Sjællands Odde - Rødby: which way and when to ride
The best month for Sjællands Odde - Rødby is September: 79% of days were dry with highs of 10–30 °C. In September, riding Rødbyhavn → near Nykøbing Sjælland meant an average tailwind of 3.4 km/h (ERA5 2006–2025, daytime 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 | 1% | 22% | 57 | 3 °C | 0% | 99% | 7.7 † |
| February | 1% | 16% | 42 | 4 °C | 0% | 98% | 9.6 † |
| March | 13% | 17% | 39 | 7 °C | 0% | 86% | 11.7 |
| April | 53% | 19% | 36 | 11 °C | 0% | 41% | 14.1 |
| May | 74% | 23% | 52 | 16 °C | 0% | 6% | 16.2 |
| June | 79% | 21% | 61 | 19 °C | 0% | 0% | 17.4 |
| July | 74% | 25% | 78 | 21 °C | 1% | 0% | 16.9 |
| August | 74% | 26% | 78 | 21 °C | 0% | 0% | 15.0 |
| September | 79% | 21% | 57 | 18 °C | 0% | 0% | 12.6 |
| October | 67% | 22% | 64 | 13 °C | 0% | 14% | 10.3 † |
| November | 21% | 22% | 52 | 8 °C | 0% | 72% | 8.2 † |
| December | 3% | 20% | 53 | 5 °C | 0% | 96% | 7.1 † |
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 near Nykøbing Sjælland → Rødbyhavn, km/h | Headwind > 15 km/h, near Nykøbing Sjælland → Rødbyhavn | Headwind > 15 km/h, Rødbyhavn → near Nykøbing Sjælland | Better way |
|---|---|---|---|---|
| January | −4.4 | 26% | 11% | Rødbyhavn → near Nykøbing Sjælland |
| February | −3.5 | 24% | 12% | Rødbyhavn → near Nykøbing Sjælland |
| March | −1.9 | 20% | 12% | either |
| April | −0.8 | 14% | 11% | either |
| May | −0.7 | 14% | 11% | either |
| June | −1.2 | 14% | 10% | either |
| July | −2.2 | 16% | 9% | Rødbyhavn → near Nykøbing Sjælland |
| August | −3.4 | 19% | 8% | Rødbyhavn → near Nykøbing Sjælland |
| September | −3.4 | 21% | 10% | Rødbyhavn → near Nykøbing Sjælland |
| October | −4.6 | 25% | 10% | Rødbyhavn → near Nykøbing Sjælland |
| November | −4.8 | 25% | 9% | Rødbyhavn → near Nykøbing Sjælland |
| December | −5.0 | 27% | 9% | Rødbyhavn → near Nykøbing Sjælland |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | SE | +3.4 |
| 25–50 | S | −4.9 |
| 50–76 | S | −5.6 |
| 76–101 | S | −2.3 |
| 101–126 | SE | +0.2 |
| 126–151 | S | −2.2 |
| 151–176 | S | −4.8 |
| 176–202 | SW | −6.6 |
| 202–228 | SW | −7.3 |
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.