SeasonMapSaint Helier (Channel Islands) weather in January
Jersey
January in Saint Helier: cold, rainy, with clean air — a fair time to visit.
#11 of 12 months in Saint Helier · #1021 of 1383 destinations to visit in January · comfort 55/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Saint Helier in January
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Saint Helier climate normals — January
| Daytime high | 9°C / 49°F | 🧥 cold |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Sea temperature | 10°C / 50°F | 🥶 cold sea |
| Rainfall | 107 mm / 4.2 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 5°C / 41°F | |
| Sunshine | 4.2 h/day | |
| Daylight | 8.7 h | |
| Wind | 37 km/h / 23 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Saint Helier in January
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietschool holidays in 7 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Saint Helier's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherSaint Helier's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Saint Helier — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Saint Helier?
Saint Helier in January — FAQ
- Is January a good time to visit Saint Helier?
- January in Saint Helier: cold, rainy, with clean air — a fair time to visit. It ranks #11 of 12 months for Saint Helier on SeasonMap's comfort score (55/100).
- What is the weather like in Saint Helier in January?
- In January, Saint Helier averages a daily high of 9.3°C and a low of 7.2°C, with about 106.7 mm of rain over roughly 17.2 rainy days.
- What is the air quality in Saint Helier in January?
- Saint Helier has a mean US Air Quality Index of about 35 in January.
Other months in Saint Helier
Compare Saint Helier in January
Warmer or cooler than Saint Helier in January
Similar destinations in Western Europe — January
Within 300 km: Bournemouth's Winter waders on Poole Harbour around 15 Oct – 10 Mar, and Isle of Wight's Brent geese and winter waders around 1 Oct – 15 Mar.