EuroVelo 7 - Sun Route - part Czech Republic, stage 1: near Děčín → Mělník
On stage 1 (near Děčín → Mělník, 112 km) the best month is September: 78% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.3 km/h on average; ERA5 2006–2025, 9:00–18:00).
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Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 3% | 20% | 47 | 2 °C | 0% | 96% | 8.4 † |
| February | 7% | 17% | 36 | 4 °C | 0% | 91% | 10.0 † |
| March | 33% | 20% | 40 | 8 °C | 0% | 62% | 11.7 |
| April | 64% | 20% | 37 | 14 °C | 0% | 26% | 13.7 |
| May | 71% | 27% | 62 | 18 °C | 0% | 3% | 15.5 |
| June | 68% | 26% | 72 | 23 °C | 7% | 0% | 16.4 |
| July | 62% | 26% | 74 | 25 °C | 13% | 0% | 16.0 |
| August | 65% | 26% | 84 | 24 °C | 11% | 0% | 14.5 |
| September | 78% | 20% | 55 | 19 °C | 2% | 1% | 12.5 |
| October | 63% | 19% | 49 | 13 °C | 0% | 23% | 10.6 † |
| November | 20% | 17% | 42 | 7 °C | 0% | 77% | 8.9 † |
| December | 3% | 18% | 45 | 3 °C | 0% | 96% | 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
| Month | Wind near Děčín → Mělník, km/h | Headwind > 15 km/h, near Děčín → Mělník | Headwind > 15 km/h, Mělník → near Děčín | Better way |
|---|---|---|---|---|
| January | −0.5 | 4% | 6% | either |
| February | −0.1 | 4% | 6% | either |
| March | +0.7 | 5% | 8% | either |
| April | +1.7 | 4% | 9% | either |
| May | +1.5 | 4% | 7% | either |
| June | +2.2 | 2% | 7% | near Děčín → Mělník |
| July | +2.6 | 1% | 6% | near Děčín → Mělník |
| August | +0.7 | 2% | 3% | either |
| September | +0.3 | 3% | 5% | either |
| October | −1.3 | 4% | 4% | either |
| November | −2.1 | 3% | 3% | Mělník → near Děčín |
| December | −1.7 | 4% | 4% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | S | −0.6 |
| 25–50 | SW | −1.4 |
| 50–75 | SE | +1.4 |
| 75–101 | SE | +1.6 |
| 101–112 | SE | +0.6 |
Other stages
- near Děčín → Mělník 112 km
- Mělník → near Sedlčany 113 km
- near Sedlčany → Týn nad Vltavou 113 km
- Týn nad Vltavou → Burgfried 112 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.