ABT Tappa 20: Rivisondoli - Guardiaregia: which way and when to ride
The best month for ABT Tappa 20: Rivisondoli - Guardiaregia is October: 74% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 0.5 km/h along the route (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 | 20% | 28% | 99 | 7 °C | 0% | 77% | 9.5 † |
| February | 33% | 29% | 103 | 9 °C | 0% | 60% | 10.5 † |
| March | 47% | 35% | 117 | 11 °C | 0% | 40% | 11.8 |
| April | 57% | 38% | 93 | 15 °C | 0% | 12% | 13.3 |
| May | 59% | 41% | 100 | 18 °C | 0% | 1% | 14.5 |
| June | 62% | 34% | 74 | 23 °C | 4% | 0% | 15.2 |
| July | 62% | 25% | 49 | 26 °C | 15% | 0% | 14.9 |
| August | 61% | 26% | 41 | 27 °C | 15% | 0% | 13.8 |
| September | 69% | 30% | 82 | 22 °C | 1% | 0% | 12.4 |
| October | 74% | 24% | 99 | 18 °C | 0% | 4% | 11.0 |
| November | 56% | 30% | 150 | 12 °C | 0% | 24% | 9.8 † |
| December | 30% | 23% | 102 | 9 °C | 0% | 63% | 9.2 † |
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 Rivisondoli → Guardiaregia, km/h | Headwind > 15 km/h, Rivisondoli → Guardiaregia | Headwind > 15 km/h, Guardiaregia → Rivisondoli | Better way |
|---|---|---|---|---|
| January | +0.7 | 0% | 0% | either |
| February | +0.4 | 0% | 1% | either |
| March | +0.1 | 0% | 1% | either |
| April | −0.5 | 0% | 0% | either |
| May | −0.4 | 0% | 1% | either |
| June | −0.3 | 0% | 0% | either |
| July | −0.3 | 0% | 0% | either |
| August | −0.6 | 0% | 0% | either |
| September | −0.5 | 0% | 0% | either |
| October | −0.5 | 0% | 0% | either |
| November | −0.3 | 0% | 0% | either |
| December | +0.7 | 0% | 0% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–25 | S | −1.1 |
| 25–50 | S | −0.8 |
| 50–75 | S | −1.4 |
| 75–101 | E | +0.2 |
| 101–123 | E | +0.6 |
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.