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Montevideo in September: Weather, Average temperature and Climate

Take a look at past year’s weather for Montevideo in September and see if it is worth visiting.
Check flight prices to Montevideo on Avionero:
September

Weather in Montevideo in September 2024

OK Weather
Mild
☁️
Cloudy
If you plan to visit Montevideo in September, the weather is typically alright, with an average high temperature of +61°F during the day and approximately 11 sunny days. Expect some rainy, though, as there are typically 6 rainy days in the month and around 84 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+61°F
Avg. max. temperature
+34°F
Min.
+90°F
Max.
84 mm
Total precipitation
76%
Avg. humidity
4 m/s
Avg. wind
11 ☀️
Sunny Days
13 ⛅️
Cloudy
6 🌦
Rainy
Our opinion: Montevideo has OK weather in September.

Average temperature in Montevideo in September

Here are the expected maximum, average and minimum temperatures in Montevideo for September based on the historical data.
Last Year
Historical Data

The temperature in September is +61°F on average, with a range between a maximum of +72°F during the day and a minimum of +45°F at night.

The average maximum temperature goes up 7% by the end of the month, compared with the beginning of the month, from +59°F to +61°F.

Is Montevideo warm or cold in September?

Montevideo is typically mild in September.

Maximum temperatures go up compared to the previous month from +59°F to +61°F. The minimum temperature also goes up from +48°F to +50°F.

Pack a light jacket as it will be warm in the day and cool in the evenings.

Take a look at how September is compared to other months in Montevideo:

Climate in Montevideo in September

Montevideo weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+59°F+61°F+66°F
Min. temperature
+32°F+34°F+39°F
Max. temperature
+88°F+90°F+91°F
Rainfall
84 mm84 mm98 mm
Wind
4 m/s4 m/s4 m/s
Humidity
78%76%75%
Air pressure
1017 HPa1017 HPa1014 HPa
Sunny days
111111
Cloudy days
141314
Rainy days
666
Snowy days
000

September weather is still as ok as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +59°F to +61°F during the day. The rainfall amount in September stays the same as in the previous month with a 84 mm of total precipitation. It feels drier, as humidity decreases from 78% to 76%. The average wind speed doesn’t change much during September, staying around 4 m/s. The amount of sunny days stay about the same, averaging 11 sunny days during the month.

But maybe it is worth considering traveling in October as the weather gets better.

Wind

Wind speed in Montevideo in September based on historical data.
Last Year
Historical Data

The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Montevideo is gradually increasing during September, going from 2 m/s to 4 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Montevideo based on historical data.
Last Year
Historical Data
Typically, there is a 10% chance of rain on an average day in September, with total rainfall of approximately 15 mm. The maximum amount of rainfall per day is around 7 mm, which is considered light rain. Montevideo is amazing in September with as little as 3 rainy days on average, so plan adventures in the great outdoors.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Montevideo wettest month is May, where a typical day has a 19% chance of precipitation and 135 mm of rainfall per day. January, on the other hand, is the driest month with a mere 13% chance of precipitation and 65 mm of rainfall per day.

How was the weather last September in Montevideo?

This is the weather in Montevideo in September 2023:
1 September
☀️
+58°F
2 September
☁️
+55°F
3 September
☀️
+56°F
4 September
☀️
+63°F
5 September
☀️
+63°F
6 September
☀️
+65°F
7 September
☀️
+68°F
8 September
☀️
+68°F
9 September
🌧️
+56°F
10 September
☀️
+55°F
11 September
☀️
+58°F
12 September
☀️
+56°F
13 September
☁️
+58°F
14 September
☀️
+55°F
15 September
☀️
+58°F
16 September
☀️
+70°F
17 September
☀️
+71°F
18 September
☀️
+66°F
19 September
☀️
+67°F
20 September
☁️
+60°F
21 September
☀️
+55°F
22 September
☀️
+58°F
23 September
☀️
+60°F
24 September
☀️
+65°F
25 September
☀️
+61°F
26 September
☀️
+64°F
27 September
🌫️
+68°F
28 September
☀️
+56°F
29 September
☀️
+57°F
30 September
☀️
+61°F
In September 2023 Montevideo had 25 sunny days, 3 cloudy days, and 1 rainy days. The average maximum temperature was +61°F, with an absolute maximum of +72°F and a minimum of +55°F. The average humidity was 72%, with a maximum of 100% and a minimum of 29%. The average wind speed was 4 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Montevideo climate has changed over the last 43 years.

The climate in Montevideo in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1987 (+61°F) and the highest in 2018 (+69°F). The driest year was 2022 with only 18 mm of rainfall, and the wettest year was 2014 with 254 mm.

FAQ

Frequently asked questions about the weather in Montevideo in September:

Is September a good time to visit Montevideo?

It’s always a good time to visit Montevideo, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Montevideo in September?

September has mild temperatures in Montevideo. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!

Is Montevideo rainy in September?

Montevideo is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Montevideo in September?

The amount of sunny days in Montevideo during September varies; prepare for a mix of clouds and sun.

Monthly weather in Montevideo

Source of the data

For this page, we’ve looked at the typical weather in Montevideo, based on historical hourly weather data from January 1, 1979, to December 31, 2022.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.