Hérouville-Saint-Clair weather in August

In August, Hérouville-Saint-Clair sees average daytime highs of 23°C and overnight lows near 14°C, with 60 mm of rain across 10.1 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 20% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 hours at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Hérouville-Saint-Clair's 2nd-clearest and 12th-windiest month. For the whole year in context, see Hérouville-Saint-Clair's year-round climate.

Daytime high
23°
2nd warmest
Overnight low
14°
12th coldest
Rainfall
60 mm
10.1 wet days
Daylight
14 h 12 min
5:59 AM – 8:12 PM
Cloud cover
64%
2nd clearest
Wind
12 km/h
12th windiest
Solar energy
4.78 kWh/m²
Travel score
6.7
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical August day in Hérouville-Saint-Clair reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52415
62415
72415
82315
92315
102315
112315
122315
132315
142315
152314
162314
172314
182314
192314
202314
212314
222314
232214
242214
252214
262214
272214
282214
292213
302213
312213

How August really feels in Hérouville-Saint-Clair

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hérouville-Saint-Clair weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5911.50.58.51.3
Feb / 5111.10.89.81.6
Mar12° / 5411.30.411.62.9
Apr15° / 5611.70.113.44.1
May18° / 10°5811.4015.15.3
Jun21° / 12°6210.5015.96.1
Jul23° / 14°5510.9015.66.6
Aug23° / 14°6010.1014.26.7
Sep20° / 12°539.7012.46.2
Oct16° / 6512.3010.54.6
Nov11° / 6612.808.92.6
Dec / 7413.30.58.11.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
44060
54060
63961
73961
83961
93961
103862
113763
123763
133763
143763
153763
163763
173763
183664
193664
203664
213664
223664
233664
243664
253664
263664
273664
283664
293862
303862
313862

Chance of precipitation in August

Any precipitation

Hérouville-Saint-Clair gets around 60 mm of rain over 10.1 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 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
433
532
633
733
833
933
1033
1133
1233
1333
1433
1533
1633
1733
1834
1934
2034
2133
2233
2333
2432
2532
2631
2731
2831
2930
3030
3129

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 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12851192
22850202
32850202
42950202
52949202
62949202
72949202
83048202
93048202
103048202
113148202
123147192
133247192
143247192
153347182
163347182
173447182
183447172
193546172
203646172
213746162
223845162
233944152
244143142
254243141
264442131
274541131
284640121
294840111
304939111
315039101

Wind in August

Winds average 12 km/h in August, the calmest month.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 hours at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over August. Sunrise moves from 5:38 AM to 6:21 AM, and sunset from 8:37 PM to 7:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.05:388:37
214.95:398:36
314.95:408:34
414.85:428:32
514.85:438:31
614.75:448:29
714.75:468:28
814.65:478:26
914.65:498:24
1014.55:508:23
1114.55:528:21
1214.45:538:19
1314.45:548:17
1414.35:568:15
1514.35:578:14
1614.25:598:12
1714.26:008:10
1814.16:028:08
1914.06:038:06
2014.06:058:04
2113.96:068:02
2213.96:088:00
2313.86:097:58
2413.86:117:56
2513.76:127:54
2613.66:147:52
2713.66:157:50
2813.56:177:48
2913.56:187:46
3013.46:207:44
3113.36:217:42

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.78 kWh/m².

For context, solar energy here swings from a low near 0.81 kWh/m² to a high of 5.83 kWh/m² in June across the year — August's 4.78 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.3Bright
304.2Bright
314.2Bright
Planning a trip in August

Is August a good time to visit Hérouville-Saint-Clair?

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

6.7
Sightseeing
1st-best month of the year
5.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Hérouville-Saint-Clair for sightseeing.

What to pack for Hérouville-Saint-Clair in August

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

In August, Hérouville-Saint-Clair sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Hérouville-Saint-Clair 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 8°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug19Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Hérouville-Saint-Clair 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 Hérouville-Saint-Clair peaks around June 18 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Hérouville-Saint-Clair in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Hérouville-Saint-Clair is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1515 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun12Moderate
Jul10Good
Aug11Good
Sep10Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Hérouville-Saint-Clair?

Hérouville-Saint-Clair sits at 49.2°N, 0.3°W, 5 m above sea level, in France. The nearest listed city is Caen, 5.0 km away.

Topography around Hérouville-Saint-Clair

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

Within 3 km, the terrain around Hérouville-Saint-Clair has only modest variations in elevation — a maximum elevation change of 92 m around an average of 27 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 164 m; within 80 km, significant variations in elevation — a maximum elevation change of 459 m.

The land around Hérouville-Saint-Clair is covered by artificial surfaces (30%), cropland (27%) and trees (23%) within 3 km, cropland (43%) and grassland (20%) within 16 km, and grassland (30%), cropland (29%) and water (23%) within 80 km.

3 km
92 m
16 km
164 m
80 km
459 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Caen 5.0 km · Bayeux 30 km · Deauville 32 km · Lisieux 40 km · Le Havre 43 km · Montivilliers 52 km · Argentan 56 km · Flers 56 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 Hérouville-Saint-Clair (49.2109°, -0.3065°, elevation 5 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).