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Bayamón Weather by Month
Average temperatures, rainfall and humidity for Bayamón, Puerto Rico, month by month, built from OpenWeather’s historical records. Use it to see what a typical Bayamón month looks like before you travel — then check the live Bayamón forecast for the days ahead.
Warmest month
September
32°C average high
Coolest month
January
22°C average low
Wettest month
September
112 mm of rain
Driest month
June
59 mm of rain
Average temperature and rainfall in Bayamón 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 | 28°C | 22°C | 17°C / 31°C | 86 mm | 80% | 14 km/h |
| February | 28°C | 22°C | 19°C / 31°C | 83 mm | 79% | 16 km/h |
| March | 28°C | 22°C | 20°C / 37°C | 83 mm | 76% | 16 km/h |
| April | 29°C | 23°C | 20°C / 33°C | 88 mm | 77% | 16 km/h |
| May | 30°C | 24°C | 20°C / 34°C | 92 mm | 80% | 15 km/h |
| June | 31°C | 25°C | 22°C / 35°C | 59 mm | 79% | 17 km/h |
| July | 31°C | 25°C | 23°C / 34°C | 80 mm | 81% | 17 km/h |
| August | 31°C | 26°C | 23°C / 35°C | 90 mm | 81% | 16 km/h |
| September | 32°C | 25°C | 23°C / 35°C | 112 mm | 81% | 13 km/h |
| October | 31°C | 25°C | 21°C / 34°C | 103 mm | 81% | 12 km/h |
| November | 30°C | 24°C | 21°C / 33°C | 100 mm | 82% | 12 km/h |
| December | 29°C | 23°C | 18°C / 34°C | 91 mm | 80% | 13 km/h |
Best time to visit Bayamón
The most comfortable time to visit Bayamón is generally January to March, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around September, totalling about 1,067 mm a year.
Travellers who prefer heat should aim for September, when highs average 32°C. September is the month to avoid if rain would spoil your plans — it averages 112 mm, roughly 2× the rainfall of the driest month (June).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Bayamón forecast for what is happening now.