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Heroica Guaymas Weather by Month
Average temperatures, rainfall and humidity for Heroica Guaymas, Mexico, month by month, built from OpenWeather's historical records. Use it to see what a typical Heroica Guaymas month looks like before you travel — then check the live Heroica Guaymas forecast for the days ahead.
Warmest month
August
36°C average high
Coolest month
January
10°C average low
Wettest month
September
21 mm of rain
Driest month
May
0 mm of rain
Average temperature and rainfall in Heroica Guaymas by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 24°C | 10°C | -1°C / 32°C | 4 mm | 58% | 11 km/h |
| February | 25°C | 11°C | 0°C / 38°C | 5 mm | 54% | 11 km/h |
| March | 27°C | 13°C | 4°C / 37°C | 3 mm | 49% | 11 km/h |
| April | 30°C | 15°C | 6°C / 39°C | 4 mm | 46% | 12 km/h |
| May | 31°C | 18°C | 7°C / 41°C | 0 mm | 52% | 12 km/h |
| June | 35°C | 23°C | 13°C / 44°C | 2 mm | 59% | 13 km/h |
| July | 36°C | 26°C | 21°C / 44°C | 10 mm | 66% | 13 km/h |
| August | 36°C | 26°C | 20°C / 42°C | 12 mm | 70% | 13 km/h |
| September | 35°C | 24°C | 13°C / 43°C | 21 mm | 71% | 12 km/h |
| October | 33°C | 20°C | 10°C / 40°C | 6 mm | 61% | 11 km/h |
| November | 28°C | 15°C | 4°C / 38°C | 3 mm | 57% | 11 km/h |
| December | 25°C | 11°C | -1°C / 33°C | 3 mm | 58% | 11 km/h |
Best time to visit Heroica Guaymas
The most comfortable time to visit Heroica Guaymas is generally December to February, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rainfall is spread evenly across the months, totalling about 74 mm a year.
Travellers who prefer heat should aim for August, when highs average 36°C. September is the month to avoid if rain would spoil your plans — it averages 21 mm, roughly 21× the rainfall of May.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Heroica Guaymas forecast for what is happening now.