January in Sumidero Canyon — middling scores, decent value
Trade-offs · 6.8/10January averages 19°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 142 mm this is a genuinely wet month: about 18 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.8/10 here, 7th of 12 months, against 9.2/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 2.4 points higher here — enough to change the trip.
February in Sumidero Canyon: strong conditions, 4th of 12
Good · 7.4/10February averages 19°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 136 mm — wet for this destination — but about 21 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.4/10 here, 4th of 12 months, against 9.2/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 1.8 points higher here — enough to change the trip.
March: the best month of the year in Sumidero Canyon
Best window · 9.2/10Trail conditions at 21°C (70°F) favour early starts and shaded routes in March; midday is for water breaks, not for exposed climbs.
With around 43 mm of rain, any showers tend to pass through rather than settle in; about 29 days with 6+ hours of sunshine and 11.9 hours of daylight fill the rest.
On our climate-comfort scale this is the top-ranked month of the year for Sumidero Canyon at 9.2/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection, footwear you can get muddy.
April ranks 2nd of 12 for Sumidero Canyon — one of the best windows
Best window · 8.9/10April averages 23°C (74°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Rainfall runs 46 mm, so plan one flexible day in three; you still get about 30 days with 6+ hours of sunshine and 12.4 hours of daylight.
A 8.9/10 puts this among the year's best months in Sumidero Canyon (2nd of 12); only March scores higher, at 9.2/10.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection, a packable rain layer, footwear you can get muddy.
May holds up well in Sumidero Canyon — 3rd best month
Good · 7.6/10Trail conditions at 25°C (77°F) favour early starts and shaded routes in May; midday is for water breaks, not for exposed climbs.
Budget for roughly 72 mm of rain this month — a flexible day or two helps — with about 28 days with 6+ hours of sunshine and 12.8 hours of daylight to work around it.
That is 7.6/10 on the same scale — 3rd of 12 months, versus 9.2/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a packable rain layer, footwear you can get muddy.
If your dates are flexible, March is materially better in Sumidero Canyon — 1.6 points higher on the same scale.
June in Sumidero Canyon — middling scores, decent value
Trade-offs · 6.5/10June averages 24°C (74°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
286 mm makes this the wettest stretch of the year, though about 23 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 6.5/10 here, 9th of 12 months, against 9.2/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 2.7 points higher here — enough to change the trip.
July in Sumidero Canyon: mixed conditions, plan around the weather
Trade-offs · 6.9/10July averages 23°C (73°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
209 mm makes this the wettest stretch of the year, though about 26 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 6.9/10 here, 6th of 12 months, against 9.2/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 2.3 points higher here — enough to change the trip.
August in Sumidero Canyon — workable with trade-offs
Trade-offs · 6.8/10Trail conditions at 23°C (73°F) favour early starts and shaded routes in August; midday is for water breaks, not for exposed climbs.
This is the year's wettest stretch at 219 mm, but with about 26 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6.8/10 on the same scale — 8th of 12 months, versus 9.2/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, March is materially better in Sumidero Canyon — 2.4 points higher on the same scale.
September in Sumidero Canyon: mixed conditions, plan around the weather
Trade-offs · 6.4/10Trail conditions at 22°C (72°F) favour early starts and shaded routes in September; midday is for water breaks, not for exposed climbs.
This is the year's wettest stretch at 302 mm, but with about 20 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6.4/10 on the same scale — 10th of 12 months, versus 9.2/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, March is materially better in Sumidero Canyon — 2.8 points higher on the same scale.
October in Sumidero Canyon — middling scores, decent value
Trade-offs · 5.9/10October averages 21°C (70°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
256 mm of rain puts this in monsoon territory — about 15 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 5.9/10 here, 12th of 12 months, against 9.2/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 3.3 points higher here — enough to change the trip.
November in Sumidero Canyon — workable with trade-offs
Trade-offs · 6.2/10November averages 20°C (68°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
At 166 mm this is a genuinely wet month: about 15 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.2/10 here, 11th of 12 months, against 9.2/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? March scores 3 points higher here — enough to change the trip.
December in Sumidero Canyon — reliably good (5th best month)
Good · 7/10Temperatures hover around 19°C (65°F) — the kind of month where neither heat nor cold forces the schedule.
102 mm of rain signals a properly wet month, with only about 15 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 7/10 on the same scale — 5th of 12 months, versus 9.2/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, March is materially better in Sumidero Canyon — 2.2 points higher on the same scale.
