# Vientiane in March: weather

Vientiane, Laos (Southeast Asia). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/vientiane/march

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 32.5 °C |
| Night (mean daily min) | 22.6 °C |
| Rainy days (≥ 1 mm) | 8 / month |
| Relative humidity | 66 % |
| Probability of a 25 °C+ afternoon | 99 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 27.5 °C | 17.8 °C | – | 2 |
| February | 29.2 °C | 18.9 °C | – | 2 |
| March | 32.5 °C | 22.6 °C | – | 8 |
| April | 34.3 °C | 24.7 °C | – | 8 |
| May | 32.9 °C | 25.3 °C | – | 22 |
| June | 31.3 °C | 25.1 °C | – | 25 |
| July | 30.6 °C | 24.8 °C | – | 26 |
| August | 30.2 °C | 24.5 °C | – | 26 |
| September | 30.1 °C | 24.2 °C | – | 26 |
| October | 29.9 °C | 23.1 °C | – | 14 |
| November | 29.7 °C | 21.4 °C | – | 3 |
| December | 27.4 °C | 18.2 °C | – | 2 |

Best months : November, February, December.

## Before you go

- **Safety** : Outside the areas advised against. Parts of the country are advised against (Xaisomboun province); Vientiane is not one of them. (official advice updated 13 August 2026 — https://www.gov.uk/foreign-travel-advice/laos)
- **Entry** (British passport) : Visa issued on arrival for stays of up to 30 days. Passport valid for at least 6 months. Complete the Lao Digital Immigration Form (LDIF) within 3 days before arrival and departure; e-visa (apply 5 days ahead) or visa on arrival; 2 blank pages. (per the UK Foreign Office, 13 August 2026)
- **Vaccines** : typhoid recommended for most travellers; hepatitis A and hepatitis B if you are not already vaccinated; rabies, Japanese encephalitis and polio depending on activities and areas visited. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : Present. Areas: Present in the southern part of the country in the provinces of Attapeu, Champasak, Khammouane, Salavan, Savannakhet, and Sekong Rare cases in the northern part of the country None in the cities of Luang Prabang and Vientiane (the capital). Preventive medication recommended: In the provinces of Attapeu, Champasak, Khammouane, Salavan, Savannakhet, and Sekong: Atovaquone-proguanil, doxycycline, tafenoquine Northern part of the country: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only) — prescribed before departure.
- **Mosquitoes** : dengue and Zika reported: protect yourself from bites.
  (per the CDC, page reviewed 25 August 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/laos)

## Sources

Air, rain, humidity: ERA5-Land reanalysis (Copernicus) served by Open-Meteo (CC BY 4.0). Sea: NOAA OISST. Safety: FCDO (OGL v3), zones reviewed by Beau Fixe. Entry: France Diplomatie (Licence Ouverte 2.0) / FCDO. Health: CDC (public domain). Details: https://beaufixe.net/en/legal#sources

Beau Fixe — https://beaufixe.net — not a forecast; only the authorities are authoritative for safety, entry rules and health.