Nasjonal sykkelrute 1 Etappe 6, stage 3: Risør → Larvik
On stage 3 (Risør → Larvik, 141 km) the best month is June: 78% of days were dry with highs of 10–30 °C, and riding Risør → Larvik meant an average tailwind of 3.5 km/h (ERA5 2006–2025, 9:00–18:00).
← Nasjonal sykkelrute 1 Etappe 6 (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% | 28% | 110 | 2 °C | 0% | 100% | 6.9 † |
| February | 0% | 25% | 80 | 2 °C | 0% | 100% | 9.2 † |
| March | 5% | 18% | 68 | 5 °C | 0% | 95% | 11.6 |
| April | 34% | 15% | 50 | 9 °C | 0% | 64% | 14.4 |
| May | 72% | 20% | 70 | 14 °C | 0% | 12% | 16.9 |
| June | 78% | 22% | 79 | 18 °C | 0% | 0% | 18.4 |
| July | 75% | 25% | 94 | 20 °C | 0% | 0% | 17.8 |
| August | 72% | 28% | 114 | 19 °C | 0% | 0% | 15.4 |
| September | 74% | 26% | 123 | 16 °C | 0% | 0% | 12.7 |
| October | 48% | 30% | 131 | 11 °C | 0% | 32% | 10.1 † |
| November | 10% | 31% | 129 | 7 °C | 0% | 85% | 7.6 † |
| December | 1% | 30% | 110 | 3 °C | 0% | 98% | 6.2 † |
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 Risør → Larvik, km/h | Headwind > 15 km/h, Risør → Larvik | Headwind > 15 km/h, Larvik → Risør | Better way |
|---|---|---|---|---|
| January | +1.2 | 17% | 21% | either |
| February | +1.0 | 16% | 19% | either |
| March | +1.3 | 14% | 16% | either |
| April | +0.9 | 10% | 13% | either |
| May | +1.7 | 9% | 14% | either |
| June | +3.5 | 6% | 17% | Risør → Larvik |
| July | +3.9 | 5% | 17% | Risør → Larvik |
| August | +3.8 | 6% | 19% | Risør → Larvik |
| September | +2.8 | 10% | 21% | Risør → Larvik |
| October | +2.2 | 14% | 23% | Risør → Larvik |
| November | +0.8 | 19% | 22% | either |
| December | +2.4 | 14% | 23% | Risør → Larvik |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in June, km/h |
|---|---|---|
| 236–261 | NE | +5.1 |
| 261–286 | NE | +4.9 |
| 286–311 | NE | +4.6 |
| 311–337 | NE | +6.9 |
| 337–362 | SE | −5.6 |
| 362–377 | NE | +6.4 |
Other stages
- Spangereid → Birkeland 116 km
- Birkeland → Risør 120 km
- Risør → Larvik 141 km
- Larvik → Moss 93 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.