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Northern IrelandThe weather in January in Belfast
It's cold in January in Belfast with an average temperature of 8°C. Temperatures this month range from a low of 6°C to a high of 10°C. At night, you can expect temperatures between 2°C and 5°C.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Belfast, Northern Ireland. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Precipitation and snowfall
In January, there is an average of 91 mm of precipitation, spread over 12 days. Of the total precipitation, about 0,9 cm falls as snow in January. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in January for Belfast
Click on any day in January to get detailed info about the usual weather on that day in Belfast. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Belfast | New York | |
|---|---|---|
| Average temperature | 8°C | 5°C |
| Max. temperature | 10°C | 11°C |
| Min. temperature | 2°C | -5°C |
| Total precipitation | 91 mm | 97 mm |
| Rainy days | 12 days | 12 days |
| Total snowfall | 0,9 cm | 16 cm |
| Snowy days | 1 day | 8 days |
Start of January
The month of January starts in Belfast with cold temps, averaging around 9°C during the day and nights around 4°C.
Mid January
By mid-January, daytime temps drop to around 7°C, with nights around 3°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of January
By the end of January, the average daytime temperature in Belfast is around 9°C, while nighttime temps are about 4°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
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Temperature charts
These charts show the average temperatures in January in Belfast, Northern Ireland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Belfast
Temperature in January in Belfast over the years
Precipitation charts
These charts show the average amount of precipitation in January in Belfast, Northern Ireland. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Belfast
Total precipitation in January in Belfast over the years
Daily Snowfall in January in Belfast
Snowfall in January in Belfast per year
Daily UV index in January in Belfast
This chart shows the average daily UV index in January in Belfast, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Belfast
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Average weather in Belfast by month
Click on a month below to see detailed weather info for Belfast. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.