Montevideo in September
In September, Montevideo averages 17°C (62°F) during the day and 11°C (51°F) at night, with around 12 days of rain (77 mm total).
ShoulderConditions are cool — bring a jacket for evenings. Plan for unsettled weather and bring rain gear.
September in Montevideo is outside the typical sweet spot for sightseeing weather. It can still be a great time to visit if you have specific reasons (festivals, off-season pricing, etc.).
How September compares to the rest of the year in Montevideo
September is in the middle of the year for warmth in Montevideo (9th of 12) and one of the driest months (11th of 12). Daytime temperature runs 4°C below the annual average (20°C). September runs 1°C warmer than August (16°C) and warms a further 2°C into October (19°C).
September sunrise & sunset in Montevideo
Times shown for Montevideo local time (America/Montevideo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Montevideo — September
Golden-hour and blue-hour windows for the 15th of September, in Montevideo's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Montevideo in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Montevideo's popularity.
Crowds & pricing — September in Montevideo
Montevideo is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Montevideo
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Montevideo — September
Across the year Montevideo's sea swings from 11.1°C (July) to 24.7°C (January) — September sits at 14°C.
Montevideo in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 27°C / 80°F | 20°C / 68°F | 84 mm | 14 | — |
| February | 26°C / 79°F | 20°C / 67°F | 99 mm | 15 | — |
| March | 24°C / 75°F | 18°C / 64°F | 83 mm | 16 | — |
| April | 21°C / 70°F | 16°C / 60°F | 103 mm | 14 | — |
| May | 17°C / 63°F | 12°C / 54°F | 83 mm | 14 | — |
| June | 15°C / 58°F | 9°C / 49°F | 66 mm | 13 | — |
| July | 14°C / 57°F | 9°C / 48°F | 110 mm | 14 | — |
| August | 16°C / 60°F | 10°C / 49°F | 91 mm | 12 | — |
| September | 17°C / 62°F | 11°C / 51°F | 77 mm | 12 | — |
| October | 19°C / 66°F | 13°C / 55°F | 90 mm | 15 | — |
| November | 22°C / 72°F | 16°C / 60°F | 76 mm | 12 | — |
| December | 25°C / 77°F | 18°C / 65°F | 70 mm | 13 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Montevideo in September →
Frequently asked questions
How hot is Montevideo in September?
In September, Montevideo averages a high of 17°C (62°F) and a low of 11°C (51°F) — generally mild and pleasant.
Does it rain a lot in Montevideo in September?
September can be fairly wet in Montevideo, with about 12 rainy days on average.
Is September a good time to visit Montevideo?
September is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Montevideo in September?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full September packing list for Montevideo for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.