- Climate Type
- Subtropical (humid subtropical, Köppen Cfa)
Updated July 2026 · Sources cited: climatestotravel.com, weather-and-climate.com
Good to know
Good to Know
- Rainfall occurs consistently throughout the year—even 'dry' months receive ~70 mm. Plan indoor activities regardless of season.
- January and December (peak summer) attract Brazilian and Argentine tourists; book accommodations early if planning these months.
- Winter (June–August) offers lower prices and fewer crowds but is cooler and windier; suit preferences for urban exploration over beach activities.
- Spring (September–November) and autumn (March–May) offer mild temps and smaller crowds but expect more frequent rain.
- Sea breezes moderate summer heat compared to inland areas, though humidity remains high.
- South wind ('Pampero') can bring rapid weather shifts, interrupting hot periods with cool spells lasting a few days.
Seasons
Autumn
- Months
- March–May
- Description
- Mild with increasing rainfall, particularly March–April.
Spring
- Months
- September–November
- Description
- Refreshing with mild temperatures and increased rainfall, especially October.
Summer
- Months
- December–February
- Description
- Warm and humid with occasional heat waves; sea breeze moderates intensity.
Winter
- Months
- June–August
- Description
- Mild to cool with occasional cold waves; fog can form.
Rainfall
- Distribution
- Well distributed year-round with slight increases in autumn and spring.
- Annual Total Mm
- 1163
- Annual Total Inches
- 46
Driest Months
- Dry Mm
- 74
- Dry Month
- January
- Dry Inches
- 2.9
Wettest Months
- Peak Mm
- 117
- Peak Month
- October
- Peak Inches
- 4.6
Snowfall
Almost never occurs; last documented snowfall on July 13, 1930.
Temperature
- Extreme Cold Note
- Winter cold waves can drop to freezing or below at night; record low is −5°C (23°F).
- Extreme Heat Note
- Heat waves from December to March can reach or exceed 35°C (95°F); interior records reach 38–40°C (100–104°F).
Peak Season
- Month
- January
- Avg Low Celsius
- 19
- Avg High Celsius
- 27
- Avg Low Fahrenheit
- 66
- Avg High Fahrenheit
- 81
Off Peak Season
- Month
- July
- Avg Low Celsius
- 8
- Avg High Celsius
- 15
- Avg Low Fahrenheit
- 46
- Avg High Fahrenheit
- 59
Climate Type
Subtropical (humid subtropical, Köppen Cfa)
Sea Temperature
- Coolest Month
- July
- Warmest Month
- January
- Coolest Celsius
- 11
- Warmest Celsius
- 24
- Coolest Fahrenheit
- 52
- Warmest Fahrenheit
- 75
- Note
- Generally cool for swimming; acceptable January–March.
Best Months To Visit
Best Months To Visit
- January
- February
- December
Worst Months To Visit
Worst Months To Visit
- August
Alternative Good Months
Alternative Good Months
- October
- April
- March
- November
AI-generated estimateData refreshed July 2026
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Montevideo
Data last updated July 2026 · Verify anything important.