Weather in Grande-Synthe on 4 August 2026
Preliminary outlook for 4 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 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
Patchy rain nearby
Weather archive — latest year: 2025
Nighttime: +18°C
Precipitation: 0.1 mm
Wind: 7 — 11 m/s
Humidity: 84%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 6 h |
| UV index | 4 | Cloud cover (avg.) | 72% |
| Pressure (avg.) | 764 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.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 14 m/s | Wind direction (avg.) | 244° ↙ (WSW) |
Sunrise
06:21
Duration
15 h 11 min
Sunset
21:32
Moonrise
19:09
Moonset
01:02
Moon phase
Waxing Gibbous
Illumination
69%
+18°C
Weather archive — for 2024 year
Partly Cloudy
Weather archive — for 2024 year
Nighttime: +16°C
Sea temperature: +19°C
Precipitation: 0 mm
Wind: 3 — 6 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 13 h |
| UV index | 5 | Cloud cover (avg.) | 46% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +19°C |
| Feels like (avg.) | +18°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +18°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 291° ← (W) |
Sunrise
06:22
Duration
15 h 09 min
Sunset
21:31
Moonrise
05:50
Moonset
22:03
Moon phase
New Moon
Illumination
0%
+17°C
Weather archive — for 2023 year
Patchy rain nearby
Weather archive — for 2023 year
Nighttime: +15°C
Precipitation: 0.3 mm
Wind: 4 — 5 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 11 h |
| UV index | 4 | Cloud cover (avg.) | 61% |
| Pressure (avg.) | 761 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.) | 8 m/s | Wind direction (avg.) | 326° ↖ (NNW) |
Sunrise
06:20
Duration
15 h 13 min
Sunset
21:33
Moonrise
23:03
Moonset
09:13
Moon phase
Waning Gibbous
Illumination
78%
+21°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 15 h |
| UV index | 5 | Cloud cover (avg.) | 25% |
| 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.) | +15°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 222° ↖ (NNW) |
Sunrise
06:21
Duration
15 h 11 min
Sunset
21:32
Moonrise
13:42
Moonset
Does not set today
Moon phase
First Quarter
Illumination
44%
+17°C
Weather archive — for 2021 year
Cloudy
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 74%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +19°C | Sun hours | 9 h |
| UV index | 5 | Cloud cover (avg.) | 62% |
| Pressure (avg.) | 760 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.) | 4 m/s | Wind direction (avg.) | 237° ← (WNW) |
Sunrise
06:21
Duration
15 h 11 min
Sunset
21:32
Moonrise
02:15
Moonset
19:29
Moon phase
Waning Crescent
Illumination
18%
+17°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +15°C
Precipitation: 0 mm
Wind: 3 — 6 m/s
Humidity: 65%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 15 h |
| UV index | 5 | Cloud cover (avg.) | 25% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +18°C | Dew point (avg.) | +10°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 151° ↓ (SSW) |
Sunrise
06:21
Duration
15 h 10 min
Sunset
21:31
Moonrise
22:28
Moonset
06:47
Moon phase
Full Moon
Illumination
100%
Weather in Grande-Synthe on 4 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+22°C
|
+18°C
|
+20°C | 6 h | 4 | 84% | 7 — 11 m/s |
| 2024 |
+19°C
|
+16°C
|
+18°C | 13 h | 5 | 71% | 3 — 6 m/s |
| 2023 |
+19°C
|
+15°C
|
+17°C | 11 h | 4 | 76% | 4 — 5 m/s |
| 2022 |
+24°C
|
+18°C
|
+21°C | 15 h | 5 | 69% | 4 — 5 m/s |
| 2021 |
+19°C
|
+14°C
|
+17°C | 9 h | 5 | 74% | 2 — 3 m/s |
| 2020 |
+21°C
|
+15°C
|
+17°C | 15 h | 5 | 65% | 3 — 6 m/s |