Temperatures in January
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Saint Helier in January. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of January
The month of January starts in Saint Helier with cold temperatures, averaging around 11°C during the day and nights close to 7°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-January
By mid-January, the average daytime temperature drops to around 9°C, with nights close to 5°C. There might be a few showers during this period, but plenty of dry days with sunshine too. Wear a thick coat, jumper, and long trousers.
End of January
By the end of January, the average daytime temperature in Saint Helier will be around 10°C, with nights close to 6°C. A shower might show up, but overall the weather will be dry and sunny.
Water temperature
The water temperature at Saint Helier is 10°C this month. This is too cold to swim without protective gear.
Precipitation in January
In January, there is an average of 81 mm of precipitation, spread over 13 days. The wind speed is around 5 Bft, mostly coming from the Southwest.
The average precipitation chance is 43% per day this month. The weather’s variable. There are also a few days with higher precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in January for Saint Helier. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Saint Helier in January |
London | ||
|---|---|---|---|
 Average Temperature |
10°C | 8°C | |
 High Temp |
11°C | 9°C | |
| Low Temp |
7°C | 6°C | |
 Total Precipitation |
81 mm | 58 mm | |
| Rainy Days |
13 days | 9 days | |
December
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.
Temperature records for Saint Helier in January
With 14°C, Saint Helier hit the highest temperature in the last 10 years in January 2022. The lowest daytime temperature in this month was 1°C in 2017. The extreme night temperatures ranged from a low of -3°C to a high of 12°C.
Check out the climate of Saint Helier for all months and discover the best travel time
Daily Temperature in January in Saint Helier
This chart shows the average daily temperatures, both day and night, for each day in January in Saint Helier, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in January in Saint Helier
The chart below shows the average daily precipitation in January for Saint Helier, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for January, you can expect around 13 days of rain in Saint Helier.
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.
Temperature in January in Saint Helier Over the Years
This chart shows the average temperature in January in Saint Helier, measured in degrees Celsius, over the past years.
Total Precipitation in January in Saint Helier Over the Years
This chart shows the average precipitation in January in Saint Helier, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in January for Saint Helier
Click on a specific day in January for detailed info on the typical weather on that day in Saint Helier. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Saint Helier
Have you been to Saint Helier in January?
Share your weather experience in January in Saint Helier.
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.
Or check out the climate of Saint Helier for all months at once
