Radweg D11: Ostsee – Oberbayern, stage 7: Jena → Rosenthal
On stage 7 (Jena → Rosenthal, 137 km) the best month is September: 78% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.1 km/h on average; ERA5 2006–2025, 9:00–18:00).
← Radweg D11: Ostsee – Oberbayern (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 | 3% | 25% | 58 | 2 °C | 0% | 97% | 8.4 † |
| February | 8% | 20% | 43 | 4 °C | 0% | 91% | 10.0 † |
| March | 29% | 25% | 48 | 8 °C | 0% | 66% | 11.7 |
| April | 55% | 26% | 49 | 13 °C | 0% | 32% | 13.7 |
| May | 65% | 32% | 79 | 17 °C | 0% | 7% | 15.5 |
| June | 66% | 31% | 76 | 21 °C | 3% | 0% | 16.4 |
| July | 62% | 31% | 86 | 23 °C | 8% | 0% | 16.1 |
| August | 65% | 29% | 84 | 23 °C | 7% | 0% | 14.5 |
| September | 78% | 22% | 65 | 18 °C | 0% | 2% | 12.5 |
| October | 59% | 23% | 58 | 13 °C | 0% | 27% | 10.6 † |
| November | 21% | 20% | 51 | 7 °C | 0% | 75% | 8.9 † |
| December | 3% | 22% | 58 | 3 °C | 0% | 95% | 8.0 † |
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 Jena → Rosenthal, km/h | Headwind > 15 km/h, Jena → Rosenthal | Headwind > 15 km/h, Rosenthal → Jena | Better way |
|---|---|---|---|---|
| January | −2.4 | 14% | 5% | Rosenthal → Jena |
| February | −1.8 | 11% | 6% | either |
| March | 0.0 | 9% | 7% | either |
| April | +1.3 | 5% | 6% | either |
| May | +1.4 | 5% | 6% | either |
| June | +1.4 | 4% | 4% | either |
| July | +0.9 | 4% | 4% | either |
| August | 0.0 | 4% | 2% | either |
| September | −0.1 | 5% | 4% | either |
| October | −2.2 | 9% | 4% | Rosenthal → Jena |
| November | −3.2 | 11% | 4% | Rosenthal → Jena |
| December | −3.5 | 15% | 4% | Rosenthal → Jena |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 780–805 | S | −1.6 |
| 805–831 | SW | −3.1 |
| 831–856 | SE | +2.4 |
| 856–881 | E | +2.9 |
| 881–906 | S | 0.0 |
| 906–917 | SW | −2.6 |
Other stages
- Warnemünde → Waren 142 km
- Waren → Zehdenick 138 km
- Zehdenick → Potsdam 122 km
- Potsdam → Gräfenhainichen 124 km
- Gräfenhainichen → Halle (Saale) 142 km
- Halle (Saale) → Jena 114 km
- Jena → Rosenthal 137 km
- Rosenthal → Lichtenfels 134 km
- Lichtenfels → Nuremberg 117 km
- Nuremberg → Kelheim 128 km
- Kelheim → Freising 127 km
- Freising → Rosenheim 105 km
- Rosenheim → Freilassing 90 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.