Nasjonal sykkelrute 5, stage 1: Larvik → Kongsberg
On stage 1 (Larvik → Kongsberg, 106 km) the best month is September: 72% of days were dry with highs of 10–30 °C, and riding Larvik → Kongsberg meant an average tailwind of 2.0 km/h (ERA5 2006–2025, 9:00–18:00).
← Nasjonal sykkelrute 5 (Whole route)
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 0% | 27% | 100 | -1 °C | 0% | 100% | 6.8 † |
| February | 1% | 22% | 74 | 1 °C | 0% | 99% | 9.1 † |
| March | 11% | 19% | 67 | 5 °C | 0% | 89% | 11.6 |
| April | 45% | 18% | 52 | 10 °C | 0% | 51% | 14.4 |
| May | 68% | 27% | 81 | 15 °C | 0% | 11% | 17.0 |
| June | 69% | 31% | 94 | 19 °C | 0% | 0% | 18.6 |
| July | 64% | 36% | 123 | 21 °C | 1% | 0% | 17.9 |
| August | 65% | 35% | 119 | 19 °C | 0% | 0% | 15.5 |
| September | 72% | 27% | 116 | 16 °C | 0% | 2% | 12.7 |
| October | 40% | 26% | 110 | 10 °C | 0% | 49% | 10.0 † |
| November | 6% | 27% | 104 | 4 °C | 0% | 91% | 7.5 † |
| December | 1% | 27% | 93 | 0 °C | 0% | 99% | 6.1 † |
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 Larvik → Kongsberg, km/h | Headwind > 15 km/h, Larvik → Kongsberg | Headwind > 15 km/h, Kongsberg → Larvik | Better way |
|---|---|---|---|---|
| January | −1.7 | 5% | 5% | either |
| February | −0.5 | 3% | 6% | either |
| March | 0.0 | 3% | 5% | either |
| April | −0.1 | 4% | 3% | either |
| May | +2.0 | 2% | 5% | Larvik → Kongsberg |
| June | +3.4 | 2% | 4% | Larvik → Kongsberg |
| July | +3.7 | 1% | 4% | Larvik → Kongsberg |
| August | +3.6 | 1% | 6% | Larvik → Kongsberg |
| September | +2.0 | 2% | 5% | Larvik → Kongsberg |
| October | +0.8 | 3% | 6% | either |
| November | −0.9 | 5% | 5% | either |
| December | −1.3 | 3% | 6% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | N | +2.7 |
| 25–50 | N | +3.0 |
| 50–76 | NW | +1.5 |
| 76–101 | NW | +0.8 |
| 101–106 | N | +1.8 |
Other stages
- Larvik → Kongsberg 106 km
- Kongsberg → Rødberg 112 km
- Rødberg → Gol 112 km
- Gol → near Vang 112 km
- near Vang → Vinstra 116 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.