September Weather in Janos, Mexico

Last updated: August 27, 2025

In Janos, Mexico, the average temperature in September hovers around 24°C (76°F). You can expect a minimum temperature of 12°C (53°F) and a maximum that can reach up to 36°C (97°F). During this month, the area receives an average precipitation of 29 mm (1.1 in) over approximately 6 days, accompanied by an average humidity level of 74%. Enjoy the warm climate while staying prepared for occasional showers!

September Temperature in Janos

In September in Janos, the average temperature is 24°C (76°F). Maximums can reach 36°C (97°F), and minimums can be as low as 12°C (53°F). This makes Janos an ideal destination for travelers seeking warm weather while still enjoying cooler evenings.

September Weather in Janos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Janos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Janos, September typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (53°F).

Data source: Temperature data for Janos generated using information from the Copernicus Climate Change Service.

September Precipitation in Janos

In Janos in September, the precipitation amount is 29 mm (1.1 in) over the course of 6 days.

September Precipitation Trends in Janos

The chart displays monthly precipitation patterns in Janos, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Janos, September typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Janos

In Janos in September, humidity is 74%. With an average temperature of 24°C (76°F), this humidity feels like a warm, heavy blanket wrapping around you, making travel a bit sticky and requiring plenty of hydration as you explore.

September Average Humidity in Janos

This chart illustrates the average monthly humidity levels in Janos, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Janos is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Janos

In Janos in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Janos.

Maximum UV Index Levels in Janos for September

The chart shows the monthly maximum UV Index (UVI) for Janos in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Janos typically reaches 11, which falls under the extreme exposure category.

Data source: Janos September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Janos Compares to Other Months

Weather in Janos varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Janos, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Janos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	17 mm (0.7 inches)	79%	moderate
February Weather	11°C (52°F)	13 mm (0.5 inches)	76%	very high
March Weather	15°C (60°F)	13 mm (0.5 inches)	66%	very high
April Weather	20°C (68°F)	3 mm (0.1 inches)	51%	extreme
May Weather	24°C (76°F)	6 mm (0.2 inches)	42%	extreme
June Weather	29°C (84°F)	9 mm (0.4 inches)	37%	extreme
July Weather	27°C (82°F)	51 mm (2.0 inches)	51%	extreme
August Weather	27°C (81°F)	34 mm (1.3 inches)	64%	extreme
September Weather	24°C (76°F)	29 mm (1.1 inches)	74%	extreme
October Weather	20°C (67°F)	14 mm (0.6 inches)	71%	very high
November Weather	14°C (58°F)	14 mm (0.5 inches)	78%	high
December Weather	9°C (48°F)	23 mm (0.9 inches)	85%	moderate