Climate Overview
The climate in Heroica Guaymas is warm and mild. The average annual temperature is 25°C and approximately 129mm of precipitation falls per year. September is the wettest month, receiving around 53mm of rainfall. Heroica Guaymas is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 12°C.
Temperature
Temperatures in Heroica Guaymas vary considerably across the year, with a 23°C difference between the coldest and warmest months. August is the hottest month, with daytime highs reaching 35°C and an average of 32°C. January is the coolest month, with minimum temperatures around 12°C and an average of 17°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.
Precipitation
Heroica Guaymas is a quite dry location, receiving approximately 129mm of precipitation annually, which averages out to around 11mm per month. The wettest month is September, averaging 53mm of rainfall. August and October also tend to see above-average precipitation. The driest month is May, with just 0mm. That's 53mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Heroica Guaymas is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
7 days until Autumn
It is currently summer in Heroica Guaymas, which began on June 21, 2026. Heroica Guaymas is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 35°C, while the coldest stretch bottoms out in January near 12°C. Autumn is next, beginning on September 23, 2026 (7 days from now).
Spring
Temperatures range from 15 to 31°C. Precipitation is minimal, with only around 8mm for the entire season. Winds are generally light, averaging 13km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 26 to 35°C. Precipitation is minimal, with only around 30mm for the entire season. Winds are generally light, averaging 14km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.
Autumn
Temperatures range from 17 to 34°C. Rainfall is relatively light, with around 72mm over the season and a monthly average of 24mm. Winds are generally light, averaging 12km/h. Layered clothing works best as temperatures gradually cool. Enjoy the crisp air and changing scenery.
Winter
Temperatures range from 12 to 24°C. Precipitation is minimal, with only around 19mm for the entire season. Winds are generally light, averaging 13km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Heroica Guaymas is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 5mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 35°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Heroica Guaymas based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
