The best times to visit St Helier for ideal weather are
May 28th to October 14th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
St Helier Travel Guide
Other St Helier Travel Info
Weather in St Helier
Average temperatures in St Helier vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 60th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit St Helier, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 70.2°F (21.2°C) with temperatures rarely dropping below 57.8°F (14.3°C) at night.
St Helier Temperatures (Fahrenheit)
St Helier Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
St Helier Perceived Temperature (F)
St Helier Perceived Temperature (C)
Average St Helier Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in St Helier are January, February, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid to late November with an average of 2 days of significant precipitation the week of November 19th.
When can you find snow in St Helier? Weather stations report a very small amount of seasonal snow likely to be deepest around January, especially close to early January. The best time to ski (if at all) in St Helier is often around around January 1st when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in St Helier.
Snow on the Ground
The graph below shows the average snow on the ground in St Helier (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
St Helier has some very humid months, and high humidity throughout the year. The least humid month is April (72.3% relative humidity), and the most humid month is January (79.6%).
Wind in St Helier is usually stronger than many places. The windiest month is December, followed by January and November. December’s average wind speed of around 13.8 knots (15.9 MPH or 25.6 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early December where average top sustained speeds reach 23.4 knots, which is considered a strong breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in St Helier.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||13||Significant breeze||20.3||Strong breeze|
|Feb||12.2||Significant breeze||18.8||Strong breeze|
|Mar||11.7||Significant breeze||18||Strong breeze|
|Apr||10.4||Gentle breeze||16||Significant breeze|
|May||10.6||Gentle breeze||16.5||Strong breeze|
|Jun||10||Gentle breeze||15.5||Significant breeze|
|Jul||10.1||Gentle breeze||15.6||Strong breeze|
|Aug||9.8||Gentle breeze||15.4||Significant breeze|
|Sep||10.3||Gentle breeze||15.7||Strong breeze|
|Oct||11.2||Significant breeze||17.4||Strong breeze|
|Nov||12.9||Significant breeze||20.2||Strong breeze|
|Dec||13.8||Significant breeze||21.7||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to St Helier?
Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for the United Kingdom; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 06, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in St Helier, the United Kingdom is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit St Helier in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall St Helier Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 62.8°F (17.1°C) and 48.9°F (9.4°C) with warmer temperatures in the later months. Rain is nonexistent with roughly 0 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with about 0 days of precipitation per month. June – August is the busiest season for tourism in St Helier, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 67.8°F (19.9°C) and 50.4°F (10.2°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is too cold this time of year in St Helier to be enjoyable for warm weather travelers. The average high during this season is between 50.5°F (10.3°C) and 45.9°F (7.7°C). On average, it rains or snows a smalll amount: 0 to 3 times per month. These times of year are fairly slow with tourists.