Euroroute R1 - part Latvia: which way and when to ride
The best month for Euroroute R1 - part Latvia is September: 74% of days were dry with highs of 10–30 °C. In September, riding near Šventoji → Valga meant an average tailwind of 3.8 km/h (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 | 0% | 22% | 54 | -1 °C | 0% | 100% | 7.4 † |
| February | 0% | 19% | 39 | 0 °C | 0% | 100% | 9.4 † |
| March | 9% | 19% | 38 | 4 °C | 0% | 90% | 11.6 |
| April | 43% | 20% | 40 | 10 °C | 0% | 52% | 14.2 |
| May | 69% | 23% | 52 | 16 °C | 0% | 12% | 16.5 |
| June | 73% | 26% | 68 | 20 °C | 1% | 0% | 17.8 |
| July | 66% | 33% | 89 | 22 °C | 2% | 0% | 17.3 |
| August | 67% | 32% | 90 | 21 °C | 1% | 0% | 15.2 |
| September | 74% | 25% | 60 | 17 °C | 0% | 2% | 12.7 |
| October | 43% | 26% | 70 | 10 °C | 0% | 42% | 10.2 † |
| November | 7% | 21% | 54 | 5 °C | 0% | 91% | 8.0 † |
| December | 0% | 23% | 53 | 2 °C | 0% | 100% | 6.8 † |
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 near Šventoji → Valga, km/h | Headwind > 15 km/h, near Šventoji → Valga | Headwind > 15 km/h, Valga → near Šventoji | Better way |
|---|---|---|---|---|
| January | +4.6 | 6% | 22% | near Šventoji → Valga |
| February | +3.8 | 5% | 19% | near Šventoji → Valga |
| March | +3.9 | 6% | 20% | near Šventoji → Valga |
| April | +2.4 | 7% | 16% | near Šventoji → Valga |
| May | +1.7 | 6% | 12% | either |
| June | +3.7 | 5% | 16% | near Šventoji → Valga |
| July | +3.3 | 4% | 14% | near Šventoji → Valga |
| August | +4.0 | 4% | 16% | near Šventoji → Valga |
| September | +3.8 | 5% | 19% | near Šventoji → Valga |
| October | +5.1 | 6% | 23% | near Šventoji → Valga |
| November | +5.0 | 4% | 20% | near Šventoji → Valga |
| December | +6.1 | 4% | 24% | near Šventoji → Valga |
Stages
The route is split into 4 stages of about 100–150 km between towns; each stage has its own page.
| Stage | km | Best month | Tailwind near Šventoji → Valga in September, km/h |
|---|---|---|---|
| 1. near Šventoji → Kuldīga | 140 | June | +3.7 |
| 2. Kuldīga → Jūrmala | 135 | September | +3.4 |
| 3. Jūrmala → Cēsis | 133 | September | +3.7 |
| 4. Cēsis → Valga | 83 | September | +4.6 |
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.