. For the whole year in context, see Saint-Nazaire's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
16°
12th coldest
Rainfall
41 mm
7.8 wet days
Daylight
15 h 24 min
5:33 AM – 8:56 PM
Cloud cover
55%
2nd clearest
Wind
15 km/h
10th windiest
Solar energy
6.02 kWh/m²
Travel score
7.1
out of 10

Saint-Nazaire is commune in Loire-Atlantique, France.

Air quality
Good
PM2.5 8.2 µg/m³ · 2019
Density
1,433/km²
people per km²

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 Saint-Nazaire 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 18°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)
12115
22115
32116
42116
52116
62216
72216
82216
92216
102216
112216
122216
132216
142216
152216
162216
172216
182216
192216
202216
212216
222216
232316
242316
252316
262316
272316
282316
292316
302316
312316

Saint-Nazaire weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 7211.58.71.7
Feb / 549.29.92.0
Mar12° / 509.811.63.1
Apr14° / 5110.113.34.1
May17° / 12°5410.214.85.5
Jun20° / 14°418.615.76.5
Jul22° / 16°417.815.37.1
Aug22° / 16°457.9147.1
Sep20° / 14°527.812.46.6
Oct16° / 11°7611.610.64.9
Nov12° / 7611.79.13.1
Dec10° / 8112.38.32.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
35050
45050
55149
65149
75248
85248
95347
105446
115446
125545
135545
145545
155545
165644
175545
185545
195545
205446
215446
225446
235446
245446
255446
265347
275347
285347
295347
305347
315446

Chance of precipitation in July

Any precipitation

Saint-Nazaire gets around 41 mm of rain over 7.8 wet days in July. 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 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
229
329
428
528
628
727
826
926
1025
1124
1223
1323
1422
1522
1621
1721
1821
1922
2022
2122
2222
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. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12550214
22450224
32351224
42252233
52152243
62151253
72151262
82051272
92050282
102050292
111949292
121949302
131848312
141847322
151747343
161646353
171645363
181545374
191444384
201344394
211243405
221143405
231143416
241043416
251042416
261042427
27942427
28942427
29941428
30941428
31941428

Wind in July

Winds average 15 km/h in July.

Across July, daily wind ranges from about 14 km/h on the calmest days to 15 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
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 42 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 54 minutes over July. Sunrise moves from 5:22 AM to 5:50 AM, and sunset from 9:03 PM to 8:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.75:229:03
215.75:229:03
315.75:239:02
415.65:239:02
515.65:249:02
615.65:259:01
715.65:259:01
815.65:269:01
915.65:279:00
1015.55:289:00
1115.55:298:59
1215.55:308:59
1315.55:308:58
1415.45:318:57
1515.45:328:56
1615.45:338:56
1715.35:348:55
1815.35:358:54
1915.35:368:53
2015.25:378:52
2115.25:388:51
2215.25:408:50
2315.15:418:49
2415.15:428:48
2515.15:438:47
2615.05:448:46
2715.05:458:45
2815.05:468:44
2914.95:488:42
3014.95:498:41
3114.85:508:40

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.02 kWh/m².

For context, solar energy here swings from a low near 0.99 kWh/m² to a high of 6.18 kWh/m² in June across the year — July's 6.02 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.0Intense
216.0Intense
226.0Intense
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in July

Is July a good time to visit Saint-Nazaire?

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

7.1
Sightseeing
1st-best month of the year
5.0
Beach & pool
2nd-best month of the year

July is one of the better times to visit Saint-Nazaire for general sightseeing.

What to pack for Saint-Nazaire in July

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

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

sun protectionlight clothes

Sea temperature near Saint-Nazaire 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 18 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
Sep17Cool
Oct16Cool
Nov14Bracing
Dec11Bracing

UV index in Saint-Nazaire 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 Saint-Nazaire peaks around August 10 at about 7 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 10UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May6High
Jun7High
Jul7High
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Nazaire?

Saint-Nazaire sits at 47.3°N, 2.2°W, 12 m above sea level, in France. The nearest listed city is La Baule-Escoublac, 11 km away.

Topography around Saint-Nazaire

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Nazaire.

Within 3 km, the terrain around Saint-Nazaire has only modest variations in elevation — a maximum elevation change of 37 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 293 m.

The land around Saint-Nazaire is covered by artificial surfaces (36%) and water (36%) within 3 km, water (32%) and grassland (27%) within 16 km, and water (34%), grassland (25%) and cropland (21%) within 80 km.

3 km
37 m
16 km
119 m
80 km
293 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: La Baule-Escoublac 11 km · Guérande 17 km · Couëron 38 km · Saint-Herblain 43 km · Orvault 45 km · Bouguenais 46 km · Rezé 50 km · La Chapelle-sur-Erdre 50 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 Saint-Nazaire (47.2751°, -2.2179°, elevation 12 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).