Weather in Grande-Synthe on 21 July 2026
Hourly weather for 21 July 2026
The hourly forecast for Grande-Synthe on 21 July 2026 shows temperatures from +14.3°C to +20.7°C.
Key figures: precipitation 0.4 mm, wind 2 — 4 m/s, average humidity 71%.
+18.3°C
Hourly weather — 2026
Cloudy
Current weather forecast
Hourly weather — 2026
Nighttime: +14.3°C
Sea temperature: +21°C
Precipitation: 0.4 mm
Wind: 2 — 4 m/s
Humidity: 71%
Precipitation: 0.4 mm
Wind: 2 — 4 m/s
Humidity: 71%
Hourly weather
21 July
00:00
+16°C
4 m/s
01:00
+15.6°C
4 m/s
02:00
+15.3°C
3 m/s
03:00
+15°C
3 m/s
04:00
+14.4°C
3 m/s
05:00
+14.3°C
3 m/s
06:00
+14.3°C
3 m/s
07:00
+14.9°C
2 m/s
08:00
+16.5°C
3 m/s
09:00
+18.3°C
4 m/s
10:00
+19.5°C
4 m/s
11:00
+20.1°C
4 m/s
12:00
+20.4°C
4 m/s
13:00
+20.6°C
4 m/s
0 mm
14:00
+20.7°C
4 m/s
0.1 mm
15:00
+20.6°C
4 m/s
0.1 mm
16:00
+20.6°C
4 m/s
0.1 mm
17:00
+20.7°C
4 m/s
0 mm
18:00
+20.6°C
4 m/s
19:00
+20.1°C
4 m/s
20:00
+19.6°C
4 m/s
21:00
+18.6°C
4 m/s
22:00
+17.5°C
3 m/s
23:00
+16.8°C
2 m/s
| July 21, 2026 |
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05:00
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06:00
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08:00
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Now
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10:00
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11:00
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13:00
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14:00
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15:00
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16:00
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17:00
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18:00
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19:00
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20:00
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21:00
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22:00
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23:00
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature | +16°C | +15.6°C | +15.3°C | +15°C | +14.4°C | +14.3°C | +14.3°C | +14.9°C | +16.5°C | +18.3°C | +19.5°C | +20.1°C | +20.4°C | +20.6°C | +20.7°C | +20.6°C | +20.6°C | +20.7°C | +20.6°C | +20.1°C | +19.6°C | +18.6°C | +17.5°C | +16.8°C |
| Feels like | +16°C | +15°C | +15°C | +14°C | +14°C | +14°C | +14°C | +14.9°C | +16°C | +18°C | +24.6°C | +24.5°C | +24.5°C | +24.4°C | +24.4°C | +24.4°C | +24.4°C | +24.4°C | +24.4°C | +24.5°C | +24.6°C | +18.6°C | +17.5°C | +16.8°C |
| Precipitation | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0.1 mm | 0.1 mm | 0.1 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm |
| Humidity | 76% | 77% | 79% | 80% | 81% | 81% | 81% | 80% | 76% | 70% | 66% | 64% | 64% | 64% | 64% | 64% | 65% | 64% | 65% | 66% | 67% | 70% | 74% | 77% |
| Wind | 4 m/s | 4 m/s | 3 m/s | 3 m/s | 3 m/s | 3 m/s | 3 m/s | 2 m/s | 3 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 3 m/s | 2 m/s |
| Wind gusts | 6 m/s | 5 m/s | 5 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 4 m/s | 6 m/s | 7 m/s | 7 m/s | 8 m/s | 9 m/s | 8 m/s | 9 m/s | 8 m/s | 9 m/s | 9 m/s | 9 m/s | 7 m/s | 6 m/s | 5 m/s | 4 m/s |
| Wind direction | 26° (NNE) | 24° (NNE) | 23° (NNE) | 24° (NNE) | 21° (NNE) | 18° (NNE) | 14° (NNE) | 18° (NNE) | 19° (NNE) | 20° (NNE) | 18° (NNE) | 14° (NNE) | 7° (N) | 2° (N) | 357° (N) | 354° (N) | 354° (N) | 358° (N) | 0° (N) | 5° (N) | 8° (N) | 11° (N) | 13° (NNE) | 13° (NNE) |
| Pressure | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 771 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg | 770 mmHg |
| Cloud cover | 2% | 6% | 13% | 17% | 21% | 32% | 42% | 32% | 36% | 71% | 74% | 58% | 76% | 62% | 63% | 55% | 35% | 16% | 1% | 12% | 11% | 24% | 12% | 11% |
| Visibility | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km | 16 km |
| UV index | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 | 3 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 0 | 0 | 0 | 0 |
| Rain chance | 0% | 0% | 0% | 0% | 0% | 0% | 5% | 0% | 0% | 10% | 10% | 5% | 10% | 15% | 15% | 20% | 15% | 15% | 0% | 0% | 0% | 0% | 0% | 0% |
| Snow chance | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Water temperature | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C | +21°C |
Sunrise
06:00
Duration
15 h 51 min
Sunset
21:52
Moonrise
14:49
Moonset
00:09
Moon phase
First Quarter
Illumination
45%
+17°C
Weather archive — latest year: 2025
Light rain shower
Weather archive — latest year: 2025
Nighttime: +15°C
Precipitation: 0.8 mm
Wind: 7 — 10 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +20°C | Sun hours | 7 h |
| UV index | 4 | Cloud cover (avg.) | 74% |
| Pressure (avg.) | 752 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.) | 14 m/s | Wind direction (avg.) | 184° ↓ (S) |
Sunrise
06:01
Duration
15 h 51 min
Sunset
21:52
Moonrise
01:30
Moonset
19:17
Moon phase
Waning Crescent
Illumination
18%
+19°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +18°C
Sea temperature: +18°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 11 h |
| UV index | 4 | Cloud cover (avg.) | 59% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +18°C |
| Feels like (avg.) | +19°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 239° ← (W) |
Sunrise
06:02
Duration
15 h 50 min
Sunset
21:52
Moonrise
22:33
Moonset
05:14
Moon phase
Full Moon
Illumination
100%
+17°C
Weather archive — for 2023 year
Cloudy
Weather archive — for 2023 year
Nighttime: +14°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 68%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +20°C | Sun hours | 12 h |
| UV index | 4 | Cloud cover (avg.) | 69% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +17°C | Dew point (avg.) | +11°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +17°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 263° ↖ (NW) |
Sunrise
06:01
Duration
15 h 52 min
Sunset
21:53
Moonrise
09:59
Moonset
23:52
Moon phase
Waxing Crescent
Illumination
20%
+18°C
Weather archive — for 2022 year
Cloudy
Weather archive — for 2022 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 5 — 6 m/s
Humidity: 82%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 10 h |
| UV index | 4 | Cloud cover (avg.) | 65% |
| 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.) | +15°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 188° ↘ (SSE) |
Sunrise
06:01
Duration
15 h 52 min
Sunset
21:53
Moonrise
01:04
Moonset
15:38
Moon phase
Last Quarter
Illumination
43%
+19°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +15°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 75%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 15 h |
| UV index | 5 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 767 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 76° ↗ (ENE) |
Sunrise
06:01
Duration
15 h 51 min
Sunset
21:52
Moonrise
19:35
Moonset
02:33
Moon phase
Waxing Gibbous
Illumination
80%
+15°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +13°C
Precipitation: 0 mm
Wind: 3 — 3 m/s
Humidity: 64%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 15 h |
| UV index | 5 | Cloud cover (avg.) | 2% |
| Pressure (avg.) | 769 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +15°C | Dew point (avg.) | +9°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +15°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 130° ↙ (SW) |
Sunrise
06:02
Duration
15 h 50 min
Sunset
21:52
Moonrise
06:25
Moonset
22:46
Moon phase
Waxing Crescent
Illumination
2%
Weather in Grande-Synthe on 21 July in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+20°C
|
+15°C
|
+17°C | 7 h | 4 | 78% | 7 — 10 m/s |
| 2024 |
+22°C
|
+18°C
|
+19°C | 11 h | 4 | 83% | 4 — 6 m/s |
| 2023 |
+20°C
|
+14°C
|
+17°C | 12 h | 4 | 68% | 4 — 6 m/s |
| 2022 |
+21°C
|
+17°C
|
+18°C | 10 h | 4 | 82% | 5 — 6 m/s |
| 2021 |
+23°C
|
+15°C
|
+19°C | 15 h | 5 | 75% | 3 — 4 m/s |
| 2020 |
+17°C
|
+13°C
|
+15°C | 15 h | 5 | 64% | 3 — 3 m/s |