Greenway Rosenberg Heritage: which way and when to ride
The best month for Greenway Rosenberg Heritage is September: 76% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.1 km/h along the route (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 | 2% | 20% | 49 | 2 °C | 0% | 97% | 8.7 † |
| February | 9% | 17% | 34 | 4 °C | 0% | 90% | 10.1 † |
| March | 34% | 20% | 43 | 8 °C | 0% | 62% | 11.7 |
| April | 62% | 24% | 49 | 14 °C | 0% | 26% | 13.6 |
| May | 64% | 34% | 91 | 17 °C | 0% | 6% | 15.3 |
| June | 65% | 31% | 97 | 22 °C | 4% | 0% | 16.2 |
| July | 61% | 32% | 96 | 24 °C | 8% | 0% | 15.8 |
| August | 64% | 29% | 91 | 23 °C | 8% | 0% | 14.4 |
| September | 76% | 23% | 72 | 19 °C | 0% | 3% | 12.5 |
| October | 63% | 18% | 47 | 13 °C | 0% | 26% | 10.7 † |
| November | 22% | 16% | 44 | 7 °C | 0% | 77% | 9.1 † |
| December | 2% | 18% | 44 | 3 °C | 0% | 97% | 8.3 † |
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 Tábor → Jindřichův Hradec, km/h | Headwind > 15 km/h, near Tábor → Jindřichův Hradec | Headwind > 15 km/h, Jindřichův Hradec → near Tábor | Better way |
|---|---|---|---|---|
| January | +0.6 | 3% | 5% | either |
| February | +0.5 | 3% | 4% | either |
| March | +0.4 | 4% | 5% | either |
| April | +0.3 | 3% | 4% | either |
| May | +0.2 | 3% | 3% | either |
| June | +0.4 | 1% | 2% | either |
| July | +0.6 | 1% | 2% | either |
| August | +0.2 | 1% | 1% | either |
| September | +0.1 | 2% | 2% | either |
| October | +0.1 | 2% | 3% | either |
| November | +0.1 | 2% | 3% | either |
| December | +0.4 | 2% | 4% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–26 | S | +0.7 |
| 26–51 | S | +0.3 |
| 51–77 | W | −1.0 |
| 77–102 | S | +0.5 |
| 102–127 | S | +0.1 |
| 127–152 | SE | +1.5 |
| 152–178 | NE | 0.0 |
| 178–203 | N | −0.9 |
| 203–228 | N | −0.8 |
| 228–255 | NE | +0.8 |
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.