EuroVelo 4 - Central Europe Route - part Czech Republic, stage 4: Čáslav → Bystřice nad Pernštejnem
On stage 4 (Čáslav → Bystřice nad Pernštejnem, 127 km) the best month is September: 75% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.6 km/h on average; ERA5 2006–2025, 9:00–18:00).
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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% | 50 | 1 °C | 0% | 98% | 8.6 † |
| February | 4% | 18% | 38 | 3 °C | 0% | 94% | 10.0 † |
| March | 29% | 24% | 48 | 8 °C | 0% | 68% | 11.7 |
| April | 59% | 26% | 49 | 13 °C | 0% | 28% | 13.7 |
| May | 63% | 34% | 84 | 17 °C | 0% | 6% | 15.3 |
| June | 67% | 31% | 88 | 21 °C | 2% | 0% | 16.3 |
| July | 64% | 31% | 94 | 23 °C | 6% | 0% | 15.9 |
| August | 65% | 29% | 96 | 23 °C | 6% | 0% | 14.4 |
| September | 75% | 24% | 81 | 18 °C | 0% | 3% | 12.5 |
| October | 57% | 21% | 51 | 12 °C | 0% | 31% | 10.6 † |
| November | 17% | 19% | 46 | 6 °C | 0% | 81% | 9.0 † |
| December | 1% | 19% | 45 | 2 °C | 0% | 98% | 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 Čáslav → Bystřice nad Pernštejnem, km/h | Headwind > 15 km/h, Čáslav → Bystřice nad Pernštejnem | Headwind > 15 km/h, Bystřice nad Pernštejnem → Čáslav | Better way |
|---|---|---|---|---|
| January | +3.1 | 7% | 18% | Čáslav → Bystřice nad Pernštejnem |
| February | +2.9 | 8% | 18% | Čáslav → Bystřice nad Pernštejnem |
| March | +3.1 | 9% | 18% | Čáslav → Bystřice nad Pernštejnem |
| April | +2.2 | 7% | 15% | Čáslav → Bystřice nad Pernštejnem |
| May | +1.7 | 9% | 13% | either |
| June | +3.3 | 3% | 11% | Čáslav → Bystřice nad Pernštejnem |
| July | +5.1 | 2% | 14% | Čáslav → Bystřice nad Pernštejnem |
| August | +2.5 | 2% | 7% | Čáslav → Bystřice nad Pernštejnem |
| September | +1.6 | 7% | 11% | either |
| October | +0.4 | 11% | 11% | either |
| November | −0.4 | 12% | 12% | either |
| December | +1.7 | 9% | 15% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 384–409 | E | +1.9 |
| 409–435 | SE | +1.6 |
| 435–460 | SE | +1.4 |
| 460–485 | SE | +1.3 |
| 485–511 | E | +1.7 |
Other stages
- Hohenberg an der Eger → Žlutice 110 km
- Žlutice → Modřany 146 km
- Modřany → Čáslav 128 km
- Čáslav → Bystřice nad Pernštejnem 127 km
- Bystřice nad Pernštejnem → Bučovice 122 km
- Bučovice → Kroměříž 118 km
- Kroměříž → Starý Bohumín 144 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.