JerseyThe weather in January in Saint Helier
It's cool in January in Saint Helier with an average temperature of 10°C. Temperatures this month range from a low of 7°C to a high of 11°C. At night, you can expect temperatures between 3°C and 8°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 Saint Helier, Jersey. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 14°C in 2022, Saint Helier reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 1°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 12°C.
Water temperature
The water temperature at Saint Helier is 10°C this month. This is too cold to swim without protective gear.
Rainfall amount
In January, there is an average of 81 mm of precipitation, spread over 11 days. The wind speed is around 5 Bft, mostly coming from the Southwest.
Daily weather in January for Saint Helier
Click on any day in January to get detailed info about the usual weather on that day in Saint Helier. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Saint Helier | New York | |
|---|---|---|
| Average temperature | 10°C | 5°C |
| Max. temperature | 11°C | 11°C |
| Min. temperature | 3°C | -5°C |
| Total precipitation | 81 mm | 97 mm |
| Rainy days | 11 days | 12 days |
Start of January
The month of January starts in Saint Helier with cold temps, averaging around 11°C during the day and nights around 7°C.
Mid January
By mid-January, daytime temps drop to around 9°C, with nights around 5°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 Saint Helier is around 10°C, while nighttime temps are about 6°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Saint Helier for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Saint Helier, Jersey. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Saint Helier
Temperature in January in Saint Helier over the years
Precipitation charts
These charts show the average amount of precipitation in January in Saint Helier, Jersey. 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 Saint Helier
Total precipitation in January in Saint Helier over the years
Daily UV index in January in Saint Helier
This chart shows the average daily UV index in January in Saint Helier, 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 Saint Helier
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Average weather in Saint Helier by month
Click on a month below to see detailed weather info for Saint Helier. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.