The best times to visit Harlech for ideal weather are

June 18th to September 9th

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



Other Harlech Travel Info

Weather in Harlech


Average temperatures in Harlech vary somewhat. Considering humidity, temperatures feel cold for most of the year with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 13th 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 Harlech, 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 65.3°F (18.5°C) with temperatures rarely dropping below 52.3°F (11.3°C) at night.

Harlech Temperatures (Fahrenheit)


Harlech Temperatures (Celsius)


“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.

Harlech Perceived Temperature (F)


Harlech Perceived Temperature (C)



Average Harlech 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 44.1 39.9 35.1
Feb 44.4 39.6 34.7
Mar 48 41.7 35.2
Apr 53.7 46.2 38.5
May 57 50.4 43.9
Jun 62.1 55.2 47.7
Jul 64 57.8 51.7
Aug 62.7 57.1 51.6
Sep 60.6 54.2 47.6
Oct 55.8 50.6 44.9
Nov 49.6 45.3 40.2
Dec 45.2 41 35.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 6.7 4.4 1.7
Feb 6.9 4.2 1.5
Mar 8.9 5.4 1.8
Apr 12.1 7.9 3.6
May 13.9 10.2 6.6
Jun 16.7 12.9 8.7
Jul 17.8 14.3 10.9
Aug 17.1 13.9 10.9
Sep 15.9 12.3 8.7
Oct 13.2 10.3 7.2
Nov 9.8 7.4 4.6
Dec 7.3 5 2.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Harlech are June, April, 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 mid April. For example, on the week of April 16th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early December with an average of 5 days of significant precipitation the week of December 3rd.

When can you find snow in Harlech? 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 Harlech.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 58% 0 13.7
Feb 44% 0 6.8
Mar 38% 0 6
Apr 33% 0 4.7
May 40% 0 5.8
Jun 32% 0 5.7
Jul 47% 0 8.2
Aug 53% 0 8.7
Sep 38% 0 7.3
Oct 48% 0 10.2
Nov 61% 0 12.5
Dec 60% 0 16.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 58 0 34.8
Feb 44 0 17.3
Mar 38 0 15.2
Apr 33 0 11.9
May 40 0 14.7
Jun 32 0 14.5
Jul 47 0 20.8
Aug 53 0 22.1
Sep 38 0 18.5
Oct 48 0 25.9
Nov 61 0 31.8
Dec 60 0 41.9


Humidity and Wind

Harlech has some very humid months, and high humidity throughout the year. The least humid month is May (71.4% relative humidity), and the most humid month is October (80.4%).

Wind in Harlech is usually stronger than many places. The windiest month is January, followed by December and November. January’s average wind speed of around 16 knots (18.4 MPH or 29.6 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 28.1 knots, which is considered high wind or moderate gale winds.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 16 Significant breeze 25.7 Very strong breeze
Feb 12.8 Significant breeze 21.4 Strong breeze
Mar 13 Significant breeze 21.8 Very strong breeze
Apr 11.3 Significant breeze 19.2 Strong breeze
May 12.9 Significant breeze 21 Very strong breeze
Jun 10.7 Gentle breeze 18.1 Strong breeze
Jul 11.2 Significant breeze 19.1 Very strong breeze
Aug 12 Significant breeze 19.6 Strong breeze
Sep 10.9 Gentle breeze 18.4 Very strong breeze
Oct 12.9 Significant breeze 21.7 Strong breeze
Nov 14.1 Significant breeze 23.5 Very strong breeze
Dec 15.9 Significant breeze 26.1 Very strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 79.9%
Feb 78.3%
Mar 74%
Apr 71.4%
May 71.4%
Jun 73.9%
Jul 78.8%
Aug 80.1%
Sep 80.2%
Oct 80.4%
Nov 80%
Dec 80%


Is it Safe to Travel to Harlech?

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 Harlech, 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 Harlech 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

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 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 Harlech Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 61.1°F (16.2°C) and 46°F (7.8°C) with warmer temperatures in the later months. Rain is very common with 10 to 12 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 brisk. These months see moderate precipitation with 9 to 16 days of precipitation per month. June – August is the busiest season for tourism in Harlech, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 61.7°F (16.5°C) and 45.9°F (7.7°C), which will feel chilly given the humidity and wind. It rains or snows a great amount: 11 to 18 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 Harlech to be enjoyable for warm weather travelers. The average high during this season is between 46.6°F (8.1°C) and 42.3°F (5.7°C). On average, it rains or snows a very great amount: 12 to 19 times per month. These times of year are the second busiest with tourists.


Best Times to Travelthe United Kingdom › Harlech, the United Kingdom