Nasjonal sykkelrute 1 Etappe 6, stage 2: Birkeland → Risør
On stage 2 (Birkeland → Risør, 120 km) the best month is May: 73% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.2 km/h on average; 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% | 31% | 123 | 2 °C | 0% | 100% | 7.0 † |
| February | 2% | 27% | 90 | 3 °C | 0% | 98% | 9.2 † |
| March | 13% | 21% | 75 | 6 °C | 0% | 87% | 11.6 |
| April | 51% | 21% | 53 | 11 °C | 0% | 45% | 14.3 |
| May | 73% | 24% | 74 | 15 °C | 0% | 6% | 16.8 |
| June | 72% | 27% | 83 | 19 °C | 0% | 0% | 18.3 |
| July | 68% | 31% | 104 | 21 °C | 1% | 0% | 17.6 |
| August | 68% | 32% | 121 | 20 °C | 0% | 0% | 15.4 |
| September | 72% | 28% | 120 | 16 °C | 0% | 0% | 12.7 |
| October | 52% | 30% | 121 | 11 °C | 0% | 29% | 10.1 † |
| November | 11% | 30% | 122 | 6 °C | 0% | 83% | 7.7 † |
| December | 2% | 31% | 119 | 3 °C | 0% | 97% | 6.4 † |
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
| Month | Wind Birkeland → Risør, km/h | Headwind > 15 km/h, Birkeland → Risør | Headwind > 15 km/h, Risør → Birkeland | Better way |
|---|---|---|---|---|
| January | +1.6 | 11% | 18% | either |
| February | +1.1 | 12% | 15% | either |
| March | +0.9 | 13% | 15% | either |
| April | +0.4 | 10% | 11% | either |
| May | +1.2 | 9% | 12% | either |
| June | +3.5 | 4% | 14% | Birkeland → Risør |
| July | +4.0 | 4% | 14% | Birkeland → Risør |
| August | +3.9 | 5% | 15% | Birkeland → Risør |
| September | +2.6 | 8% | 18% | Birkeland → Risør |
| October | +2.1 | 12% | 17% | Birkeland → Risør |
| November | +0.9 | 14% | 15% | either |
| December | +2.8 | 8% | 20% | Birkeland → Risør |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in May, km/h |
|---|---|---|
| 116–142 | E | +0.3 |
| 142–167 | NE | +1.4 |
| 167–193 | NE | +1.6 |
| 193–218 | NE | +1.5 |
| 218–236 | NE | +1.0 |
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.