Last updated: March 2, 2024
The weather in Belfast, United States, during January is characterized by an average temperature of -4°C (24°F). Highs can soar to 10°C (49°F), while lows may dip to -20°C (-3°F). Typically, the humidity level in Belfast throughout January hovers around 88%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In January, Belfast averages 93 mm (3.7 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 9 hours 15 minutes of daylight, with the sun shining for approximately 4 hours 40 minutes each day. Additionally, there is a 41% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In January, the UV Index in Belfast reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 10:00 and 12:00, during which unprotected skin may burn in as little as 45 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||