Euroroute R1 - part Latvia, stage 3: Jūrmala → Cēsis
On stage 3 (Jūrmala → Cēsis, 133 km) the best month is September: 72% of days were dry with highs of 10–30 °C, and riding Jūrmala → Cēsis meant an average tailwind of 3.7 km/h (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 | 0% | 24% | 56 | -1 °C | 0% | 100% | 7.3 † |
| February | 0% | 21% | 41 | -1 °C | 0% | 100% | 9.4 † |
| March | 10% | 21% | 42 | 4 °C | 0% | 89% | 11.6 |
| April | 45% | 22% | 45 | 11 °C | 0% | 49% | 14.2 |
| May | 68% | 25% | 57 | 16 °C | 0% | 11% | 16.5 |
| June | 72% | 27% | 75 | 20 °C | 2% | 0% | 17.9 |
| July | 63% | 34% | 93 | 23 °C | 3% | 0% | 17.3 |
| August | 67% | 31% | 93 | 22 °C | 2% | 0% | 15.2 |
| September | 72% | 26% | 63 | 17 °C | 0% | 3% | 12.7 |
| October | 41% | 28% | 75 | 10 °C | 0% | 44% | 10.2 † |
| November | 5% | 22% | 57 | 5 °C | 0% | 93% | 7.9 † |
| December | 0% | 24% | 54 | 1 °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 Jūrmala → Cēsis, km/h | Headwind > 15 km/h, Jūrmala → Cēsis | Headwind > 15 km/h, Cēsis → Jūrmala | Better way |
|---|---|---|---|---|
| January | +4.1 | 5% | 18% | Jūrmala → Cēsis |
| February | +3.4 | 3% | 16% | Jūrmala → Cēsis |
| March | +4.1 | 5% | 18% | Jūrmala → Cēsis |
| April | +3.2 | 5% | 15% | Jūrmala → Cēsis |
| May | +2.1 | 5% | 10% | Jūrmala → Cēsis |
| June | +4.3 | 4% | 15% | Jūrmala → Cēsis |
| July | +3.7 | 3% | 13% | Jūrmala → Cēsis |
| August | +4.0 | 3% | 14% | Jūrmala → Cēsis |
| September | +3.7 | 5% | 17% | Jūrmala → Cēsis |
| October | +4.9 | 5% | 20% | Jūrmala → Cēsis |
| November | +4.6 | 3% | 17% | Jūrmala → Cēsis |
| December | +5.5 | 3% | 20% | Jūrmala → Cēsis |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 272–297 | E | +3.1 |
| 297–323 | NE | +3.9 |
| 323–349 | NE | +3.7 |
| 349–374 | E | +3.9 |
| 374–399 | NE | +4.0 |
| 399–405 | N | +4.0 |
Other stages
- near Šventoji → Kuldīga 140 km
- Kuldīga → Jūrmala 135 km
- Jūrmala → Cēsis 133 km
- Cēsis → Valga 83 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.