Weather in Boulogne-sur-Mer on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +21°C and nighttime around +16°C, average precipitation 0.1 mm, wind around 5 m/s, humidity around 80%.
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.
+19°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +17°C
Precipitation: 0 mm
Wind: 6 — 8 m/s
Humidity: 73%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 11 h |
| UV index | 5 | Cloud cover (avg.) | 32% |
| Pressure (avg.) | 765 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 45° ↗ (NE) |
Sunrise
06:46
Duration
14 h 22 min
Sunset
21:08
Moonrise
00:10
Moonset
18:18
Moon phase
Last Quarter
Illumination
29%
+17°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +16°C
Sea temperature: +22°C
Precipitation: 0 mm
Wind: 5 — 7 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 11% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +22°C |
| Feels like (avg.) | +17°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +17°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 272° ← (W) |
Sunrise
06:46
Duration
14 h 21 min
Sunset
21:07
Moonrise
21:00
Moonset
04:16
Moon phase
Waxing Gibbous
Illumination
93%
+20°C
Weather archive — for 2023 year
Cloudy
Weather archive — for 2023 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 85%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 10 h |
| UV index | 5 | Cloud cover (avg.) | 52% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 105° ↘ (SE) |
Sunrise
06:45
Duration
14 h 24 min
Sunset
21:09
Moonrise
08:59
Moonset
22:13
Moon phase
Waxing Crescent
Illumination
9%
+19°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +17°C
Precipitation: 0.1 mm
Wind: 4 — 4 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 4 h |
| UV index | 5 | Cloud cover (avg.) | 76% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 96° ↑ (N) |
Sunrise
06:46
Duration
14 h 22 min
Sunset
21:08
Moonrise
23:50
Moonset
14:45
Moon phase
Last Quarter
Illumination
54%
+16°C
Weather archive — for 2021 year
Cloudy
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 0 mm
Wind: 5 — 7 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 11 h |
| UV index | 4 | Cloud cover (avg.) | 79% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +16°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +16°C |
| Wind gusts (max.) | 13 m/s | Wind direction (avg.) | 279° ← (W) |
Sunrise
06:46
Duration
14 h 22 min
Sunset
21:08
Moonrise
18:33
Moonset
01:11
Moon phase
Waxing Gibbous
Illumination
69%
+18°C
Weather archive — for 2020 year
Cloudy
Weather archive — for 2020 year
Nighttime: +17°C
Precipitation: 0.2 mm
Wind: 5 — 6 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 9 h |
| UV index | 5 | Cloud cover (avg.) | 61% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +18°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +18°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 236° ↙ (WSW) |
Sunrise
06:46
Duration
14 h 21 min
Sunset
21:07
Moonrise
05:23
Moonset
21:18
Moon phase
New Moon
Illumination
0%
Weather in Boulogne-sur-Mer on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+23°C
|
+17°C
|
+19°C | 11 h | 5 | 73% | 6 — 8 m/s |
| 2024 |
+19°C
|
+16°C
|
+17°C | 12 h | 5 | 70% | 5 — 7 m/s |
| 2023 |
+23°C
|
+17°C
|
+20°C | 10 h | 5 | 85% | 4 — 6 m/s |
| 2022 |
+22°C
|
+17°C
|
+19°C | 4 h | 5 | 83% | 4 — 4 m/s |
| 2021 |
+17°C
|
+14°C
|
+16°C | 11 h | 4 | 83% | 5 — 7 m/s |
| 2020 |
+19°C
|
+17°C
|
+18°C | 9 h | 5 | 83% | 5 — 6 m/s |