Euroroute R1 - part Estonia, stage 4: near Iisaku → Narva
On stage 4 (near Iisaku → Narva, 152 km) the best month is September: 72% of days were dry with highs of 10–30 °C, and riding near Iisaku → Narva meant an average tailwind of 3.5 km/h (ERA5 2006–2025, 9:00–18:00).
← Euroroute R1 - part Estonia (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% | 49 | -3 °C | 0% | 100% | 6.8 † |
| February | 0% | 18% | 37 | -2 °C | 0% | 100% | 9.1 † |
| March | 4% | 15% | 36 | 2 °C | 0% | 96% | 11.6 |
| April | 30% | 22% | 39 | 8 °C | 0% | 67% | 14.4 |
| May | 67% | 22% | 53 | 15 °C | 0% | 16% | 16.9 |
| June | 71% | 28% | 76 | 19 °C | 0% | 1% | 18.5 |
| July | 66% | 32% | 73 | 22 °C | 2% | 0% | 17.9 |
| August | 65% | 34% | 89 | 21 °C | 1% | 0% | 15.5 |
| September | 72% | 24% | 57 | 16 °C | 0% | 6% | 12.7 |
| October | 32% | 26% | 69 | 9 °C | 0% | 58% | 10.0 † |
| November | 3% | 24% | 58 | 4 °C | 0% | 96% | 7.5 † |
| December | 0% | 23% | 54 | 0 °C | 0% | 100% | 6.1 † |
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 near Iisaku → Narva, km/h | Headwind > 15 km/h, near Iisaku → Narva | Headwind > 15 km/h, Narva → near Iisaku | Better way |
|---|---|---|---|---|
| January | +3.9 | 5% | 19% | near Iisaku → Narva |
| February | +3.1 | 5% | 15% | near Iisaku → Narva |
| March | +3.3 | 5% | 15% | near Iisaku → Narva |
| April | +1.8 | 6% | 12% | either |
| May | +1.1 | 5% | 9% | either |
| June | +2.5 | 5% | 12% | near Iisaku → Narva |
| July | +2.1 | 4% | 10% | near Iisaku → Narva |
| August | +2.9 | 4% | 12% | near Iisaku → Narva |
| September | +3.5 | 4% | 16% | near Iisaku → Narva |
| October | +4.4 | 6% | 19% | near Iisaku → Narva |
| November | +4.6 | 5% | 20% | near Iisaku → Narva |
| December | +5.3 | 5% | 22% | near Iisaku → Narva |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 366–392 | NE | +4.8 |
| 392–418 | NE | +4.2 |
| 418–443 | N | +2.1 |
| 443–468 | E | +3.9 |
| 468–495 | E | +4.3 |
| 495–518 | SE | +1.3 |
Other stages
- Valga → near Pechory 130 km
- near Pechory → Tartu 108 km
- Tartu → near Iisaku 130 km
- near Iisaku → Narva 152 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.