Montevideo in September usually sees fair weather conditions, with an average daily high temperature of +16°C and roughly 10 sunny days. However, you should prepare for about 9 rainy days with an average precipitation of 84 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+16°C
Avg. max. temperature
+1°C
Min.
+32°C
Max.
84 mm
Total precipitation
77%
Avg. humidity
4 m/s
Avg. wind
10 ☀️
Sunny Days
8 ⛅️
Cloudy
9 🌦
Rainy
Our opinion: Montevideo has OK weather in September.
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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 +16°C on average, with a range between a maximum of +23°C during the day and a minimum of +4°C at night.
The average maximum temperature goes down 42% by the end of the month, compared with the beginning of the month, from +21°C to +13°C.
Is Montevideo warm or cold in September?
Montevideo is typically mild in September.
Maximum temperatures go up compared to the previous month from +15°C to +16°C. The minimum temperature also goes up from +9°C to +10°C.
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:
Water temperature in Montevideo in September
Water in Montevideo in September is Cold. It varies from +11°C to +17°C, with an average of +14°C.This is almost similar to the air temperature, which averages +16°C.
In September, water temperatures are average relative to the rest of the year:
The warmest water temperatures in Montevideo are reached in January, when the average sea temperature rises to +25°C. The coldest water temperatures are in July, with an average of +11°C.
Can you swim in Montevideo in September?
We would not recommend swimming in Montevideo in September, the water is very cold (+14°C on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in Montevideo in September
Montevideo weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+15°C
+16°C
+19°C
Min. temperature
0°C
+1°C
+4°C
Max. temperature
+31°C
+32°C
+33°C
Rainfall
84 mm
84 mm
97 mm
Wind
4 m/s
4 m/s
4 m/s
Avg. water temperature
+12°C
+14°C
+18°C
Humidity
78%
77%
76%
Air pressure
1017 HPa
1017 HPa
1014 HPa
Sunny days
10
10
10
Cloudy days
9
8
8
Rainy days
9
9
9
Snowy days
0
0
0
September weather is still as ok as in August.It’s getting warmer as September arrives. The average maximum temperature goes up from +15°C to +16°C 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 77%.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 10 sunny days during the month.
October brings much the same weather, it remains ok.
Wind speed in Montevideo in September based on historical data.
Last Year
Historical Data
The average wind speed is 5 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 decreasing during September, going from 5 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
A chance of rain on a typical day in September stands at 37%, leading to total precipitation of around 86 mm. The maximum amount of rainfall per day is around 19 mm, which is considered light rain.September is a pretty wet month with over 11 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
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 35% chance of precipitation and 135 mm of rainfall per day. January, on the other hand, is the driest month with a mere 19% chance of precipitation and 64 mm of rainfall per day.
How was the weather last September in Montevideo?
This is the weather in Montevideo in September 2024:
1 September
☀️
+21°C
2 September
☁️
+17°C
3 September
☀️
+13°C
4 September
☁️
+14°C
5 September
☁️
+11°C
6 September
☀️
+14°C
7 September
🌧️
+16°C
8 September
☀️
+15°C
9 September
☀️
+19°C
10 September
☀️
+18°C
11 September
🌫️
+21°C
12 September
☀️
+14°C
13 September
☀️
+13°C
14 September
☀️
+15°C
15 September
☀️
+22°C
16 September
☀️
+23°C
17 September
☀️
+15°C
18 September
☁️
+14°C
19 September
☁️
+16°C
20 September
🌧️
+16°C
21 September
🌧️
+19°C
22 September
☁️
+15°C
23 September
☁️
+17°C
24 September
☁️
+14°C
25 September
☀️
+15°C
26 September
🌧️
+12°C
27 September
☀️
+16°C
28 September
☀️
+20°C
29 September
☀️
+18°C
30 September
☁️
+13°C
In September 2024 Montevideo had 16 sunny days, 9 cloudy days, and 4 rainy days. The average maximum temperature was +16°C, with an absolute maximum of +23°C and a minimum of +11°C. The average humidity was 81%, with a maximum of 100% and a minimum of 60%. The average wind speed was 5 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 Years
This is how Montevideo climate have been changing during last 43 years period.
The climate in Montevideo in September has not changed much over the last 43 years.
The average temperature was the lowest in 1984 (+18°C) and the highest in 2017 (+22°C). The driest year was 1979 with only 542 mm of rainfall, and the wettest year was 2019 with 3342 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!
Can you swim in Montevideo in September?
Swimming in Montevideo in September is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
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.
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, 2023.
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.
