Weather in Saint-Brieuc on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +23°C and nighttime around +14°C, average precipitation 0.1 mm, wind around 4 m/s, humidity around 73%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+20°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +17°C
Precipitation: 0.2 mm
Wind: 4 — 6 m/s
Humidity: 53%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 8 h |
| UV index | 6 | Cloud cover (avg.) | 28% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +10°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 71° ↗ (ENE) |
Sunrise
07:09
Duration
14 h 11 min
Sunset
21:20
Moonrise
00:43
Moonset
18:21
Moon phase
Last Quarter
Illumination
29%
+16°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +11°C
Sea temperature: +18°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +18°C |
| Feels like (avg.) | +16°C | Dew point (avg.) | +9°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +16°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 304° ↖ (NW) |
Sunrise
07:09
Duration
14 h 10 min
Sunset
21:19
Moonrise
21:08
Moonset
04:46
Moon phase
Waxing Gibbous
Illumination
93%
+20°C
Weather archive — for 2023 year
Partly Cloudy
Weather archive — for 2023 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 3 — 3 m/s
Humidity: 65%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 10 h |
| UV index | 5 | Cloud cover (avg.) | 37% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 217° ↘ (SSE) |
Sunrise
07:08
Duration
14 h 13 min
Sunset
21:21
Moonrise
09:20
Moonset
22:30
Moon phase
Waxing Crescent
Illumination
9%
+19°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +16°C
Precipitation: 0.4 mm
Wind: 4 — 5 m/s
Humidity: 81%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 9 h |
| UV index | 5 | Cloud cover (avg.) | 48% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 6 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 258° ↑ (N) |
Sunrise
07:09
Duration
14 h 11 min
Sunset
21:20
Moonrise
Does not rise today
Moonset
14:56
Moon phase
Last Quarter
Illumination
54%
+16°C
Weather archive — for 2021 year
Cloudy
Weather archive — for 2021 year
Nighttime: +12°C
Precipitation: 0.1 mm
Wind: 3 — 4 m/s
Humidity: 85%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 3 h |
| UV index | 4 | Cloud cover (avg.) | 80% |
| Pressure (avg.) | 767 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +15°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +15°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 299° ← (WNW) |
Sunrise
07:09
Duration
14 h 11 min
Sunset
21:20
Moonrise
18:38
Moonset
01:41
Moon phase
Waxing Gibbous
Illumination
69%
+18°C
Weather archive — for 2020 year
Patchy rain nearby
Weather archive — for 2020 year
Nighttime: +14°C
Precipitation: 0.1 mm
Wind: 4 — 5 m/s
Humidity: 84%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 10 h |
| UV index | 5 | Cloud cover (avg.) | 55% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +17°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +18°C | Wind chill (avg.) | +17°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 239° ↓ (SSW) |
Sunrise
07:09
Duration
14 h 11 min
Sunset
21:20
Moonrise
05:51
Moonset
21:28
Moon phase
New Moon
Illumination
0%
Weather in Saint-Brieuc on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+25°C
|
+17°C
|
+20°C | 8 h | 6 | 53% | 4 — 6 m/s |
| 2024 |
+22°C
|
+11°C
|
+16°C | 12 h | 5 | 68% | 4 — 6 m/s |
| 2023 |
+25°C
|
+16°C
|
+20°C | 10 h | 5 | 65% | 3 — 3 m/s |
| 2022 |
+23°C
|
+16°C
|
+19°C | 9 h | 5 | 81% | 4 — 5 m/s |
| 2021 |
+19°C
|
+12°C
|
+16°C | 3 h | 4 | 85% | 3 — 4 m/s |
| 2020 |
+22°C
|
+14°C
|
+18°C | 10 h | 5 | 84% | 4 — 5 m/s |