The best times to visit Saint Helens for ideal weather are

May 28th to October 7th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Saint Helens Travel Info

Weather in Saint Helens

Temperature

Average temperatures in Saint Helens vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 26th 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 Saint Helens, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 68.5°F (20.3°C) with temperatures rarely dropping below 56.8°F (13.8°C) at night.

Saint Helens Temperatures (Fahrenheit)

Key
High
Average
Low

Saint Helens Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

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.

Saint Helens Perceived Temperature (F)

Key
High
Average
Low

Saint Helens Perceived Temperature (C)

Key
High
Average
Low

 

Average Saint Helens 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.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 45.3 41.6 37.5
Feb 45.9 41.5 37
Mar 49.9 44.1 38.3
Apr 55.9 48.9 41.9
May 60.1 53.6 47.2
Jun 65 58.4 51.7
Jul 67.6 61.6 56
Aug 66.7 61.3 56.1
Sep 63.6 57.8 51.9
Oct 58.4 53.2 47.9
Nov 51.3 47.1 42.4
Dec 46.3 42.2 37.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 7.4 5.3 3.1
Feb 7.7 5.3 2.8
Mar 9.9 6.7 3.5
Apr 13.3 9.4 5.5
May 15.6 12 8.4
Jun 18.3 14.7 10.9
Jul 19.8 16.4 13.3
Aug 19.3 16.3 13.4
Sep 17.6 14.3 11.1
Oct 14.7 11.8 8.8
Nov 10.7 8.4 5.8
Dec 7.9 5.7 2.9

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Saint Helens are April, March, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid April. For example, on the week of April 16th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early November with an average of 3 days of significant precipitation the week of November 5th.

When can you find snow in Saint Helens? Weather stations report no annual snow. 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 Saint Helens.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Saint Helens (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 28% 0 2.8
Feb 21% 0 1.9
Mar 18% 0 1.6
Apr 16% 0 1.5
May 23% 0 2.2
Jun 21% 0 2.5
Jul 32% 0 3.6
Aug 29% 0 4
Sep 22% 0 3
Oct 30% 0 3.1
Nov 36% 0 3.2
Dec 36% 0 3.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 28 0 7.1
Feb 21 0 4.8
Mar 18 0 4.1
Apr 16 0 3.8
May 23 0 5.6
Jun 21 0 6.4
Jul 32 0 9.1
Aug 29 0 10.2
Sep 22 0 7.6
Oct 30 0 7.9
Nov 36 0 8.1
Dec 36 0 9.7

 

Humidity and Wind

Saint Helens has some extremely humid months, and above average humidity throughout the year. The least humid month is May (68.2% relative humidity), and the most humid month is January (81.1%).

Wind in Saint Helens is usually stronger than many places. The windiest month is January, followed by December and November. January’s average wind speed of around 13.4 knots (15.4 MPH or 24.8 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 23.9 knots, which is considered a strong breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Saint Helens.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

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 13.4 Significant breeze 20.5 Strong breeze
Feb 11 Significant breeze 17.7 Strong breeze
Mar 11.2 Significant breeze 17.9 Strong breeze
Apr 9.9 Gentle breeze 16.2 Significant breeze
May 11.5 Significant breeze 17.8 Strong breeze
Jun 10.3 Gentle breeze 16.3 Significant breeze
Jul 11.1 Significant breeze 17.3 Strong breeze
Aug 11.7 Significant breeze 17.8 Strong breeze
Sep 11.3 Significant breeze 17.1 Strong breeze
Oct 11.4 Significant breeze 17.4 Strong breeze
Nov 12.7 Significant breeze 19.8 Strong breeze
Dec 13.3 Significant breeze 20.9 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 81.1%
Feb 79.5%
Mar 74.4%
Apr 70.1%
May 68.2%
Jun 70.9%
Jul 72.8%
Aug 73.2%
Sep 74.4%
Oct 76.7%
Nov 79.8%
Dec 80.1%

 

Is it Safe to Travel to Saint Helens?

Our best data indicates this area is somewhat safe. As of Dec 04, 2023 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 Nov 27, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Saint Helens, the United Kingdom is January, followed by June and July. 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 Saint Helens in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 59.1 in December means 59.1% of the tourists vs. January.

 

 

Overall Saint Helens Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 63°F (17.2°C) and 47.9°F (8.8°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 7 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 6 to 10 days of precipitation per month. June – August is the busiest season for tourism in Saint Helens, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 65°F (18.3°C) and 47.2°F (8.4°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 7 to 11 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is too cold this time of year in Saint Helens to be enjoyable for warm weather travelers. The average high during this season is between 47.9°F (8.8°C) and 43.8°F (6.6°C). On average, it rains or snows a fair amount: 6 to 11 times per month. These times of year are the second busiest with tourists.

 

Best Times to Travel› the United Kingdom › Saint Helens, the United Kingdom