Average temperature in January is 22.3 °C
Average daytime temperature is 23.3 °C
Average night temperature is 21.1 °C
Absolute maximum temperature: 25.1 °C
Absolute minimum temperature: 14.3 °C
Number of sunny days: 21
Number of rainy days: 10
Number of snow days:
Precipitation sum: 5 mm
* Weather data for Key West United States 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 | 24.1 | 24.4 | 25.1 | 25.1 | 25.1 | 24.8 | 22.5 | 23.4 | 23 | 21.7 | 21.6 | 23.2 | 23.6 | 21.5 | 18 | 18.5 | 22.2 | 23.2 | 23.5 | 23.2 | 23.9 | 24.4 | 25.1 | 24.1 | 24.9 | 24.7 | 20.3 | 23.9 | 24.3 | 24.3 | 24.8 |
| Apparent max temperature | 28.5 | 26.6 | 27.1 | 28.3 | 29.8 | 28 | 22 | 24.5 | 25.8 | 21.8 | 18.8 | 25.6 | 25.3 | 17.9 | 12.9 | 17.8 | 22.9 | 23.6 | 25.5 | 27.9 | 26.8 | 27.6 | 28.3 | 25.2 | 27.7 | 28.4 | 18.2 | 24.4 | 25 | 27.6 | 28.4 |
| Mean temperature | 23.5 | 23.6 | 24.7 | 24.8 | 24.8 | 22.2 | 21.5 | 22.7 | 22.2 | 21.2 | 20.1 | 21.9 | 21.9 | 18.6 | 15.9 | 17 | 21.1 | 21.9 | 23.2 | 22.7 | 22.9 | 23.9 | 23.8 | 22.5 | 24.7 | 22.9 | 19.5 | 21.7 | 23.8 | 24.1 | 24.5 |
| Apparent mean temperature | 26.3 | 24.3 | 24.8 | 25.3 | 25.8 | 17.8 | 18.5 | 21 | 21.1 | 19.9 | 17.2 | 18.8 | 18 | 9.7 | 11.9 | 11.8 | 17.6 | 20.8 | 22.8 | 24.2 | 24.1 | 23.7 | 22.1 | 20.5 | 24.4 | 17.8 | 15.7 | 17.1 | 22.5 | 24.9 | 24.7 |
| Minimum temperature | 23.2 | 22.8 | 24.3 | 24.4 | 24.1 | 20.7 | 20.5 | 21.6 | 21.2 | 20.9 | 19.2 | 20.1 | 20.8 | 16.6 | 14.3 | 15.4 | 18.9 | 20.2 | 22.9 | 21.9 | 21.6 | 23 | 21.8 | 21 | 24.4 | 20.2 | 18.6 | 19.5 | 23.4 | 23.6 | 23.9 |
| Apparent min temperature | 27.1 | 25.7 | 25.8 | 26.5 | 27.5 | 21.7 | 19.8 | 22.5 | 23.3 | 20.9 | 18.1 | 22.4 | 22.6 | 13.1 | 12.5 | 14.9 | 20.5 | 22.5 | 24.1 | 25.5 | 25.2 | 25 | 25.8 | 22.8 | 25.3 | 24.7 | 16.9 | 20.5 | 23.5 | 26 | 25.9 |
| 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) | 10.6 | 10.6 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 11 | 11 | 11 | 11 | 11 |
| Sunshine duration (h) | 9.8 | 9.6 | 9.7 | 9.8 | 9.8 | 9.7 | 9.8 | 9.9 | 9.8 | 9.9 | 9.9 | 9.9 | 9.3 | 9.9 | 9.7 | 10 | 9.6 | 10 | 9.9 | 10 | 9.8 | 9.9 | 10 | 9.9 | 10 | 9.9 | 7.8 | 10 | 10 | 10.2 | 10.2 |
| Precipitation (mm) | 0 | 0 | 0 | 0.2 | 0 | 0.1 | 0 | 0 | 0.1 | 0 | 0 | 0 | 1.4 | 0.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.6 | 0.8 | 0 | 1.5 | 0 | 0.3 | 0 | 0.1 | 0 |
| Precipitation hours | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 0 | 4 | 0 | 3 | 0 | 1 | 0 |
| Wind speed (m/s) | 14.7 | 24.1 | 27.1 | 30.1 | 24.5 | 31.1 | 30.1 | 27.3 | 25.1 | 23.8 | 28.2 | 15.2 | 37.8 | 48.8 | 36.8 | 23.4 | 22.2 | 24 | 24 | 17.9 | 17.1 | 28.2 | 24.8 | 29 | 31.7 | 34.7 | 38.3 | 35.2 | 35 | 26.1 | 23.8 |
In January 2023, the highest daytime temperature in Key West was 25.1°C.
While the minimum temperature at night dropped to 14.3°C.
The average nighttime and daytime temperatures during January in Key West are 21.1°C and 23.3°C respectively.
The precipitation sum in January is about 5 mm.