Climate averages 1991–2020
Bayamón weather
in July.
A hot, moderately wet month: the 2nd warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Bayamón: daytime highs average 31.5°C and nights cool to about 24.6°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 66 mm of rain on roughly 15 days, which makes July a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 07 min on an average July day.
The nearest other city in this atlas is San Juan (9 km away). In July its highs average 31.5°C, about as warm as Bayamón, with 80 mm of rain.
Among the 7 cities listed in Puerto Rico, Bayamón ranks joint 2nd of 7 for the warmest July highs and 3rd of 7 for the driest July (rainfall, lowest first). The mean July high of those 7 cities is 31.1°C; Bayamón is 0.4°C warmer than that mean.
From July to August, average highs rise by 0.1°C to 31.6°C, and monthly rainfall rises from 66 mm to 79 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bayamón climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.9°C21.5°C | 21.5°C | 38 | 9.9 | 11.211 h |
| February | 28.5°C21.4°C | 21.4°C | 28 | 7.7 | 11.512 h |
| March | 29.3°C21.5°C | 21.5°C | 40 | 8.2 | 12.012 h |
| April | 29.9°C22.4°C | 22.4°C | 70 | 10.7 | 12.513 h |
| May | 30.4°C23.5°C | 23.5°C | 106 | 15.6 | 13.013 h |
| June | 31.3°C24.4°C | 24.4°C | 60 | 12.8 | 13.213 h |
| July, selected | 31.5°C24.6°C | 24.6°C | 66 | 15.3 | 13.113 h |
| August | 31.6°C24.8°C | 24.8°C | 79 | 17.4 | 12.713 h |
| September | 31.1°C24.6°C | 24.6°C | 122 | 20.2 | 12.312 h |
| October | 30.3°C24.1°C | 24.1°C | 113 | 19.8 | 11.712 h |
| November | 28.8°C23.2°C | 23.2°C | 102 | 17.4 | 11.311 h |
| December | 28.1°C22.2°C | 22.2°C | 45 | 12.0 | 11.011 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- San Juan in JulyPuerto Rico · 9 kmHigh 31.5°C · Low 24.6°C · 80 mm rain
- Carolina in JulyPuerto Rico · 21 kmHigh 31.0°C · Low 24.7°C · 80 mm rain
- Caguas in JulyPuerto Rico · 22 kmHigh 30.2°C · Low 24.6°C · 110 mm rain
- Arecibo in JulyPuerto Rico · 60 kmHigh 31.7°C · Low 24.6°C · 79 mm rain
- Ponce in JulyPuerto Rico · 66 kmHigh 30.6°C · Low 24.6°C · 55 mm rain
- Mayagüez in JulyPuerto Rico · 106 kmHigh 31.5°C · Low 25.7°C · 51 mm rain
- Punta Cana in JulyDominican Republic · 238 kmHigh 28.6°C · Low 26.0°C · 90 mm rain
- Salvaleón de Higüey in JulyDominican Republic · 270 kmHigh 30.2°C · Low 24.4°C · 72 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bayamón) is explained once on the Bayamón year overview and on the Sources, method and limits page.