October Weather in Hermosillo, Mexico

Last updated: August 27, 2025

In Hermosillo, Mexico, the average temperature in October hovers around 27°C (81°F), making it a pleasant spot to visit. However, temperatures can vary significantly, with a minimum of 9°C (48°F) and soaring up to a maximum of 42°C (109°F). Expect a light touch of moisture too, as 17 mm (0.7 in) of precipitation falls over the course of just 1 day. With an average humidity of 73%, this climate ensures a warm and somewhat tropical atmosphere.

October Temperature in Hermosillo

In October in Hermosillo, the average temperature is 27°C (81°F). Maximums can reach 42°C (109°F) and minimums can be as low as 9°C (48°F). Be prepared for significant temperature variations and pack accordingly to make the most of your trip.

October Weather in Hermosillo: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Hermosillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hermosillo, October typically has an average temperature of 27°C (81°F), with highs reaching up to 42°C (109°F) and lows dropping to around 9°C (48°F).

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

October Precipitation in Hermosillo

In Hermosillo in October, the precipitation amount is 17 mm (0.7 in) over the course of 1 day.

October Precipitation Trends in Hermosillo

The chart displays monthly precipitation patterns in Hermosillo, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Hermosillo, October typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 1 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Hermosillo

In Hermosillo in October, humidity is 73%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, while also requiring frequent hydration breaks to stay comfortable during your travels.

October Average Humidity in Hermosillo

This chart illustrates the average monthly humidity levels in Hermosillo, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Hermosillo is approximately 73%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Hermosillo

In Hermosillo in October, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hermosillo.

Maximum UV Index Levels in Hermosillo for October

The chart shows the monthly maximum UV Index (UVI) for Hermosillo in October, 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 October, the maximum UV index in Hermosillo typically reaches 9, which falls under the very high exposure category.

Data source: Hermosillo October 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 October Weather in Hermosillo Compares to Other Months

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

This table compares monthly weather conditions in Hermosillo, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	17 mm (0.7 inches)	76%	moderate
February Weather	18°C (64°F)	14 mm (0.6 inches)	68%	very high
March Weather	20°C (69°F)	13 mm (0.5 inches)	56%	very high
April Weather	25°C (77°F)	0 mm (0.0 inches)	42%	extreme
May Weather	27°C (81°F)	0 mm (0.0 inches)	36%	extreme
June Weather	32°C (90°F)	5 mm (0.2 inches)	33%	extreme
July Weather	33°C (91°F)	51 mm (2.0 inches)	47%	extreme
August Weather	33°C (91°F)	42 mm (1.7 inches)	71%	extreme
September Weather	30°C (87°F)	47 mm (1.9 inches)	80%	extreme
October Weather	27°C (81°F)	17 mm (0.7 inches)	73%	very high
November Weather	22°C (72°F)	15 mm (0.6 inches)	75%	high
December Weather	17°C (62°F)	12 mm (0.5 inches)	81%	moderate