January in Arenal Volcano — reliably good (2nd best month)
Good · 7.8/10January averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 9 mm for the month, with about 16 sunny days and 11.5 hours of daylight to work with.
It scores 7.8/10 here, 2nd of 12 months, against 8/10 in the destination's best month.
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, swimwear and real sun protection, footwear you can get muddy.
February in Arenal Volcano — the year's strongest window
Best window · 8/10February averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 15 mm for the month, with about 19 sunny days and 11.7 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Arenal Volcano at 8/10 — 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, swimwear and real sun protection, footwear you can get muddy.
March in Arenal Volcano — workable with trade-offs
Trade-offs · 6.5/10March averages 26°C (80°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 81 mm, so plan one flexible day in three; you still get about 23 sunny days and 11.9 hours of daylight.
It scores 6.5/10 here, 4th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 1.5 points higher on the same scale.
April in Arenal Volcano — workable with trade-offs
Trade-offs · 6.2/10April averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 77 mm, so plan one flexible day in three; you still get about 21 sunny days and 12.2 hours of daylight.
It scores 6.2/10 here, 5th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 1.8 points higher on the same scale.
May in Arenal Volcano — the hardest end of the year
Hardest · 4/10May averages 27°C (81°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
449 mm of rain puts this in monsoon territory — about 19 sunny days across the whole month, and multi-day washouts are normal.
It scores 4/10 here, 9th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 4 points higher on the same scale.
June in Arenal Volcano — the hardest end of the year
Hardest · 4.2/10June averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
346 mm of rain puts this in monsoon territory — about 16 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.2/10 here, 7th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 3.8 points higher on the same scale.
July in Arenal Volcano — the hardest end of the year
Hardest · 4/10July averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
209 mm of rain puts this in monsoon territory — about 12 sunny days across the whole month, and multi-day washouts are normal.
It scores 4/10 here, 10th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 4 points higher on the same scale.
August in Arenal Volcano — the hardest end of the year
Hardest · 4.8/10August averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 143 mm this is a genuinely wet month: about 15 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.8/10 here, 6th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 3.2 points higher on the same scale.
September in Arenal Volcano — the hardest end of the year
Hardest · 4.1/10September averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
254 mm of rain puts this in monsoon territory — about 16 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.1/10 here, 8th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 3.9 points higher on the same scale.
October in Arenal Volcano — the hardest end of the year
Hardest · 4/10October averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
272 mm of rain puts this in monsoon territory — about 15 sunny days across the whole month, and multi-day washouts are normal.
It scores 4/10 here, 11th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 4 points higher on the same scale.
November in Arenal Volcano — the hardest end of the year
Hardest · 3.6/10November averages 24°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
415 mm of rain puts this in monsoon territory — about 9 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.6/10 here, 12th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, February is materially better in Arenal Volcano — 4.4 points higher on the same scale.
December in Arenal Volcano — workable with trade-offs
Trade-offs · 6.7/10December averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 50 mm, so plan one flexible day in three; you still get about 12 sunny days and 11.4 hours of daylight.
It scores 6.7/10 here, 3rd of 12 months, against 8/10 in the destination's best month.
Expect peak pricing, and 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, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.
