Nasjonal sykkelrute 1 Etappe 6, stage 1: Spangereid → Birkeland
On stage 1 (Spangereid → Birkeland, 116 km) the best month is June: 71% of days were dry with highs of 10–30 °C, and riding Spangereid → Birkeland meant an average tailwind of 5.7 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% | 35% | 155 | 2 °C | 0% | 100% | 7.1 † |
| February | 1% | 33% | 119 | 2 °C | 0% | 99% | 9.3 † |
| March | 8% | 25% | 93 | 5 °C | 0% | 91% | 11.6 |
| April | 38% | 26% | 67 | 10 °C | 0% | 58% | 14.3 |
| May | 67% | 26% | 92 | 14 °C | 0% | 14% | 16.7 |
| June | 71% | 29% | 99 | 18 °C | 0% | 0% | 18.2 |
| July | 64% | 36% | 131 | 20 °C | 0% | 0% | 17.5 |
| August | 62% | 38% | 152 | 18 °C | 0% | 0% | 15.3 |
| September | 65% | 34% | 147 | 15 °C | 0% | 0% | 12.7 |
| October | 41% | 37% | 155 | 11 °C | 0% | 36% | 10.1 † |
| November | 6% | 35% | 152 | 6 °C | 0% | 88% | 7.8 † |
| December | 1% | 38% | 159 | 3 °C | 0% | 99% | 6.5 † |
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 Spangereid → Birkeland, km/h | Headwind > 15 km/h, Spangereid → Birkeland | Headwind > 15 km/h, Birkeland → Spangereid | Better way |
|---|---|---|---|---|
| January | +1.0 | 18% | 20% | either |
| February | +0.4 | 18% | 17% | either |
| March | +1.1 | 18% | 19% | either |
| April | +1.5 | 14% | 16% | either |
| May | +2.9 | 12% | 19% | Spangereid → Birkeland |
| June | +5.7 | 6% | 23% | Spangereid → Birkeland |
| July | +5.9 | 6% | 24% | Spangereid → Birkeland |
| August | +4.9 | 7% | 21% | Spangereid → Birkeland |
| September | +2.9 | 13% | 22% | Spangereid → Birkeland |
| October | +2.0 | 16% | 20% | either |
| November | +0.2 | 19% | 18% | either |
| December | +2.3 | 14% | 22% | Spangereid → Birkeland |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in June, km/h |
|---|---|---|
| 0–25 | E | +6.2 |
| 25–51 | E | +5.5 |
| 51–76 | NE | +5.5 |
| 76–101 | NE | +5.5 |
| 101–116 | NE | +6.2 |
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.