September weather forecastMontevideo, Uruguay
September
Weather in September
September, the dawn of Montevideo's spring exhibits warmer temperatures and extended sunshine hours. The sea temperature gradually increases to 13.3°C (55.9°F), inviting for enjoyable walks along the beaches. From a climatological perspective, a rise in rainfall to 94mm (3.7") can be seen. The gradually increasing daylight duration marks longer days, providing more time for outdoor explorations. A drop in humidity perfectly aligns with the comfortable weather spring offers.Temperature
A minimal variation is noted in Montevideo's average high-temperature at the onset of September, reaching a still refreshing 18°C (64.4°F) from August's 16.2°C (61.2°F). Montevideo reports a consistent average low-temperature of 9.1°C (48.4°F) throughout September nights.Humidity
In Montevideo, Uruguay, the average relative humidity in September is 74%.Rainfall
In September, the rain falls for 6 days. Throughout September, 94mm (3.7") of precipitation is accumulated. In Montevideo, Uruguay, during the entire year, the rain falls for 77 days and collects up to 1101mm (43.35") of precipitation.Sea temperature
In Montevideo, in September, the average water temperature is 13.3°C (55.9°F).Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.
Daylight
The average length of the day in September in Montevideo is 11h and 53min.On the first day of the month, sunrise is at 07:02 and sunset at 18:26. On the last day of September, in Montevideo, sunrise is at 06:21 and sunset at 18:47 -03.
Sunshine
In Montevideo, the average sunshine in September is 6.1h.UV index
In Montevideo, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Montevideo, Uruguay
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is January (28.4°C).
The month with the lowest average high temperature is July (15°C).
- Average low temperature in September: 9.1°C
The month with the highest average low temperature is January (18°C).
The coldest month (with the lowest average low temperature) is July (7.2°C).
Average humidity in September
Montevideo, Uruguay
- Average humidity in September: 74%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is December (67%).
Average rainfall in September
Montevideo, Uruguay
- Average rainfall in September: 93.9mm
The wettest month (with the highest rainfall) is October (108.5mm).
The driest month (with the least rainfall) is June (83.1mm).
Average rainfall days in September
Montevideo, Uruguay
- Average rainfall days in September: 6 days
The months with the highest number of rainy days are February, June, July, October and November (7 days).
The months with the least rainy days are January, March, April, May, August, September and December (6 days).
Average sea temperature in September
Montevideo, Uruguay
- Average sea temperature in September: 13.3°C
The best month for swimming (with the highest average sea temperature) is January (24.2°C).
The coldest month (with the lowest average sea temperature) is July (11.3°C).
Average daylight in September /
Average sunshine in September
Montevideo, Uruguay
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).
- Average sunshine in September: 6h and 6min
The month with the most sunshine is January (Average sunshine: 9h and 30min).
The month with the least sunshine is June (Average sunshine: 4h and 18min).
Average UV index in September
Montevideo, Uruguay
- Average UV index in September: 6
The months with the highest UV index are January and December (UV index 12).
The months with the lowest UV index are June and July (UV index 2).
