EuroVelo 1 - Atlantic Coast Route - part Ireland, stage 19: Gweedore → Londonderry County Borough
On stage 19 (Gweedore → Londonderry County Borough, 139 km) the best month is September: 63% of days were dry with highs of 10–30 °C, and riding Gweedore → Londonderry County Borough meant an average tailwind of 4.9 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 | 9% | 38% | 115 | 7 °C | 0% | 83% | 7.7 † |
| February | 12% | 38% | 100 | 8 °C | 0% | 79% | 9.6 † |
| March | 23% | 40% | 92 | 9 °C | 0% | 67% | 11.7 |
| April | 47% | 34% | 75 | 11 °C | 0% | 36% | 14.0 |
| May | 56% | 39% | 92 | 14 °C | 0% | 10% | 16.1 |
| June | 62% | 38% | 93 | 16 °C | 0% | 0% | 17.3 |
| July | 57% | 43% | 113 | 17 °C | 0% | 0% | 16.8 |
| August | 55% | 45% | 124 | 17 °C | 0% | 0% | 14.9 |
| September | 63% | 37% | 99 | 15 °C | 0% | 0% | 12.6 |
| October | 55% | 40% | 122 | 13 °C | 0% | 8% | 10.3 † |
| November | 27% | 41% | 122 | 10 °C | 0% | 53% | 8.3 † |
| December | 12% | 42% | 126 | 8 °C | 0% | 74% | 7.2 † |
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 Gweedore → Londonderry County Borough, km/h | Headwind > 15 km/h, Gweedore → Londonderry County Borough | Headwind > 15 km/h, Londonderry County Borough → Gweedore | Better way |
|---|---|---|---|---|
| January | +5.5 | 10% | 27% | Gweedore → Londonderry County Borough |
| February | +4.1 | 14% | 27% | Gweedore → Londonderry County Borough |
| March | +3.2 | 13% | 24% | Gweedore → Londonderry County Borough |
| April | +1.6 | 13% | 18% | either |
| May | +2.7 | 11% | 20% | Gweedore → Londonderry County Borough |
| June | +3.7 | 8% | 20% | Gweedore → Londonderry County Borough |
| July | +5.1 | 5% | 21% | Gweedore → Londonderry County Borough |
| August | +5.9 | 6% | 25% | Gweedore → Londonderry County Borough |
| September | +4.9 | 8% | 24% | Gweedore → Londonderry County Borough |
| October | +3.3 | 12% | 23% | Gweedore → Londonderry County Borough |
| November | +4.0 | 11% | 24% | Gweedore → Londonderry County Borough |
| December | +5.1 | 10% | 27% | Gweedore → Londonderry County Borough |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 2,185–2,210 | NE | +10.3 |
| 2,210–2,236 | E | +7.7 |
| 2,236–2,261 | SE | +2.2 |
| 2,261–2,287 | S | −3.4 |
| 2,287–2,312 | NE | +6.9 |
| 2,312–2,324 | E | +5.9 |
Other stages
- Ballygerry → Trá Mhór 130 km
- Trá Mhór → Midleton 129 km
- Midleton → Clonakilty 137 km
- Clonakilty → near Schull 122 km
- near Schull → Castletownbere 122 km
- Castletownbere → near Killorglin 122 km
- near Killorglin → Killorglin 115 km
- Killorglin → Tralee 109 km
- Tralee → Limerick 120 km
- Limerick → Kilrush 110 km
- Kilrush → Lehinch 120 km
- Lehinch → Galway 127 km
- Galway → near Clifden 121 km
- near Clifden → Westport 109 km
- Westport → near Knocknalower 122 km
- near Knocknalower → near Ballina 121 km
- near Ballina → Ballyshannon 137 km
- Ballyshannon → Gweedore 121 km
- Gweedore → Londonderry County Borough 139 km
- Londonderry County Borough → Cookstown 112 km
- Cookstown → Belfast 96 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.