January in Underground River — middling scores, decent value
Trade-offs · 5.5/10Days in January average 27°C (81°F) and humidity near 82% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 87 mm of rain this month — a flexible day or two helps — with about 19 days with 6+ hours of sunshine and 11.5 hours of daylight to work around it.
That is 5.5/10 on the same scale — 4th of 12 months, versus 6.8/10 for the best month here.
Budget for 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.
February in Underground River tops the year's climate scores
Best window · 6.8/10Days in February average 27°C (81°F) and humidity near 80% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 27 mm of rain, any showers tend to pass through rather than settle in; about 24 days with 6+ hours of sunshine and 11.7 hours of daylight fill the rest.
On our climate-comfort scale this is the top-ranked month of the year for Underground River at 6.8/10 — 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 the lightest breathable clothing you own, a hat, and more water than feels necessary, footwear you can get muddy.
March in Underground River — workable with trade-offs
Trade-offs · 6.4/10March averages 28°C (82°F) and humidity near 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 11.9 daylight hours.
It scores 6.4/10 here, 2nd of 12 months, against 6.8/10 in the destination's best month.
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 the lightest breathable clothing you own, a hat, and more water than feels necessary, footwear you can get muddy.
April in Underground River — workable with trade-offs
Trade-offs · 6.2/10Days in April average 29°C (84°F) and humidity near 74% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 58 mm of rain this month — a flexible day or two helps — with about 30 days with 6+ hours of sunshine and 12.2 hours of daylight to work around it.
That is 6.2/10 on the same scale — 3rd of 12 months, versus 6.8/10 for the best month here.
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.
May in Underground River: mixed conditions, plan around the weather
Trade-offs · 5.1/10May averages 30°C (85°F) and humidity near 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 128 mm — wet for this destination — but about 28 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 5.1/10 here, 5th of 12 months, against 6.8/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
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.
Flexible dates? February scores 1.7 points higher here — enough to change the trip.
June in Underground River — off-season conditions
Hardest · 4.1/10Days in June average 29°C (83°F) and humidity near 79% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 211 mm: only about 19 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 4.1/10 on the same scale — 8th of 12 months, versus 6.8/10 for the best month here.
Budget for 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 Underground River — 2.7 points higher on the same scale.
July in Underground River — off-season conditions
Hardest · 3.5/10Days in July average 28°C (83°F) and humidity near 82% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 309 mm: only about 16 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.5/10 on the same scale — 11th of 12 months, versus 6.8/10 for the best month here.
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 Underground River — 3.3 points higher on the same scale.
August in Underground River — off-season conditions
Hardest · 4.3/10August averages 28°C (83°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 191 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 4.3/10 here, 7th of 12 months, against 6.8/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
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.
Flexible dates? February scores 2.5 points higher here — enough to change the trip.
September in Underground River — the hardest end of the year
Hardest · 3.5/10September averages 28°C (83°F) and humidity near 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
276 mm of rain puts this in monsoon territory — about 17 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 3.5/10 here, 12th of 12 months, against 6.8/10 in the destination's best month.
Plan for low-season pricing, with 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.
Flexible dates? February scores 3.3 points higher here — enough to change the trip.
October in Underground River: expect compromises
Hardest · 3.8/10Days in October average 28°C (83°F) and humidity near 82% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 206 mm: only about 18 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.8/10 on the same scale — 9th of 12 months, versus 6.8/10 for the best month here.
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 Underground River — 3 points higher on the same scale.
November in Underground River: expect compromises
Hardest · 4.4/10Days in November average 28°C (83°F) and humidity near 82% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
134 mm of rain makes this a wet month here, though with about 20 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 4.4/10 on the same scale — 6th of 12 months, versus 6.8/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
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 Underground River — 2.4 points higher on the same scale.
December in Underground River: expect compromises
Hardest · 3.7/10December averages 28°C (82°F) and humidity near 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 159 mm this is a genuinely wet month: about 16 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 3.7/10 here, 10th of 12 months, against 6.8/10 in the destination's best month.
Figure on low-season pricing, with 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.
Flexible dates? February scores 3.1 points higher here — enough to change the trip.