Saint-Brieuc weather in August

In August, Saint-Brieuc sees average daytime highs of 21°C and overnight lows near 14°C, with 49 mm of rain across 9.5 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 23% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Saint-Brieuc's 3rd-clearest and 12th-windiest month. For the whole year in context, see Saint-Brieuc's year-round climate.

Daytime high
21°
1st warmest
Overnight low
14°
12th coldest
Rainfall
49 mm
9.5 wet days
Daylight
14 h 12 min
6:10 AM – 8:20 PM
Cloud cover
64%
3rd clearest
Wind
13 km/h
12th windiest
Solar energy
4.82 kWh/m²
Travel score
6.5
out of 10
Air quality
Good
PM10 15.4 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 21°C through the month.

A typical August day in Saint-Brieuc reaches about 21°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°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)
12214
22214
32214
42214
52214
62214
72214
82214
92214
102214
112214
122214
132114
142114
152114
162114
172114
182114
192114
202114
212113
222113
232113
242113
252113
262113
272113
282113
292113
302013
312013

How August really feels in Saint-Brieuc

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.

Saint-Brieuc 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 daysSnow daysDaylight (hours)Travel score
Jan / 6011.40.38.61.5
Feb / 5311.10.59.91.7
Mar11° / 5110.70.311.62.7
Apr13° / 5711.8013.43.6
May16° / 62110154.9
Jun19° / 12°569.5015.86.0
Jul21° / 13°469.1015.56.6
Aug21° / 14°499.5014.16.5
Sep19° / 12°489012.46.1
Oct16° / 10°6812.1010.64.5
Nov12° / 6412.6092.8
Dec / 7113.10.58.21.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% 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 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
44060
54060
64159
74159
84159
94159
104258
114258
124258
134258
144258
154258
164159
174060
184060
193961
203862
213862
223862
233862
243862
253862
263862
274060
284060
294060
304159
314357

Chance of precipitation in August

Any precipitation

Saint-Brieuc gets around 49 mm of rain over 9.5 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
630
730
830
930
1030
1130
1230
1330
1430
1530
1630
1731
1831
1931
2031
2131
2231
2331
2430
2530
2629
2729
2828
2927
3027
3126

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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12652211
22751211
32751211
42849212
52948222
62948222
73047212
83047212
93047212
103147212
113147212
123147202
133247202
143247192
153247192
163248182
173348182
183348171
193349171
203449171
213548161
223648161
233747151
243946141
254045141
264245131
274344121
284443121
294542111
304742111
314841101

Wind in August

Winds average 13 km/h in August, the calmest month.

Across August, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 54 min 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 96 minutes over August. Sunrise moves from 5:50 AM to 6:32 AM, and sunset from 8:45 PM to 7:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.95:508:45
214.95:518:43
314.85:528:42
414.85:548:40
514.75:558:39
614.75:568:37
714.65:588:35
814.65:598:34
914.56:018:32
1014.56:028:31
1114.46:038:29
1214.46:058:27
1314.36:068:25
1414.36:088:24
1514.26:098:22
1614.26:108:20
1714.16:128:18
1814.16:138:16
1914.06:158:14
2013.96:168:12
2113.96:178:11
2213.86:198:09
2313.86:208:07
2413.76:228:05
2513.76:238:03
2613.66:258:01
2713.56:267:59
2813.56:287:57
2913.46:297:55
3013.46:307:52
3113.36:327:50

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.82 kWh/m².

For context, solar energy here swings from a low near 0.88 kWh/m² to a high of 5.86 kWh/m² in June across the year — August's 4.82 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
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
314.3Bright
Planning a trip in August

Is August a good time to visit Saint-Brieuc?

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

6.5
Sightseeing
2nd-best month of the year
4.1
Beach & pool
1st-best month of the year

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

What to pack for Saint-Brieuc in August

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

In August, Saint-Brieuc sees daytime highs around 21°C and nights near 14°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Saint-Brieuc 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 16 km away) is warmest in August at about 18°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°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar9Bracing
Apr10Bracing
May12Bracing
Jun14Bracing
Jul16Cool
Aug18Cool
Sep18Cool
Oct16Cool
Nov14Bracing
Dec12Bracing

UV index in Saint-Brieuc 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 Saint-Brieuc 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 19UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Saint-Brieuc?

Saint-Brieuc sits at 48.5°N, 2.8°W, 96 m above sea level, in France. The nearest listed city is Pontivy, 52 km away.

Topography around Saint-Brieuc

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

Within 3 km, the terrain around Saint-Brieuc has only modest variations in elevation — a maximum elevation change of 141 m around an average of 92 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 275 m; within 80 km, significant variations in elevation — a maximum elevation change of 364 m.

The land around Saint-Brieuc is covered by artificial surfaces (41%) and trees (39%) within 3 km, trees (28%), cropland (28%) and water (23%) within 16 km, and water (33%), cropland (28%) and trees (24%) within 80 km.

3 km
141 m
16 km
275 m
80 km
364 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Pontivy 52 km · Lannion 56 km · Saint-Malo 58 km · Morlaix 78 km · Saint Helier 89 km · Rennes 93 km · Lanester 94 km · Vannes 95 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-Brieuc (48.5151°, -2.7684°, elevation 96 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).