Radweg D11: Ostsee – Oberbayern, stage 6: Halle (Saale) → Jena
On stage 6 (Halle (Saale) → Jena, 114 km) the best month is September: 81% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.9 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 | 7% | 21% | 49 | 4 °C | 0% | 91% | 8.4 † |
| February | 14% | 19% | 38 | 5 °C | 0% | 83% | 9.9 † |
| March | 37% | 23% | 43 | 9 °C | 0% | 56% | 11.7 |
| April | 67% | 18% | 37 | 14 °C | 0% | 22% | 13.8 |
| May | 76% | 23% | 62 | 18 °C | 0% | 3% | 15.5 |
| June | 73% | 22% | 56 | 23 °C | 6% | 0% | 16.6 |
| July | 65% | 23% | 67 | 25 °C | 13% | 0% | 16.1 |
| August | 69% | 21% | 66 | 24 °C | 10% | 0% | 14.6 |
| September | 81% | 17% | 54 | 20 °C | 2% | 0% | 12.6 |
| October | 71% | 19% | 51 | 14 °C | 0% | 15% | 10.6 † |
| November | 29% | 18% | 45 | 8 °C | 0% | 66% | 8.8 † |
| December | 8% | 20% | 50 | 5 °C | 0% | 88% | 7.9 † |
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 Halle (Saale) → Jena, km/h | Headwind > 15 km/h, Halle (Saale) → Jena | Headwind > 15 km/h, Jena → Halle (Saale) | Better way |
|---|---|---|---|---|
| January | −5.8 | 21% | 2% | Jena → Halle (Saale) |
| February | −4.4 | 16% | 3% | Jena → Halle (Saale) |
| March | −1.9 | 11% | 4% | either |
| April | +0.6 | 6% | 4% | either |
| May | +0.5 | 6% | 4% | either |
| June | −0.4 | 6% | 2% | either |
| July | −2.0 | 8% | 1% | Jena → Halle (Saale) |
| August | −2.4 | 7% | 1% | Jena → Halle (Saale) |
| September | −1.9 | 7% | 2% | either |
| October | −4.5 | 13% | 2% | Jena → Halle (Saale) |
| November | −5.8 | 15% | 1% | Jena → Halle (Saale) |
| December | −7.1 | 21% | 1% | Jena → Halle (Saale) |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 666–691 | S | +0.3 |
| 691–716 | SW | −2.2 |
| 716–742 | SW | −4.0 |
| 742–767 | S | −1.2 |
| 767–780 | SW | −2.5 |
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.