Grande-Synthe in May
6.8out of 10
Possible, with caveats
Mild: highs around 16°C. Frequent rain: about 11 rainy days.
16°CAvg high
10°CAvg low
11Rainy days (54 mm)
15:19 hDaylight
06:08Sunrise · 21:26 Sunset
Why this score
- Mild: highs around 16°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±4.3 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.3 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 7°C | 3°C | 56 mm | 11 | – | – | 5.2 |
| February | 8°C | 3°C | 47 mm | 10 | – | – | 5.4 |
| March | 10°C | 5°C | 46 mm | 11 | – | – | 5.8 |
| April | 13°C | 7°C | 44 mm | 10 | – | – | 6.3 |
| May | 16°C | 10°C | 54 mm | 11 | – | – | 6.8 |
| June | 19°C | 12°C | 54 mm | 10 | – | – | 7.3 |
| July | 22°C | 14°C | 54 mm | 10 | – | – | 7.6 |
| August | 22°C | 15°C | 63 mm | 11 | – | – | 7.6 |
| September | 19°C | 12°C | 55 mm | 10 | – | – | 7.3 |
| October | 15°C | 9°C | 65 mm | 12 | – | – | 6.3 |
| November | 11°C | 6°C | 65 mm | 12 | – | – | 5.6 |
| December | 8°C | 4°C | 68 mm | 12 | – | – | 5.1 |
Frequently asked questions
How hot is Grande-Synthe in May?
Daytime highs average 16°C and nights about 10°C.
When is the best time to visit Grande-Synthe?
The best months are July, August, June, September.