EuroVelo 15 – Rhine Cycle Route, stage 3: Konstanz → Rheinfelden

On stage 3 (Konstanz → Rheinfelden, 133 km) the best month is September: 76% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.5 km/h on average; ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← EuroVelo 15 – Rhine Cycle Route (Whole route)

133 kmLength

SeptemberBest months

eitherBetter direction in the best month

0.5 km/hAverage tailwind in the best month

76%Dry days with 10–30 °C

June · 58%Best summer month

Start: Konstanz · Finish: Rheinfelden · 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	5%	25%	88	4 °C	0%	93%	8.8 †
February	18%	24%	63	6 °C	0%	79%	10.2 †
March	42%	29%	78	10 °C	0%	48%	11.8
April	61%	30%	80	15 °C	0%	21%	13.6
May	59%	40%	127	18 °C	0%	4%	15.1
June	58%	37%	118	23 °C	6%	0%	16.0
July	56%	33%	120	25 °C	12%	0%	15.6
August	58%	33%	124	24 °C	11%	0%	14.3
September	76%	24%	87	20 °C	0%	0%	12.5
October	67%	24%	80	14 °C	0%	16%	10.8 †
November	24%	24%	83	8 °C	0%	69%	9.2 †
December	5%	30%	97	4 °C	0%	92%	8.4 †

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 Konstanz → Rheinfelden, km/h

Month	Wind Konstanz → Rheinfelden, km/h	Headwind > 15 km/h, Konstanz → Rheinfelden	Headwind > 15 km/h, Rheinfelden → Konstanz	Better way
January	−2.8	10%	1%	Rheinfelden → Konstanz
February	−1.6	8%	3%	either
March	−1.6	12%	4%	either
April	−0.3	6%	3%	either
May	−1.2	6%	4%	either
June	−0.9	3%	2%	either
July	−2.5	5%	1%	Rheinfelden → Konstanz
August	−2.1	3%	1%	Rheinfelden → Konstanz
September	−0.5	4%	2%	either
October	−0.6	4%	1%	either
November	−2.0	6%	1%	Rheinfelden → Konstanz
December	−2.8	7%	2%	Rheinfelden → Konstanz

Along the route (sections of about 25 km)

km	Heading	Tailwind in September, km/h
236–261	W	−0.7
261–286	W	−0.7
286–311	SW	−0.2
311–337	W	−0.3
337–362	W	−0.7
362–369	SW	−0.3

Other stages

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.