55 Slezská magistrála (Jeseník - Hlučín): which way and when to ride
The best month for 55 Slezská magistrála (Jeseník - Hlučín) is September: 75% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 2.0 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 | 1% | 21% | 47 | 1 °C | 0% | 98% | 8.5 † |
| February | 6% | 19% | 40 | 3 °C | 0% | 93% | 10.0 † |
| March | 30% | 23% | 49 | 8 °C | 0% | 66% | 11.7 |
| April | 61% | 25% | 56 | 13 °C | 0% | 27% | 13.7 |
| May | 64% | 33% | 87 | 17 °C | 0% | 6% | 15.4 |
| June | 63% | 35% | 101 | 22 °C | 3% | 0% | 16.4 |
| July | 59% | 35% | 106 | 24 °C | 8% | 0% | 16.0 |
| August | 62% | 32% | 104 | 23 °C | 7% | 0% | 14.5 |
| September | 75% | 24% | 92 | 19 °C | 1% | 3% | 12.5 |
| October | 63% | 19% | 58 | 13 °C | 0% | 27% | 10.6 † |
| November | 25% | 17% | 47 | 7 °C | 0% | 71% | 8.9 † |
| December | 3% | 17% | 40 | 3 °C | 0% | 97% | 8.1 † |
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 Hlučín → Jeseník, km/h | Headwind > 15 km/h, Hlučín → Jeseník | Headwind > 15 km/h, Jeseník → Hlučín | Better way |
|---|---|---|---|---|
| January | −4.2 | 9% | 0% | Jeseník → Hlučín |
| February | −3.8 | 11% | 0% | Jeseník → Hlučín |
| March | −3.4 | 10% | 2% | Jeseník → Hlučín |
| April | −2.6 | 9% | 2% | Jeseník → Hlučín |
| May | −2.0 | 8% | 2% | Jeseník → Hlučín |
| June | −2.7 | 7% | 0% | Jeseník → Hlučín |
| July | −4.1 | 8% | 0% | Jeseník → Hlučín |
| August | −1.9 | 4% | 1% | either |
| September | −2.0 | 6% | 1% | either |
| October | −2.1 | 6% | 1% | Jeseník → Hlučín |
| November | −2.0 | 6% | 1% | Jeseník → Hlučín |
| December | −3.4 | 8% | 1% | Jeseník → Hlučín |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–23 | NW | −1.8 |
| 23–48 | NW | −1.7 |
| 48–73 | NW | −1.5 |
| 73–99 | W | −2.6 |
| 99–121 | W | −2.4 |
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.