Weathermondo.com
MexicoThe weather in September in San Diego de la Unión
It's warm in September in San Diego de la Unión with an average temperature of 26°C. Temperatures this month range from a low of 24°C to a high of 28°C. At night, you can expect temperatures between 13°C and 15°C.
Looking for great weather? September is a good time to be in San Diego de la Unión. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for San Diego de la Unión, Mexico. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2023, San Diego de la Unión reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 19°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 5°C to a highest value of 17°C.
Rainfall amount
In September, there is an average of 79 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the East.
Daily weather in September for San Diego de la Unión
Click on any day in September to get detailed info about the usual weather on that day in San Diego de la Unión. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| San Diego de la Unión | New York | |
|---|---|---|
| Average temperature | 26°C | 27°C |
| Max. temperature | 28°C | 31°C |
| Min. temperature | 13°C | -5°C |
| Total precipitation | 79 mm | 57 mm |
| Rainy days | 10 days | 9 days |
Start of September
The month of September starts in San Diego de la Unión with hot temps, averaging around 27°C during the day and nights around 15°C.
Mid September
By mid-September, daytime temps stay steady at around 27°C, with nights around 15°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in San Diego de la Unión is around 27°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
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.
Check out the climate of San Diego de la Unión for all months and discover the best travel time
Curious about the weather in other parts of Mexico? Check out the climate and weather for spots like Cancún, Mexico City, Playa del Carmen, or explore other destinations in Mexico.
Temperature charts
These charts show the average temperatures in September in San Diego de la Unión, Mexico. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in San Diego de la Unión
Temperature in September in San Diego de la Unión over the years
Precipitation charts
These charts show the average amount of precipitation in September in San Diego de la Unión, Mexico. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in San Diego de la Unión
Total precipitation in September in San Diego de la Unión over the years
Daily UV index in September in San Diego de la Unión
This chart shows the average daily UV index in September in San Diego de la Unión, 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.
Weather experiences in September in San Diego de la Unión
Have you been to San Diego de la Unión in September?
Share your weather experience in September in San Diego de la Unión.
Average weather in San Diego de la Unión by month
Click on a month below to see detailed weather info for San Diego de la Unión. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.