SeasonMapSaint Helier (Channel Islands) weather in May
Jersey
May in Saint Helier: cool, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Saint Helier · #591 of 1383 destinations to visit in May · comfort 82/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Saint Helier in May
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Saint Helier climate normals — May
| Daytime high | 14°C / 57°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 53°F | |
| Sea temperature | 14°C / 57°F | 🥶 cold sea |
| Rainfall | 47 mm / 1.9 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 15.3 h | |
| Wind | 30 km/h / 19 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Saint Helier in May
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.
BusyLiberation Day, school holidays in 4 of the markets that fill it(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).
Fair weatherSaint Helier's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Saint Helier in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Holiday
Liberation Day
9 MayNational holidayCrowdedClosuresThe island's own national day on 9 May, marking the end of the German occupation: parades and a service in Liberation Square, and most of St Helier shut for it. The one date Jersey plans around. Source ↗
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 May — FAQ
- Is May a good time to visit Saint Helier?
- May in Saint Helier: cool, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Saint Helier on SeasonMap's comfort score (82/100).
- What is the weather like in Saint Helier in May?
- In May, Saint Helier averages a daily high of 14.1°C and a low of 11.4°C, with about 47.3 mm of rain over roughly 9.6 rainy days.
- What is the air quality in Saint Helier in May?
- Saint Helier has a mean US Air Quality Index of about 45 in May.
Other months in Saint Helier
Compare Saint Helier in May
Warmer or cooler than Saint Helier in May
Similar destinations in Western Europe — May
Within 300 km: Brighton's Brighton Festival and Fringe on 1–31 May, and Bath's The Bath Festival on 16–24 May.