January in Vientiane tops the year's climate scores
Best window · 9.6/10January averages 23°C (73°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 17 mm of rain — occasional showers rather than washed-out days — alongside about 29 days with 6+ hours of sunshine and 11.2 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Vientiane at 9.6/10 — the reference point every other month on this page is measured against.
Figure on peak pricing, with 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.
February ranks 3rd of 12 for Vientiane — one of the best windows
Best window · 9/10February averages 24°C (76°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 22 mm of rain — occasional showers rather than washed-out days — alongside about 26 days with 6+ hours of sunshine and 11.6 daylight hours.
A 9/10 puts this among the year's best months in Vientiane (3rd of 12); only January scores higher, at 9.6/10.
Figure on 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.
March holds up well in Vientiane — 5th best month
Good · 7.1/10Days in March average 27°C (81°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 57 mm of rain this month — a flexible day or two helps — with about 29 days with 6+ hours of sunshine and 12 hours of daylight to work around it.
That is 7.1/10 on the same scale — 5th of 12 months, versus 9.6/10 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.
If your dates are flexible, January is materially better in Vientiane — 2.5 points higher on the same scale.
April in Vientiane — middling scores, decent value
Trade-offs · 6.5/10April averages 30°C (86°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 51 mm, so plan one flexible day in three; you still get about 30 days with 6+ hours of sunshine and 12.6 hours of daylight.
It scores 6.5/10 here, 6th of 12 months, against 9.6/10 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 packable rain layer.
Flexible dates? January scores 3.1 points higher here — enough to change the trip.
May in Vientiane — off-season conditions
Hardest · 3/10Days in May average 29°C (83°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 282 mm, but with about 25 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 3/10 on the same scale — 12th of 12 months, versus 9.6/10 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.
If your dates are flexible, January is materially better in Vientiane — 6.6 points higher on the same scale.
June in Vientiane: expect compromises
Hardest · 3.1/10June averages 28°C (82°F) and humidity near 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
355 mm makes this the wettest stretch of the year, though about 24 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 3.1/10 here, 8th of 12 months, against 9.6/10 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.
Flexible dates? January scores 6.5 points higher here — enough to change the trip.
July in Vientiane: expect compromises
Hardest · 3.1/10July averages 27°C (81°F) and humidity near 86%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
416 mm makes this the wettest stretch of the year, though about 25 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 3.1/10 here, 9th of 12 months, against 9.6/10 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.
Flexible dates? January scores 6.5 points higher here — enough to change the trip.
August in Vientiane — the hardest end of the year
Hardest · 3.1/10Days in August average 27°C (80°F) and humidity near 87% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 403 mm: only about 19 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.1/10 on the same scale — 10th of 12 months, versus 9.6/10 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.
If your dates are flexible, January is materially better in Vientiane — 6.5 points higher on the same scale.
September in Vientiane — the hardest end of the year
Hardest · 3.1/10Days in September average 27°C (80°F) and humidity near 87% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 468 mm: only about 19 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.1/10 on the same scale — 11th of 12 months, versus 9.6/10 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.
If your dates are flexible, January is materially better in Vientiane — 6.5 points higher on the same scale.
October in Vientiane — the hardest end of the year
Hardest · 4.4/10October averages 26°C (80°F) and humidity near 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 150 mm — wet for this destination — but about 29 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 4.4/10 here, 7th of 12 months, against 9.6/10 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.
Flexible dates? January scores 5.2 points higher here — enough to change the trip.
November in Vientiane: strong conditions, 4th of 12
Good · 8.2/10November averages 26°C (78°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 36 mm of rain — occasional showers rather than washed-out days — alongside about 30 days with 6+ hours of sunshine and 11.3 daylight hours.
It scores 8.2/10 here, 4th of 12 months, against 9.6/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection.
December in Vientiane — one of the year's strongest windows (2nd)
Best window · 9.6/10At 23°C (73°F) this is comfortable city weather in December, with sightseeing easiest before lunch and after the afternoon peak.
At just 0 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 11.1 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Vientiane at 9.6/10 (2nd of 12), just behind January at 9.6/10.
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.
