EuroVelo 13 - Iron Curtain Trail - part Latvia, stage 2: Riga → near Roja
On stage 2 (Riga → near Roja, 115 km) the best month is September: 75% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.1 km/h on average; ERA5 2006–2025, 9:00–18:00).
← EuroVelo 13 - Iron Curtain Trail - part Latvia (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 | 0% | 21% | 51 | 0 °C | 0% | 100% | 7.3 † |
| February | 0% | 18% | 35 | 0 °C | 0% | 100% | 9.4 † |
| March | 6% | 18% | 36 | 4 °C | 0% | 93% | 11.6 |
| April | 33% | 19% | 39 | 9 °C | 0% | 63% | 14.2 |
| May | 68% | 21% | 49 | 15 °C | 0% | 15% | 16.5 |
| June | 75% | 25% | 62 | 19 °C | 0% | 0% | 17.9 |
| July | 70% | 29% | 83 | 21 °C | 0% | 0% | 17.3 |
| August | 70% | 30% | 84 | 21 °C | 0% | 0% | 15.2 |
| September | 75% | 24% | 60 | 17 °C | 0% | 2% | 12.7 |
| October | 46% | 25% | 71 | 11 °C | 0% | 40% | 10.2 † |
| November | 7% | 21% | 55 | 6 °C | 0% | 91% | 7.9 † |
| December | 0% | 21% | 51 | 2 °C | 0% | 99% | 6.7 † |
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 Riga → near Roja, km/h | Headwind > 15 km/h, Riga → near Roja | Headwind > 15 km/h, near Roja → Riga | Better way |
|---|---|---|---|---|
| January | +0.5 | 15% | 16% | either |
| February | +0.3 | 14% | 13% | either |
| March | −2.2 | 17% | 10% | near Roja → Riga |
| April | −3.7 | 18% | 6% | near Roja → Riga |
| May | −2.3 | 12% | 6% | near Roja → Riga |
| June | −3.7 | 15% | 4% | near Roja → Riga |
| July | −3.3 | 14% | 4% | near Roja → Riga |
| August | −1.3 | 11% | 7% | either |
| September | −1.1 | 15% | 10% | either |
| October | −0.5 | 16% | 14% | either |
| November | +1.5 | 12% | 16% | either |
| December | +0.6 | 15% | 17% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 142–167 | W | −3.3 |
| 167–193 | W | −2.2 |
| 193–218 | NW | 0.0 |
| 218–243 | NW | +0.8 |
| 243–257 | NW | −0.7 |
Other stages
- Ainaži → Riga 143 km
- Riga → near Roja 115 km
- near Roja → Ventspils 120 km
- Ventspils → Liepāja 128 km
- Liepāja → near Šventoji 61 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.