Temperatures in September
It's warm in September in San Luis with an average temperature of 27°C. Temperatures this month range from a low of 27°C to a high of 28°C. At night, you can expect temperatures between 19°C and 20°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Luis in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in San Luis with hot temperatures, averaging around 28°C during the day and nights close to 20°C. Plenty of days with a chance of precipitation.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature stays the same at 28°C, with nights close to 20°C. The chance of precipitation is high during this period.
Temperatures vary between day and night, so it’s smart to wear layers.
End of September
By the end of September, the average daytime temperature in San Luis will be around 28°C, with nights close to 20°C. There’s a significant chance of many days with precipitation.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in September
In September, there is an average of 279 mm of precipitation, spread over 20 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance this month is 68% per day. Though that seems frequent, there are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for San Luis. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
San Luis in September |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 20°C | |
 High Temp |
28°C | 22°C | |
| Low Temp |
27°C | 17°C | |
 Total Precipitation |
279 mm | 44 mm | |
| Rainy Days |
20 days | 8 days | |
August
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit San Luis?
After some sun? Then September isn’t the best time to be in San Luis. The temperature is pleasant, but there’s too much chance of rain this month.
The hurricane season in San Luis runs from June to November.
Temperature records for San Luis in September
With 31°C, San Luis hit the highest temperature in the last 10 years in September 2015. The lowest daytime temperature in this month was 23°C in 2022. The extreme night temperatures ranged from a low of 10°C to a high of 23°C.
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Daily Temperature in September in San Luis
This chart shows the average daily temperatures, both day and night, for each day in September in San Luis, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in San Luis
The chart below shows the average daily precipitation in September for San Luis, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 20 days of rain in San Luis.
Daily UV Index in September in San Luis
This chart shows the average daily UV index in September in San Luis, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in San Luis Over the Years
This chart shows the average temperature in September in San Luis, measured in degrees Celsius, over the past years.
Total Precipitation in September in San Luis Over the Years
This chart shows the average precipitation in September in San Luis, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for San Luis
Click on a specific day in September for detailed info on the typical weather on that day in San Luis. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in San Luis
Have you been to San Luis in September?
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Average Weather in San Luis by Month
Click on a month below to see detailed weather info for San Luis. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
