Euroroute R1 - part Estonia, stage 3: Tartu → near Iisaku
On stage 3 (Tartu → near Iisaku, 130 km) the best month is September: 74% of days were dry with highs of 10–30 °C, and riding Tartu → near Iisaku meant an average tailwind of 3.3 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% | 47 | -2 °C | 0% | 100% | 7.0 † |
| February | 0% | 17% | 36 | -2 °C | 0% | 100% | 9.2 † |
| March | 4% | 15% | 33 | 3 °C | 0% | 96% | 11.6 |
| April | 32% | 21% | 40 | 9 °C | 0% | 65% | 14.3 |
| May | 70% | 22% | 51 | 16 °C | 0% | 12% | 16.8 |
| June | 73% | 27% | 74 | 20 °C | 0% | 1% | 18.4 |
| July | 68% | 31% | 70 | 22 °C | 1% | 0% | 17.7 |
| August | 68% | 31% | 84 | 21 °C | 0% | 0% | 15.4 |
| September | 74% | 21% | 48 | 16 °C | 0% | 5% | 12.7 |
| October | 34% | 23% | 60 | 9 °C | 0% | 56% | 10.1 † |
| November | 3% | 20% | 54 | 4 °C | 0% | 97% | 7.6 † |
| December | 0% | 20% | 49 | 0 °C | 0% | 100% | 6.3 † |
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 Tartu → near Iisaku, km/h | Headwind > 15 km/h, Tartu → near Iisaku | Headwind > 15 km/h, near Iisaku → Tartu | Better way |
|---|---|---|---|---|
| January | +4.5 | 6% | 22% | Tartu → near Iisaku |
| February | +3.5 | 6% | 17% | Tartu → near Iisaku |
| March | +2.7 | 7% | 17% | Tartu → near Iisaku |
| April | +0.8 | 9% | 13% | either |
| May | +0.5 | 8% | 10% | either |
| June | +1.9 | 8% | 14% | either |
| July | +1.6 | 6% | 12% | either |
| August | +2.9 | 5% | 14% | Tartu → near Iisaku |
| September | +3.3 | 7% | 17% | Tartu → near Iisaku |
| October | +4.6 | 7% | 21% | Tartu → near Iisaku |
| November | +5.4 | 5% | 22% | Tartu → near Iisaku |
| December | +5.9 | 5% | 25% | Tartu → near Iisaku |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 236–262 | NE | +5.0 |
| 262–287 | NE | +4.8 |
| 287–313 | NW | +1.3 |
| 313–338 | NW | +0.6 |
| 338–366 | E | +4.5 |
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.