Laos weather in September
Laos in September averages 28°C (82°F), 178 mm of rain and 5.3 hours of sun a day. It is one of the wetter months of the year here.
Of the twelve months in Laos, September is the fourth wettest and the fifth dullest.
- Average temp
- 28°C (82°F)
23–33°C · 74–91°F
- Rainfall
- 178 mm
A wet month
- Sunshine
- 5.3 h
hours per day
What is Laos like in September?
Daytime
Days are hot, often above 32°C.
Rain
Expect frequent rain — this is a wet month.
Evening
Evenings stay warm.
What should I pack for Laos in September?
High-factor sun cream
With daytime highs around 33°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A proper waterproof, not a folding umbrella
178 mm in the month usually arrives as heavy bursts that an umbrella will not cover.
A dry bag for phone and documents
Worth it for one downpour caught between the taxi and the door.
September compared with August and October
September in Laos is about the same temperature as August and 133 mm drier than it, which averages 28°C (82°F).
September in Laos is 1.2°C warmer than October and 88 mm wetter than it, which averages 27°C (80°F).
Daylight in Laos in September
On 15 September the sun is up for 12 hours 15 minutes in Laos, rising about 05:57 and setting about 18:12 local time.
September ends 33 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 5 minutes short of June, the longest-lit month here.
Travel guides for Laos
What to read before you book.
Laos weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 22°C / 71°F | 14 mm |
| February | 24°C / 76°F | 19 mm |
| March | 26°C / 80°F | 49 mm |
| April | 29°C / 84°F | 93 mm |
| May | 29°C / 85°F | 165 mm |
| June | 29°C / 85°F | 219 mm |
| July | 28°C / 83°F | 250 mm |
| August | 28°C / 82°F | 311 mm |
| September | 28°C / 82°F | 178 mm |
| October | 27°C / 80°F | 90 mm |
| November | 24°C / 76°F | 24 mm |
| December | 22°C / 71°F | 20 mm |
Check another month
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FAQs about Laos in September
September climate averages for Laos, 1991–2020.
Laos averages 28°C (82°F) in September, ranging from about 23°C (74°F) at night to 33°C (91°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Yes, a lot. September brings about 178 mm, which makes it one of the wetter months here — expect heavy bursts rather than all-day drizzle.
Yes. September averages 28°C (82°F) against 27°C (80°F) in October — 1.2°C warmer.
September is about as warm as August, and 133 mm drier.
It is outside the easiest window. The most comfortable stretch here is October to March; September sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
About 5.3 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 15 minutes of daylight in mid-September, against 13 hours 20 minutes in June and 10 hours 56 minutes in December.
On 15 September, sunrise is about 05:57 and sunset about 18:12 local time. Both shift across the month — the month ends 33 minutes shorter than it starts.
