Véloroute du Nord, stage 1: Halluin → Dainville

On stage 1 (Halluin → Dainville, 80 km) the best month is September: 79% of days were dry with highs of 10–30 °C, and riding Dainville → Halluin meant an average tailwind of 3.1 km/h (ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← Véloroute du Nord (Whole route)

80 kmLength

SeptemberBest months

Dainville → HalluinBetter direction in the best month

3.1 km/hAverage tailwind in the best month

79%Dry days with 10–30 °C

June · 74%Best summer month

Start: Halluin · Finish: Dainville · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

Good days

Month	Good days	Rain days ≥ 1 mm	Rain, mm	Avg high	Days ≥ 30 °C	Days < 10 °C	Daylight, h
January	12%	25%	64	7 °C	0%	79%	8.4 †
February	23%	25%	53	8 °C	0%	66%	10.0 †
March	51%	22%	55	11 °C	0%	39%	11.7
April	70%	21%	42	15 °C	0%	12%	13.7
May	73%	26%	64	18 °C	0%	2%	15.5
June	74%	23%	61	21 °C	2%	0%	16.4
July	74%	22%	59	23 °C	5%	0%	16.0
August	71%	24%	66	23 °C	5%	0%	14.5
September	79%	19%	50	20 °C	1%	0%	12.5
October	74%	22%	70	16 °C	0%	4%	10.6 †
November	44%	26%	64	11 °C	0%	39%	8.9 †
December	20%	22%	68	8 °C	0%	70%	8.0 †

Best months are all months within 3 percentage points of the best one. † less than 11 hours of daylight — long stages get tight.

Wind by month

Wind Halluin → Dainville, km/h

Month	Wind Halluin → Dainville, km/h	Headwind > 15 km/h, Halluin → Dainville	Headwind > 15 km/h, Dainville → Halluin	Better way
January	−7.3	30%	4%	Dainville → Halluin
February	−5.8	28%	8%	Dainville → Halluin
March	−2.3	20%	11%	Dainville → Halluin
April	+0.5	14%	13%	either
May	−0.3	16%	11%	either
June	−1.1	14%	10%	either
July	−3.9	18%	4%	Dainville → Halluin
August	−4.6	17%	4%	Dainville → Halluin
September	−3.1	17%	6%	Dainville → Halluin
October	−6.1	25%	3%	Dainville → Halluin
November	−7.8	30%	3%	Dainville → Halluin
December	−8.7	33%	3%	Dainville → Halluin

Along the route (sections of about 25 km)

km	Heading	Tailwind in September, km/h
0–25	SW	−3.2
25–50	SW	−3.0
50–78	SW	−3.1
78–80	SW	−3.4

Other stages

Halluin → Dainville 80 km
Dainville → Beauvais 120 km
Beauvais → Cergy-Pontoise 124 km
Cergy-Pontoise → Paris 70 km

How to read the numbers

Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.