The best times to visit Penarth for ideal weather are

June 11th to September 23rd

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



Other Penarth Travel Info

Weather in Penarth


Average temperatures in Penarth 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 20th 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 Penarth, 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 69°F (20.6°C) with temperatures rarely dropping below 52.1°F (11.2°C) at night.

Penarth Temperatures (Fahrenheit)


Penarth 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.

Penarth Perceived Temperature (F)


Penarth Perceived Temperature (C)



Average Penarth 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 46.5 42.5 34.7
Feb 46.8 42.2 34.9
Mar 50.6 44.7 35.9
Apr 56.3 49.3 39.6
May 60.1 53.7 43.6
Jun 64.9 58.6 48.2
Jul 67.5 61.5 50.8
Aug 66.6 61 51.7
Sep 64.2 58 48.2
Oct 59 53.8 43.8
Nov 52.5 48.3 40.6
Dec 47.8 43.5 36.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.1 5.8 1.5
Feb 8.2 5.7 1.6
Mar 10.3 7.1 2.2
Apr 13.5 9.6 4.2
May 15.6 12.1 6.4
Jun 18.3 14.8 9
Jul 19.7 16.4 10.4
Aug 19.2 16.1 10.9
Sep 17.9 14.4 9
Oct 15 12.1 6.6
Nov 11.4 9.1 4.8
Dec 8.8 6.4 2.7



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Penarth are April, September, 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 April. For example, on the week of April 2nd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid January with an average of 4 days of significant precipitation the week of January 15th.

When can you find snow in Penarth? Weather stations report large amounts of snow likely to be deepest around October, especially close to early to mid October. The best time to ski (if at all) in Penarth is often around around April 9th 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 Penarth.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 41% 2.6 4.4
Feb 28% 2 2.6
Mar 23% 0.8 2.1
Apr 19% 0.7 1.8
May 26% 0.9 3
Jun 25% 0.8 2.9
Jul 34% 0 4.3
Aug 34% 0.8 4.2
Sep 23% 0 2.8
Oct 32% 5.9 3.5
Nov 44% 0.7 4.4
Dec 35% 1.4 4.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 41 6.6 11.2
Feb 28 5.1 6.6
Mar 23 2 5.3
Apr 19 1.8 4.6
May 26 2.3 7.6
Jun 25 2 7.4
Jul 34 0 10.9
Aug 34 2 10.7
Sep 23 0 7.1
Oct 32 15 8.9
Nov 44 1.8 11.2
Dec 35 3.6 10.7


Humidity and Wind

Penarth has some extremely humid months, and high humidity throughout the year. The least humid month is April (71.3% relative humidity), and the most humid month is January (82.4%).

Wind in Penarth is usually moderate. The windiest month is January, followed by December and November. January’s average wind speed of around 10.8 knots (12.4 MPH or 20 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid January where average top sustained speeds reach 18.1 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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 10.8 Gentle breeze 17 Strong breeze
Feb 9.4 Gentle breeze 15.1 Significant breeze
Mar 9.6 Gentle breeze 15.1 Strong breeze
Apr 8.7 Gentle breeze 13.9 Significant breeze
May 9.9 Gentle breeze 15.4 Strong breeze
Jun 8.6 Gentle breeze 13.6 Significant breeze
Jul 8.8 Gentle breeze 13.9 Strong breeze
Aug 8.5 Gentle breeze 13.6 Significant breeze
Sep 8.7 Gentle breeze 13.7 Strong breeze
Oct 9 Gentle breeze 14.1 Significant breeze
Nov 10.2 Gentle breeze 16.2 Strong breeze
Dec 10.8 Gentle breeze 17 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 82.4%
Feb 80.8%
Mar 75%
Apr 71.3%
May 71.6%
Jun 72.5%
Jul 74.3%
Aug 75.5%
Sep 75.4%
Oct 78.8%
Nov 81.3%
Dec 81.4%


Is it Safe to Travel to Penarth?

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 Penarth, the United Kingdom is September, followed by August and October. 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 Penarth 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 very reliable. Displayed data is calculated relative to the peak, so a score of 62.4 in December means 62.4% of the tourists vs. September.



Overall Penarth Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 63.3°F (17.4°C) and 48.4°F (9.1°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is fairly slow 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 7 to 11 days of precipitation per month. June – August is the second busiest season for tourism in Penarth, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 65.7°F (18.7°C) and 48.4°F (9.1°C), which will feel chilly given the humidity and wind. It rains or snows a good amount: 7 to 13 days per month. Tourism is the busiest during these months due to the weather, so hotels may be higher priced.

Winter (December through February)

Weather is too cold this time of year in Penarth to be enjoyable for warm weather travelers. The average high during this season is between 49°F (9.4°C) and 44.7°F (7.1°C). On average, it rains or snows a great amount: 8 to 13 times per month. These times of year are the slowest with tourists.


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