Grande-Synthe weather in December
In December, Grande-Synthe sees average daytime highs of 8°C and overnight lows near 4°C, with 68 mm of precipitation across 12.5 wet days and about 7.8 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 8°C through the month. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels dry.
Daylight stretches from about 8 hours at the start of December to 7 h 42 min by month's end. Set against the rest of the year, December is Grande-Synthe's 10th-clearest and 2nd-windiest month. For the whole year in context, see Grande-Synthe's year-round climate.
- Daytime high
- 8°
- 10th warmest
- Overnight low
- 4°
- 3rd coldest
- Precipitation
- 68 mm
- 12.5 wet days
- Daylight
- 7 h 42 min
- 8:56 AM – 4:38 PM
- Cloud cover
- 73%
- 10th clearest
- Wind
- 19 km/h
- 2nd windiest
- Solar energy
- 0.66 kWh/m²
- Travel score
- 1.1
- out of 10
- Air quality
- Good
- PM10 23.4 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 8°C through the month.
A typical December day in Grande-Synthe reaches about 8°C in the afternoon and slips back to 4°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 12°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Avg low (°C) | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 9 | 5 |
| 2 | 9 | 5 |
| 3 | 8 | 5 |
| 4 | 8 | 5 |
| 5 | 8 | 4 |
| 6 | 8 | 4 |
| 7 | 8 | 4 |
| 8 | 8 | 4 |
| 9 | 8 | 4 |
| 10 | 8 | 4 |
| 11 | 8 | 4 |
| 12 | 8 | 4 |
| 13 | 8 | 4 |
| 14 | 8 | 4 |
| 15 | 8 | 4 |
| 16 | 8 | 4 |
| 17 | 8 | 4 |
| 18 | 8 | 4 |
| 19 | 8 | 4 |
| 20 | 8 | 4 |
| 21 | 8 | 4 |
| 22 | 8 | 4 |
| 23 | 7 | 4 |
| 24 | 7 | 4 |
| 25 | 7 | 4 |
| 26 | 7 | 4 |
| 27 | 7 | 4 |
| 28 | 7 | 4 |
| 29 | 7 | 4 |
| 30 | 7 | 4 |
| 31 | 7 | 4 |
How December really feels in Grande-Synthe
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 19 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is cold — wind chill drags the overnight "feels like" below the raw low.
Grande-Synthe weather by month
How December compares with the rest of the year at a glance. December is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 3° | 56 | 11.8 | 0.9 | 8.2 | 0.9 |
| Feb | 8° / 3° | 47 | 10 | 0.8 | 9.6 | 1.1 |
| Mar | 10° / 5° | 46 | 10.6 | 0.5 | 11.5 | 2.3 |
| Apr | 13° / 7° | 44 | 10.2 | 0.1 | 13.5 | 3.7 |
| May | 16° / 10° | 54 | 10.7 | 0 | 15.3 | 5.1 |
| Jun | 19° / 12° | 54 | 9.9 | 0 | 16.2 | 6.0 |
| Jul | 22° / 15° | 54 | 10.5 | 0 | 15.8 | 6.5 |
| Aug | 22° / 15° | 63 | 10.5 | 0 | 14.3 | 6.5 |
| Sep | 19° / 13° | 55 | 9.8 | 0 | 12.4 | 5.9 |
| Oct | 15° / 10° | 65 | 11.9 | 0 | 10.4 | 4.2 |
| Nov | 11° / 6° | 65 | 12.8 | 0.3 | 8.7 | 2.3 |
| Dec | 8° / 4° | 68 | 12.5 | 0.8 | 7.8 | 1.1 |
Cloud cover in December
The sky is clear or mostly clear about 14% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 71%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 26 | 28 | 28 | 29 | 30 | 30 | 30 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 29 |
| Cloudier (%) | 74 | 72 | 72 | 71 | 70 | 70 | 70 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 70 | 70 | 71 | 72 | 73 | 72 | 72 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 26 | 74 |
| 2 | 28 | 72 |
| 3 | 28 | 72 |
| 4 | 29 | 71 |
| 5 | 30 | 70 |
| 6 | 30 | 70 |
| 7 | 30 | 70 |
| 8 | 32 | 68 |
| 9 | 32 | 68 |
| 10 | 32 | 68 |
| 11 | 32 | 68 |
| 12 | 32 | 68 |
| 13 | 32 | 68 |
| 14 | 31 | 69 |
| 15 | 31 | 69 |
| 16 | 30 | 70 |
| 17 | 30 | 70 |
| 18 | 29 | 71 |
| 19 | 28 | 72 |
| 20 | 27 | 73 |
| 21 | 28 | 72 |
| 22 | 28 | 72 |
| 23 | 27 | 73 |
| 24 | 27 | 73 |
| 25 | 27 | 73 |
| 26 | 27 | 73 |
| 27 | 27 | 73 |
| 28 | 28 | 72 |
| 29 | 28 | 72 |
| 30 | 28 | 72 |
| 31 | 29 | 71 |
Chance of precipitation in December
Grande-Synthe gets around 68 mm of rain and snow over 12.5 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 40% and peaks near 42% on the wettest days, and about 1 day brings snow.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 42 | 41 | 41 | 41 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 41 |
| Snow chance (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 42 | 2 |
| 2 | 41 | 2 |
| 3 | 41 | 2 |
| 4 | 41 | 2 |
| 5 | 40 | 2 |
| 6 | 40 | 2 |
| 7 | 39 | 2 |
| 8 | 39 | 2 |
| 9 | 39 | 2 |
| 10 | 38 | 2 |
| 11 | 38 | 2 |
| 12 | 38 | 2 |
| 13 | 38 | 2 |
| 14 | 38 | 3 |
| 15 | 39 | 3 |
| 16 | 39 | 3 |
| 17 | 39 | 3 |
| 18 | 40 | 3 |
| 19 | 40 | 3 |
| 20 | 40 | 3 |
| 21 | 41 | 3 |
| 22 | 41 | 3 |
| 23 | 41 | 3 |
| 24 | 42 | 3 |
| 25 | 42 | 3 |
| 26 | 42 | 3 |
| 27 | 42 | 3 |
| 28 | 42 | 3 |
| 29 | 42 | 3 |
| 30 | 42 | 3 |
| 31 | 41 | 3 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in December
Winds average 19 km/h in December.
Across December, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 18 | light breeze |
| 2 | 18 | light breeze |
| 3 | 18 | light breeze |
| 4 | 18 | light breeze |
| 5 | 18 | light breeze |
| 6 | 18 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 18 | light breeze |
| 13 | 18 | light breeze |
| 14 | 18 | light breeze |
| 15 | 18 | light breeze |
| 16 | 19 | light breeze |
| 17 | 19 | light breeze |
| 18 | 19 | light breeze |
| 19 | 19 | light breeze |
| 20 | 19 | light breeze |
| 21 | 19 | light breeze |
| 22 | 19 | light breeze |
| 23 | 19 | light breeze |
| 24 | 19 | light breeze |
| 25 | 19 | light breeze |
| 26 | 19 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
| 31 | 19 | light breeze |
Sunrise & sunset in December
Daylight runs from about 8 hours at the start of December to 7 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over December. Sunrise moves from 8:40 AM to 9:02 AM, and sunset from 4:41 PM to 4:46 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 8.0 | 8.0 | 8.0 | 7.9 | 7.9 | 7.9 | 7.9 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 |
| Sunrise (AM) | 8:40 | 8:41 | 8:42 | 8:44 | 8:45 | 8:46 | 8:47 | 8:48 | 8:49 | 8:50 | 8:51 | 8:52 | 8:53 | 8:54 | 8:55 | 8:56 | 8:56 | 8:57 | 8:58 | 8:58 | 8:59 | 8:59 | 9:00 | 9:00 | 9:01 | 9:01 | 9:01 | 9:01 | 9:01 | 9:02 | 9:02 |
| Sunset (PM) | 4:41 | 4:41 | 4:40 | 4:40 | 4:39 | 4:39 | 4:39 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:39 | 4:39 | 4:39 | 4:40 | 4:40 | 4:41 | 4:41 | 4:42 | 4:42 | 4:43 | 4:44 | 4:45 | 4:45 | 4:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 8.0 | 8:40 | 4:41 |
| 2 | 8.0 | 8:41 | 4:41 |
| 3 | 8.0 | 8:42 | 4:40 |
| 4 | 7.9 | 8:44 | 4:40 |
| 5 | 7.9 | 8:45 | 4:39 |
| 6 | 7.9 | 8:46 | 4:39 |
| 7 | 7.9 | 8:47 | 4:39 |
| 8 | 7.8 | 8:48 | 4:38 |
| 9 | 7.8 | 8:49 | 4:38 |
| 10 | 7.8 | 8:50 | 4:38 |
| 11 | 7.8 | 8:51 | 4:38 |
| 12 | 7.8 | 8:52 | 4:38 |
| 13 | 7.7 | 8:53 | 4:38 |
| 14 | 7.7 | 8:54 | 4:38 |
| 15 | 7.7 | 8:55 | 4:38 |
| 16 | 7.7 | 8:56 | 4:38 |
| 17 | 7.7 | 8:56 | 4:38 |
| 18 | 7.7 | 8:57 | 4:39 |
| 19 | 7.7 | 8:58 | 4:39 |
| 20 | 7.7 | 8:58 | 4:39 |
| 21 | 7.7 | 8:59 | 4:40 |
| 22 | 7.7 | 8:59 | 4:40 |
| 23 | 7.7 | 9:00 | 4:41 |
| 24 | 7.7 | 9:00 | 4:41 |
| 25 | 7.7 | 9:01 | 4:42 |
| 26 | 7.7 | 9:01 | 4:42 |
| 27 | 7.7 | 9:01 | 4:43 |
| 28 | 7.7 | 9:01 | 4:44 |
| 29 | 7.7 | 9:01 | 4:45 |
| 30 | 7.7 | 9:02 | 4:45 |
| 31 | 7.7 | 9:02 | 4:46 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 0.66 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 0.66 kWh/m² to a high of 5.63 kWh/m² in June across the year — December's 0.66 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 0.8 | Dim |
| 2 | 0.8 | Dim |
| 3 | 0.8 | Dim |
| 4 | 0.7 | Dim |
| 5 | 0.7 | Dim |
| 6 | 0.7 | Dim |
| 7 | 0.7 | Dim |
| 8 | 0.7 | Dim |
| 9 | 0.7 | Dim |
| 10 | 0.7 | Dim |
| 11 | 0.7 | Dim |
| 12 | 0.7 | Dim |
| 13 | 0.7 | Dim |
| 14 | 0.7 | Dim |
| 15 | 0.7 | Dim |
| 16 | 0.7 | Dim |
| 17 | 0.7 | Dim |
| 18 | 0.7 | Dim |
| 19 | 0.7 | Dim |
| 20 | 0.7 | Dim |
| 21 | 0.6 | Dim |
| 22 | 0.6 | Dim |
| 23 | 0.6 | Dim |
| 24 | 0.6 | Dim |
| 25 | 0.6 | Dim |
| 26 | 0.6 | Dim |
| 27 | 0.7 | Dim |
| 28 | 0.7 | Dim |
| 29 | 0.7 | Dim |
| 30 | 0.7 | Dim |
| 31 | 0.7 | Dim |
Is December a good time to visit Grande-Synthe?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Grande-Synthe.
What to pack for Grande-Synthe in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Grande-Synthe sees daytime highs around 8°C and nights near 4°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.
Sea temperature near Grande-Synthe in December
The nearest coast averages about 10°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 13 km away) is warmest in August at about 18°C and coldest in February near 7°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 8 | 7 | 7 | 9 | 12 | 15 | 17 | 18 | 18 | 15 | 13 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 8 | Bracing |
| Feb | 7 | Bracing |
| Mar | 7 | Bracing |
| Apr | 9 | Bracing |
| May | 12 | Bracing |
| Jun | 15 | Bracing |
| Jul | 17 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 15 | Cool |
| Nov | 13 | Bracing |
| Dec | 10 | Bracing |
UV index in Grande-Synthe in December
Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Grande-Synthe peaks around June 22 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 6 | 6 | 6 | 6 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Where is Grande-Synthe?
Grande-Synthe sits at 51.0°N, 2.3°E, 2 m above sea level, in France. The nearest listed city is Saint-Pol-sur-Mer, 3.0 km away.
Topography around Grande-Synthe
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Grande-Synthe.
Within 3 km, the terrain around Grande-Synthe has only modest variations in elevation — a maximum elevation change of 42 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, significant variations in elevation — a maximum elevation change of 290 m.
The land around Grande-Synthe is covered by artificial surfaces (50%) and trees (22%) within 3 km, water (39%) and cropland (37%) within 16 km, and water (38%) and cropland (34%) within 80 km.
France travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 77% of US
- price level, 2025
- GDP per capita
- $48,986
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.3
- per 100k, 2023
- Road deaths
- 5.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 539
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Grande-Synthe (51.0154°, 2.2997°, elevation 2 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).