Weather in Calais on 17 August 2026
Preliminary outlook for 17 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +20°C and nighttime around +16°C, average precipitation 0.1 mm, wind around 5 m/s, humidity around 77%.
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.
+18°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +15°C
Precipitation: 0 mm
Wind: 7 — 8 m/s
Humidity: 75%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 33% |
| Pressure (avg.) | 768 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +17°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +17°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 52° ↗ (NE) |
Sunrise
06:43
Duration
14 h 26 min
Sunset
21:09
Moonrise
Does not rise today
Moonset
17:01
Moon phase
Last Quarter
Illumination
37%
+18°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +17°C
Sea temperature: +18°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +20°C | Sun hours | 13 h |
| UV index | 5 | Cloud cover (avg.) | 3% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +18°C |
| Feels like (avg.) | +18°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +18°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 223° ↖ (NNW) |
Sunrise
06:43
Duration
14 h 26 min
Sunset
21:09
Moonrise
20:35
Moonset
02:56
Moon phase
Waxing Gibbous
Illumination
86%
+18°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 6 — 7 m/s
Humidity: 80%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +20°C | Sun hours | 15 h |
| UV index | 5 | Cloud cover (avg.) | 19% |
| Pressure (avg.) | 764 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.) | 64° ↗ (NE) |
Sunrise
06:42
Duration
14 h 28 min
Sunset
21:10
Moonrise
07:47
Moonset
22:01
Moon phase
Waxing Crescent
Illumination
1%
+20°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +19°C
Precipitation: 0.1 mm
Wind: 4 — 6 m/s
Humidity: 79%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 46% |
| 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.) | +16°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 47° ↑ (NNE) |
Sunrise
06:43
Duration
14 h 27 min
Sunset
21:10
Moonrise
23:28
Moonset
13:24
Moon phase
Waning Gibbous
Illumination
61%
+16°C
Weather archive — for 2021 year
Patchy rain nearby
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 0.2 mm
Wind: 5 — 7 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 7 h |
| UV index | 5 | Cloud cover (avg.) | 72% |
| Pressure (avg.) | 765 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +16°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +16°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 295° ↖ (NW) |
Sunrise
06:43
Duration
14 h 26 min
Sunset
21:09
Moonrise
17:16
Moonset
00:32
Moon phase
First Quarter
Illumination
61%
+18°C
Weather archive — for 2020 year
Patchy rain nearby
Weather archive — for 2020 year
Nighttime: +17°C
Precipitation: 0.1 mm
Wind: 4 — 6 m/s
Humidity: 84%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 10 h |
| UV index | 4 | Cloud cover (avg.) | 49% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +18°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +18°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 196° ↙ (SW) |
Sunrise
06:43
Duration
14 h 26 min
Sunset
21:09
Moonrise
04:13
Moonset
20:47
Moon phase
Waning Crescent
Illumination
1%
Weather in Calais on 17 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+19°C
|
+15°C
|
+18°C | 12 h | 5 | 75% | 7 — 8 m/s |
| 2024 |
+20°C
|
+17°C
|
+18°C | 13 h | 5 | 69% | 3 — 4 m/s |
| 2023 |
+20°C
|
+16°C
|
+18°C | 15 h | 5 | 80% | 6 — 7 m/s |
| 2022 |
+22°C
|
+19°C
|
+20°C | 12 h | 5 | 79% | 4 — 6 m/s |
| 2021 |
+17°C
|
+14°C
|
+16°C | 7 h | 5 | 76% | 5 — 7 m/s |
| 2020 |
+19°C
|
+17°C
|
+18°C | 10 h | 4 | 84% | 4 — 6 m/s |