January in Sun Moon Lake — reliably good (3rd best month)
Good · 7.9/10January averages 18°C (64°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 26 mm of rain — occasional showers rather than washed-out days — alongside about 10 sunny days and 10.7 daylight hours.
It scores 7.9/10 here, 3rd of 12 months, against 8.8/10 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 layers you can shed by midday plus one warm layer for the evening, footwear you can get muddy.
February in Sun Moon Lake — reliably good (2nd best month)
Good · 8/10February 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.
Rainfall runs 52 mm, so plan one flexible day in three; you still get about 12 sunny days and 11.2 hours of daylight.
It scores 8/10 here, 2nd of 12 months, against 8.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
March in Sun Moon Lake — the year's strongest window
Best window · 8.8/10March averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 57 mm, so plan one flexible day in three; you still get about 18 sunny days and 11.8 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Sun Moon Lake at 8.8/10 — 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, a packable rain layer, footwear you can get muddy.
April in Sun Moon Lake — reliably good (6th best month)
Good · 7.2/10April averages 24°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 96 mm, so plan one flexible day in three; you still get about 19 sunny days and 12.6 hours of daylight.
It scores 7.2/10 here, 6th of 12 months, against 8.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.
If your dates are flexible, March is materially better in Sun Moon Lake — 1.6 points higher on the same scale.
May in Sun Moon Lake — workable with trade-offs
Trade-offs · 5.5/10May averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 169 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.5/10 here, 9th of 12 months, against 8.8/10 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, March is materially better in Sun Moon Lake — 3.3 points higher on the same scale.
June in Sun Moon Lake — workable with trade-offs
Trade-offs · 5.6/10June averages 27°C (81°F) with humidity around 80%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 125 mm this is a genuinely wet month: about 22 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.6/10 here, 8th of 12 months, against 8.8/10 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, March is materially better in Sun Moon Lake — 3.2 points higher on the same scale.
July in Sun Moon Lake — workable with trade-offs
Trade-offs · 5.4/10July averages 29°C (84°F) with humidity around 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 122 mm this is a genuinely wet month: about 26 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.4/10 here, 10th of 12 months, against 8.8/10 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 proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, March is materially better in Sun Moon Lake — 3.4 points higher on the same scale.
August in Sun Moon Lake — workable with trade-offs
Trade-offs · 5.1/10August averages 28°C (82°F) with humidity around 80%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 136 mm this is a genuinely wet month: about 22 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.1/10 here, 11th of 12 months, against 8.8/10 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, March is materially better in Sun Moon Lake — 3.7 points higher on the same scale.
September in Sun Moon Lake — workable with trade-offs
Trade-offs · 5/10September averages 28°C (82°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 122 mm this is a genuinely wet month: about 20 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5/10 here, 12th of 12 months, against 8.8/10 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, March is materially better in Sun Moon Lake — 3.8 points higher on the same scale.
October in Sun Moon Lake — workable with trade-offs
Trade-offs · 5.7/10October averages 26°C (79°F) with humidity around 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 84 mm, so plan one flexible day in three; you still get about 15 sunny days and 11.4 hours of daylight.
It scores 5.7/10 here, 7th of 12 months, against 8.8/10 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 packable rain layer, footwear you can get muddy.
If your dates are flexible, March is materially better in Sun Moon Lake — 3.1 points higher on the same scale.
November in Sun Moon Lake — reliably good (5th best month)
Good · 7.4/10November averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 30 mm of rain — occasional showers rather than washed-out days — alongside about 12 sunny days and 10.8 daylight hours.
It scores 7.4/10 here, 5th of 12 months, against 8.8/10 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.
December in Sun Moon Lake — reliably good (4th best month)
Good · 7.8/10December averages 19°C (67°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 21 mm of rain — occasional showers rather than washed-out days — alongside about 8 sunny days and 10.5 daylight hours.
It scores 7.8/10 here, 4th of 12 months, against 8.8/10 in the destination's best month.
Expect peak pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
