# Montevideo in August: weather

Montevideo, Uruguay (South America). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/montevideo/august

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 15.4 °C |
| Night (mean daily min) | 9.5 °C |
| Sea (surface) | 12.3 °C |
| Rainy days (≥ 1 mm) | 8 / month |
| Relative humidity | 78 % |
| Probability of a 25 °C+ afternoon | 1 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 26.5 °C | 19.9 °C | 24 °C | 9 |
| February | 26 °C | 19.8 °C | 24.3 °C | 9 |
| March | 24.3 °C | 18.3 °C | 22.7 °C | 10 |
| April | 21.4 °C | 15.9 °C | 20.1 °C | 9 |
| May | 17.3 °C | 12.3 °C | 16.2 °C | 7 |
| June | 14.8 °C | 9.8 °C | 12.9 °C | 8 |
| July | 13.8 °C | 8.8 °C | 11.4 °C | 9 |
| August | 15.4 °C | 9.5 °C | 12.3 °C | 8 |
| September | 16.5 °C | 10.9 °C | 14.3 °C | 7 |
| October | 18.7 °C | 12.8 °C | 16.9 °C | 10 |
| November | 22.2 °C | 15.7 °C | 19.8 °C | 7 |
| December | 24.7 °C | 18 °C | 22.3 °C | 8 |

Best months : January, February, December.

## Before you go

- **Safety** : No specific restrictions. Usual precautions apply. (official advice updated 10 December 2025 — https://www.gov.uk/foreign-travel-advice/uruguay)
- **Entry** (British passport) : No visa needed for stays of up to 90 days. Passport valid until your return date. Passport needs at least one blank page for the entry stamp; fresh food, dairy and animal products cannot be imported. (per the UK Foreign Office, 10 December 2025)
- **Vaccines** : hepatitis A and hepatitis B if you are not already vaccinated. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : None.
  (per the CDC, page reviewed 3 September 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/uruguay)

## 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.