Dieppe weather in August

In August, Dieppe sees average daytime highs of 20°C and overnight lows near 15°C, with 69 mm of rain across 11.1 wet days and about 14.3 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 27% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 h 06 min at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Dieppe's 2nd-clearest and 12th-windiest month. For the whole year in context, see Dieppe's year-round climate.

Daytime high
20°
1st warmest
Overnight low
15°
12th coldest
Rainfall
69 mm
11.1 wet days
Daylight
14 h 18 min
5:52 AM – 8:08 PM
Cloud cover
59%
2nd clearest
Wind
17 km/h
12th windiest
Solar energy
4.97 kWh/m²
Travel score
6.2
out of 10
Air quality
Moderate
PM2.5 11.3 µg/m³ · 2019

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 20°C through the month.

A typical August day in Dieppe reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12116
22116
32116
42116
52116
62116
72116
82116
92116
102116
112116
122116
132116
142116
152015
162015
172015
182015
192015
202015
212015
222015
232015
242015
252015
262015
272015
282015
292015
302015
311915

How August really feels in Dieppe

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.

Dieppe weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7413.20.78.41.0
Feb / 6112.30.89.71.1
Mar10° / 5811.60.511.52.1
Apr12° / 55110.113.53.2
May15° / 10°6111.3015.14.4
Jun18° / 13°5810.40165.6
Jul20° / 15°5410.5015.76.3
Aug20° / 15°6911.1014.36.2
Sep18° / 13°6311012.45.7
Oct15° / 11°8914.4010.54.0
Nov11° / 9315.70.18.82.3
Dec / 10014.90.781.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55149
65149
75149
85149
95050
104951
114951
124951
134951
144852
154753
164753
174753
184555
194555
204555
214555
224555
234555
244555
254555
264654
274654
284654
294654
304654
314654

Chance of precipitation in August

Any precipitation

Dieppe gets around 69 mm of rain over 11.1 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
235
335
435
535
635
735
836
936
1036
1136
1236
1337
1437
1537
1637
1738
1838
1938
2037
2137
2237
2336
2436
2535
2635
2734
2834
2933
3033
3133

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11958230
21958230
31958230
42056231
52056231
62056231
72155231
82254231
92254231
102353231
112353231
122452231
132453221
142552221
152552221
162651221
172651221
182751211
192751211
202850211
212950201
223149201
233248191
243447191
253646180
263745170
273944170
284043160
294242160
304341150
314540150

Wind in August

Winds average 17 km/h in August, the calmest month.

Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 06 min at the start of August to 13 h 24 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 5:30 AM to 6:14 AM, and sunset from 8:34 PM to 7:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.15:308:34
215.05:318:32
315.05:328:31
414.95:348:29
514.95:358:28
614.85:378:26
714.85:388:24
814.75:408:23
914.75:418:21
1014.65:438:19
1114.65:448:17
1214.55:468:15
1314.45:478:14
1414.45:498:12
1514.35:508:10
1614.35:528:08
1714.25:538:06
1814.25:558:04
1914.15:568:02
2014.05:588:00
2114.05:597:58
2213.96:017:56
2313.96:027:54
2413.86:047:52
2513.76:057:50
2613.76:077:48
2713.66:087:46
2813.66:107:43
2913.56:117:41
3013.46:137:39
3113.46:147:37

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.97 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 6.06 kWh/m² in June across the year — August's 4.97 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.3Bright
314.3Bright
Planning a trip in August

Is August a good time to visit Dieppe?

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

6.2
Sightseeing
2nd-best month of the year
3.4
Beach & pool
1st-best month of the year

August is a reasonable time to visit Dieppe for sightseeing.

What to pack for Dieppe in August

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

In August, Dieppe sees daytime highs around 20°C and nights near 15°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Dieppe in August

The nearest coast averages about 18°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 15 km away) is warmest in August at about 18°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
Jan8Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Dieppe 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 Dieppe peaks around June 19 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 19UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Dieppe 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 Dieppe is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Dieppe's WHO annual average of 11.3 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2415 µg/m³Nov 168 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar15Moderate
Apr15Moderate
May14Moderate
Jun12Moderate
Jul11Good
Aug11Good
Sep11Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Dieppe?

Dieppe sits at 49.9°N, 1.1°E, 9 m above sea level, in France. The nearest listed city is Mont-Saint-Aignan, 51 km away.

Topography around Dieppe

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

Within 3 km, the terrain around Dieppe has only modest variations in elevation — a maximum elevation change of 101 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 265 m.

The land around Dieppe is covered by water (34%) and artificial surfaces (24%) within 3 km, water (43%) and cropland (29%) within 16 km, and cropland (38%) and water (29%) within 80 km.

3 km
101 m
16 km
191 m
80 km
265 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Mont-Saint-Aignan 51 km · Rouen 53 km · Fécamp 54 km · Canteleu 54 km · Le Petit-Quevilly 57 km · Sotteville-lès-Rouen 57 km · Abbeville 58 km · Le Grand-Quevilly 58 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 Dieppe (49.9216°, 1.0777°, elevation 9 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).