Best Time to Hike Ordesa Canyon & Monte Perdido
The best time to hike Ordesa Canyon & Monte Perdido is June to October, the window given in the official season guidance. These months bring the warmest conditions of the year, long daylight, and the driest stretch in July and August, though high ground can behave differently from the canyon floor.
Month-by-month climate for Ordesa Canyon & Monte Perdido
| Month | Relative warmth | Rain | Daylight |
|---|---|---|---|
| Jan | Coldest | 65 mm | 9.2 h |
| Feb | Coldest | 49 mm | 10.3 h |
| Mar | Cool | 56 mm | 11.7 h |
| Apr | Mild | 66 mm | 13.2 h |
| May | Mild | 64 mm | 14.4 h |
| Jun | Warmest | 63 mm | 15.1 h |
| Jul | Warmest | 40 mm | 14.8 h |
| Aug | Warmest | 35 mm | 13.7 h |
| Sep | Warm | 47 mm | 12.3 h |
| Oct | Mild | 59 mm | 10.8 h |
| Nov | Cool | 75 mm | 9.5 h |
| Dec | Coldest | 55 mm | 8.9 h |
Modelled regional averages for 2010–2023 (rainfall) and calculated daylight hours; they describe the wider area, not a reading taken on the trail. “Relative warmth” compares each month with the warmest and coldest months of this place’s own year. It is not a temperature, and the high parts of a route are colder than the region around them.
The modelled regional averages show a clear dry spell in summer: July (40 mm) and August (35 mm) are the driest months, while November is the wettest at 75 mm, with April, May and June also relatively wet at 63 to 66 mm. Daylight swings from about 8.9 hours in December to 15.1 hours in June. June through August are the relatively warmest months of this place's year, while December, January and February are the coldest. These are regional averages, not trail measurements.
Ordesa Canyon & Monte Perdido season by season
Early summer · June
June opens the official season and gives the longest days of the year, with about 15.1 hours of daylight on average. It is among the relatively warmest months, but rainfall is still around 63 mm, similar to April and May, so showers remain a realistic part of the picture. This is a good month for long, non-technical canyon days because the extra light gives generous margin. Higher routes can still hold seasonal surprises, so check the managing authority's guidance before heading up toward Monte Perdido.
High summer · July to August
July and August are the driest months in the modelled data, at roughly 40 mm and 35 mm, and both sit among the relatively warmest of this place's year. Daylight is still long, about 14.8 hours in July and 13.7 in August. That combination suits the full-length canyon walk and any serious alpine objective. The trade-off is that the canyon is typically busiest in this period, and the permits and rules text notes that car access into the canyon is restricted in busy periods, so check the park's access guide before you plan your arrival.
Early autumn · September to October
September is still relatively warm, with rainfall easing to about 47 mm, which makes it a strong shoulder choice within the official June to October window. By October conditions are mild rather than warm, rainfall rises to around 59 mm, and daylight drops to roughly 10.8 hours. Shorter days mean less margin for a long out-and-back walk, so an early start matters more. Check the managing authority's guidance near the end of the season, as the official window closes with October.
Cold season and spring · November to May
Outside the official June to October window, the data point to a very different hike. December through February are the coldest months of the year here, daylight falls to about 8.9 hours in December, and November is the wettest month at 75 mm. March is cool, and April and May turn mild but remain relatively wet at around 64 to 66 mm. Because this is outside the recommended season, treat any trip in these months as a conditions-dependent plan and confirm access and guidance with the managing authority first.
Official season guidance
Spanish National Parks Network (MITECO): June to October
No permit is needed for the canyon walks, but car access into the canyon is restricted in busy periods, so check the park’s access guide. The classic walk to the Cola de Caballo waterfall is long but non-technical; climbing Monte Perdido is a serious alpine undertaking.
Check current dates on miteco.gob.es (Ordesa y Monte Perdido visitor guide)What to pack for the season
Pack for the season you choose rather than for an average day. In the June to October window, bring layers you can add or shed, reliable rain cover for the wetter shoulder months, and sun protection for long exposed stretches. In September and October, carry a headlamp, since daylight shortens noticeably and a delayed return can run into dusk.
For layering, rain cover and weather planning, see hiking in rain, heat and cold.
Timing mistakes to avoid
The most common mistake is treating the whole June to October window as equal. Early June and late October have noticeably different daylight and rainfall from July and August, so build your pacing around the month you actually choose. Another is ignoring the park's access guidance: car access into the canyon is restricted in busy periods, which can change your start time and logistics. Finally, do not assume the canyon walk and Monte Perdido share the same conditions; the climb is a serious alpine undertaking, so confirm current guidance with the managing authority.
Common questions
Is July or August better for hiking Ordesa Canyon?
Both are among the driest and relatively warmest months, with roughly 40 mm of rain in July and 35 mm in August on average. August has slightly less daylight, about 13.7 hours versus 14.8 in July. Pick based on how much daylight you want and how busy you can tolerate.
Can I hike Ordesa Canyon in spring?
April and May are mild but relatively wet, at around 64 to 66 mm of rain on average, and both fall outside the official June to October season guidance. Conditions on higher ground may differ from the canyon floor, so confirm current access with the managing authority before planning.
How much daylight will I have in October?
October averages about 10.8 hours of daylight, noticeably less than the 15.1 hours of June. That shorter window leaves less margin for a long canyon walk, so start early, carry a headlamp, and plan a turnaround time that gets you back before dusk.
Do I need a permit, and does timing affect access?
No permit is needed for the canyon walks, but car access into the canyon is restricted in busy periods, so check the park's access guide before you go. Timing matters because the busiest stretches of the season are when these access limits are most likely to apply.
Sources
- Spanish National Parks Network (MITECO) — miteco.gob.es (Ordesa y Monte Perdido visitor guide): official season and permit guidance.
- NASA POWER (Prediction Of Worldwide Energy Resources): monthly temperature and rainfall averages, 2010–2023, from MERRA-2 reanalysis. Daylight hours are calculated from latitude.
Conditions, closures and permit rules change without notice — confirm current information with the managing authority before you go. See our editorial policy and affiliate disclosure.