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Best Time for Donegal & the Northwest
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Sweet spot: March, April, May. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- Longer daylight gives the most margin for the coast, Glenveagh and Inishowen, but wind, rain, visibility, parking and shuttle access still need a live check.
- The route remains a road journey, but short daylight and Atlantic weather require a conservative plan; skip exposed cliff or upland walks whenever local conditions are unsuitable.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | 3.7°C | 6.9°C | 130 mm | 7.5 h | 💨 |
| February | 3.3°C | 6.9°C | 100 mm | 9.3 h | |
| March | 3.8°C | 8.2°C | 94 mm | 11.5 h | |
| April | 5.3°C | 10.5°C | 74 mm | 13.8 h | |
| May | 7.7°C | 13.1°C | 93 mm | 15.9 h | |
| June | 10.3°C | 15.4°C | 100 mm | 17.0 h | |
| July | 11.8°C | 16.7°C | 112 mm | 16.5 h | |
| August | 11.8°C | 16.6°C | 122 mm | 14.7 h | |
| September | 10.5°C | 15.1°C | 102 mm | 12.4 h | |
| October | 8.3°C | 12.2°C | 126 mm | 10.1 h | |
| November | 6.1°C | 9.3°C | 135 mm | 8.1 h | |
| December | 4.3°C | 7.5°C | 134 mm | 7.0 h |