Average temperature in January is 23.4 °C
Average daytime temperature is 28.3 °C
Average night temperature is 19.8 °C
Absolute maximum temperature: 30.1 °C
Absolute minimum temperature: 17.9 °C
Number of sunny days: 4
Number of rainy days: 27
Number of snow days:
Precipitation sum: 71 mm
* Weather data for Guaynabo Puerto Rico is based on climate observations for 2023 year
| January (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 29.5 | 28.6 | 28.5 | 26 | 27.6 | 29.3 | 26.9 | 28.3 | 27.9 | 28.9 | 28.8 | 28.7 | 28.6 | 30 | 28.5 | 25.3 | 27.4 | 27.8 | 27.6 | 29.1 | 29.5 | 29 | 30.1 | 29.2 | 29.4 | 28.8 | 27 | 27.6 | 28.1 | 27 | 28.1 |
| Apparent max temperature | 31.6 | 30.5 | 29.4 | 27.5 | 29.5 | 30.1 | 28.7 | 31.9 | 30.1 | 31.1 | 32.5 | 32.1 | 30.2 | 32.3 | 31.8 | 25.7 | 29 | 29.5 | 30.6 | 30.7 | 31.3 | 30.2 | 30.9 | 29.6 | 30.2 | 28.9 | 28.3 | 27.1 | 29.1 | 27.1 | 28.9 |
| Mean temperature | 24.1 | 24.4 | 23.8 | 22.2 | 23.4 | 24 | 22.9 | 22.4 | 23.3 | 23.3 | 22.7 | 23.2 | 23.6 | 23.7 | 22.9 | 23 | 23.6 | 23.4 | 22.5 | 23.3 | 23.2 | 23.5 | 23.6 | 23.7 | 23.5 | 24.2 | 23.4 | 23.4 | 23.7 | 23.8 | 24.3 |
| Apparent mean temperature | 23.9 | 22.9 | 22.2 | 20.7 | 22 | 22.5 | 23.3 | 21.7 | 22.3 | 22 | 21.6 | 22.3 | 22.2 | 20.8 | 21.3 | 23.8 | 20.9 | 19.7 | 20.2 | 21.8 | 21.2 | 20.9 | 20.1 | 22.3 | 19.1 | 21.6 | 22.3 | 20.1 | 22.2 | 23.3 | 22.5 |
| Minimum temperature | 20.6 | 20.7 | 20.3 | 18.5 | 20.2 | 20.3 | 20.2 | 19.3 | 19.9 | 19.9 | 19.1 | 19.3 | 19.5 | 18.8 | 18.9 | 21.4 | 19.8 | 19.5 | 18.9 | 19.3 | 19 | 19.2 | 18.8 | 19.7 | 17.9 | 20.4 | 20.6 | 19.9 | 20.5 | 21.7 | 20.9 |
| Apparent min temperature | 26.7 | 26.8 | 25.6 | 24.3 | 25.8 | 26.2 | 25.8 | 25.5 | 26 | 25.9 | 26 | 26.2 | 26 | 25.9 | 25.7 | 24.8 | 24.6 | 24.3 | 24.8 | 25.6 | 25.4 | 25.3 | 24.8 | 25.3 | 25 | 25.8 | 25.2 | 24 | 25 | 25.1 | 25.2 |
| January | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 11 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 |
| Sunshine duration (h) | 10.3 | 10.3 | 10.2 | 9.8 | 10.3 | 10.2 | 7.7 | 9.5 | 10.3 | 9.9 | 10.3 | 10.3 | 10.4 | 10.4 | 7.8 | 5.5 | 10.1 | 10.4 | 10.4 | 10.4 | 10.5 | 10.5 | 10.5 | 10.5 | 10.5 | 10.5 | 10.4 | 10.5 | 10.6 | 10.6 | 10.6 |
| Precipitation (mm) | 2.2 | 0.4 | 3 | 2.6 | 4.4 | 8.6 | 9.2 | 8.9 | 0.7 | 3 | 1.8 | 2 | 0.9 | 0.4 | 5.4 | 5.7 | 0 | 0 | 0.8 | 0.1 | 0.2 | 0.3 | 0 | 0.1 | 0.2 | 0 | 4.6 | 0.8 | 0.8 | 3.4 | 0.9 |
| Precipitation hours | 8 | 4 | 10 | 14 | 15 | 7 | 8 | 14 | 5 | 6 | 5 | 6 | 3 | 3 | 8 | 11 | 0 | 0 | 5 | 1 | 1 | 2 | 0 | 1 | 2 | 0 | 13 | 5 | 8 | 14 | 6 |
| Wind speed (m/s) | 16 | 16.4 | 20 | 21.8 | 20 | 16.8 | 18.7 | 14.9 | 15 | 13.7 | 11 | 12.7 | 17.4 | 12.5 | 14.6 | 15.1 | 14.3 | 13.6 | 12.4 | 14.6 | 17.6 | 18.2 | 17.6 | 21.6 | 19.3 | 18.4 | 20.3 | 24.3 | 21.9 | 23.7 | 22.4 |
In January 2023, the highest daytime temperature in Guaynabo was 30.1°C.
While the minimum temperature at night dropped to 17.9°C.
The average nighttime and daytime temperatures during January in Guaynabo are 19.8°C and 28.3°C respectively.
The precipitation sum in January is about 71 mm.