Hærvejsruten, stage 2: Svenstrup → Viborg
On stage 2 (Svenstrup → Viborg, 102 km) the best month is September: 75% of days were dry with highs of 10–30 °C, and riding Viborg → Svenstrup meant an average tailwind of 4.7 km/h (ERA5 2006–2025, 9:00–18:00).
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 0% | 22% | 62 | 3 °C | 0% | 99% | 7.4 † |
| February | 2% | 21% | 47 | 4 °C | 0% | 98% | 9.4 † |
| March | 16% | 21% | 45 | 7 °C | 0% | 83% | 11.6 |
| April | 51% | 22% | 43 | 11 °C | 0% | 42% | 14.2 |
| May | 70% | 26% | 62 | 15 °C | 0% | 6% | 16.4 |
| June | 73% | 27% | 72 | 19 °C | 0% | 0% | 17.8 |
| July | 68% | 32% | 90 | 21 °C | 0% | 0% | 17.2 |
| August | 66% | 34% | 90 | 20 °C | 0% | 0% | 15.2 |
| September | 75% | 25% | 61 | 17 °C | 0% | 0% | 12.7 |
| October | 61% | 26% | 76 | 12 °C | 0% | 17% | 10.2 † |
| November | 18% | 22% | 54 | 8 °C | 0% | 75% | 8.0 † |
| December | 3% | 22% | 60 | 5 °C | 0% | 95% | 6.8 † |
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 Svenstrup → Viborg, km/h | Headwind > 15 km/h, Svenstrup → Viborg | Headwind > 15 km/h, Viborg → Svenstrup | Better way |
|---|---|---|---|---|
| January | −5.8 | 22% | 4% | Viborg → Svenstrup |
| February | −4.8 | 20% | 6% | Viborg → Svenstrup |
| March | −3.2 | 17% | 6% | Viborg → Svenstrup |
| April | −1.6 | 11% | 6% | either |
| May | −2.2 | 12% | 6% | Viborg → Svenstrup |
| June | −4.1 | 13% | 2% | Viborg → Svenstrup |
| July | −5.1 | 13% | 2% | Viborg → Svenstrup |
| August | −5.7 | 16% | 2% | Viborg → Svenstrup |
| September | −4.7 | 18% | 3% | Viborg → Svenstrup |
| October | −5.4 | 20% | 5% | Viborg → Svenstrup |
| November | −5.0 | 21% | 5% | Viborg → Svenstrup |
| December | −6.7 | 24% | 3% | Viborg → Svenstrup |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 102–127 | S | −3.6 |
| 127–152 | SW | −4.9 |
| 152–177 | SW | −4.9 |
| 177–204 | SW | −5.5 |
Other stages
- Frederikshavn → Svenstrup 102 km
- Svenstrup → Viborg 102 km
- Viborg → Vejen 135 km
- Vejen → Padborg 108 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.