The climate in Zacatecas during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Zacatecas and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (74°F), whilst at night 11°C (51°F) is normal.
| Daytime temperature | 23.4°C 74.1°F | 
|---|---|
| Nightly temperature | 10.6°C 51.1°F | 
| Average temperature | 17°C 62.6°F | 
| Daily sunshine | 6.8 hrs | 
| Avg rainfall | 78 mm 3.1 ins | 
| Rainy days | 9 days | 
| Sea temperature | 29.6°C 85.3°F | 
| Humidity | 65% | 
| Windspeed | 13kph 8 mph | 
On average September is the 2nd wettest month of the year in Zacatecas with around 78mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
				
						
						The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Zacatecas in September 2025.
Best places to visit in September
| Hottest month: | May | 26.6°C 79.9°F | 
|---|---|---|
| Driest month: | February | 6mm 0.2ins | 
| Sunniest month: | February | 8.9hrs | 
| Coldest month: | January | 19.2°C 66.6°F | 
| Wettest month: | August | 99mm 3.9ins |