January in Isalo National Park — workable with trade-offs
Trade-offs · 6.3/10January averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
213 mm of rain puts this in monsoon territory — about 31 sunny days across the whole month, and multi-day washouts are normal.
It scores 6.3/10 here, 11th of 12 months, against 9.7/10 in the destination's best month.
Expect mid-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, August is materially better in Isalo National Park — 3.4 points higher on the same scale.
February in Isalo National Park — workable with trade-offs
Trade-offs · 6.9/10February averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 130 mm this is a genuinely wet month: about 28 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.9/10 here, 9th of 12 months, against 9.7/10 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, August is materially better in Isalo National Park — 2.8 points higher on the same scale.
March in Isalo National Park — workable with trade-offs
Trade-offs · 6.8/10March averages 24°C (74°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 192 mm this is a genuinely wet month: about 28 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.8/10 here, 10th of 12 months, against 9.7/10 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, August is materially better in Isalo National Park — 2.9 points higher on the same scale.
April in Isalo National Park — the year's strongest window
Best window · 9.1/10April averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 37 mm of rain — occasional showers rather than washed-out days — alongside about 25 sunny days and 11.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 9.1/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
May in Isalo National Park — the year's strongest window
Best window · 9.3/10May averages 20°C (68°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 11 mm for the month, with about 21 sunny days and 10.9 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 9.3/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
June in Isalo National Park — the year's strongest window
Best window · 8.9/10June averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rain is a non-issue at 5 mm for the month, with about 17 sunny days and 10.6 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 8.9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, footwear you can get muddy.
July in Isalo National Park — the year's strongest window
Best window · 9.3/10July averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rain is a non-issue at 3 mm for the month, with about 19 sunny days and 10.8 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 9.3/10 — 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 layers you can shed by midday plus one warm layer for the evening, footwear you can get muddy.
August in Isalo National Park — the year's strongest window
Best window · 9.7/10August averages 20°C (68°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 25 sunny days and 11.2 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 9.7/10 — 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.
September in Isalo National Park — the year's strongest window
Best window · 9/10September averages 24°C (74°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 1 mm for the month, with about 30 sunny days and 11.9 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Isalo National Park at 9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
October in Isalo National Park — reliably good (7th best month)
Good · 8.1/10October averages 26°C (78°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 13 mm for the month, with about 31 sunny days and 12.5 hours of daylight to work with.
It scores 8.1/10 here, 7th of 12 months, against 9.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
If your dates are flexible, August is materially better in Isalo National Park — 1.6 points higher on the same scale.
November in Isalo National Park — reliably good (8th best month)
Good · 7/10November averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 56 mm, so plan one flexible day in three; you still get about 30 sunny days and 13.1 hours of daylight.
It scores 7/10 here, 8th of 12 months, against 9.7/10 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 packable rain layer, footwear you can get muddy.
If your dates are flexible, August is materially better in Isalo National Park — 2.7 points higher on the same scale.
December in Isalo National Park — workable with trade-offs
Trade-offs · 6.2/10December averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 113 mm this is a genuinely wet month: about 31 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.2/10 here, 12th of 12 months, against 9.7/10 in the destination's best month.
Expect mid-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, August is materially better in Isalo National Park — 3.5 points higher on the same scale.
