The best times to visit Londonderry for ideal weather are

June 18th to September 30th

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

 

 


Other Londonderry Travel Info

Weather in Londonderry

Temperature

Average temperatures in Londonderry 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 23rd 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 Londonderry, 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 67.7°F (19.8°C) with temperatures rarely dropping below 52.7°F (11.5°C) at night.

Londonderry Temperatures (Fahrenheit)

Key
High
Average
Low

Londonderry 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.

Londonderry Perceived Temperature (F)

Key
High
Average
Low

Londonderry Perceived Temperature (C)

Key
High
Average
Low

 

Average Londonderry 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 45.4 40.8 35.6
Feb 47.4 41.7 36.2
Mar 50.6 43.9 37.2
Apr 57.3 49.5 41.8
May 60.3 52.6 45.2
Jun 64.1 56.6 49
Jul 65.9 58.8 52.6
Aug 64.5 58 52.1
Sep 62.4 55.9 50
Oct 57.5 51.6 45.7
Nov 50 45.3 40.1
Dec 43.7 38.5 32.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 7.4 4.9 2
Feb 8.6 5.4 2.3
Mar 10.3 6.6 2.9
Apr 14.1 9.7 5.4
May 15.7 11.4 7.3
Jun 17.8 13.7 9.4
Jul 18.8 14.9 11.4
Aug 18.1 14.4 11.2
Sep 16.9 13.3 10
Oct 14.2 10.9 7.6
Nov 10 7.4 4.5
Dec 6.5 3.6 0.2

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Londonderry are April, February, 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 4 days of significant precipitation the week of November 5th.

When can you find snow in Londonderry? 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 Londonderry.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Londonderry (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 37% 0 3.4
Feb 25% 0 2.2
Mar 29% 0 2.9
Apr 21% 0 1.7
May 28% 0 2.2
Jun 26% 0 2.2
Jul 31% 0 3.7
Aug 31% 0 3.4
Sep 27% 0 2.5
Oct 34% 0 3.6
Nov 47% 0 4.2
Dec 29% 0 3.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 37 0 8.6
Feb 25 0 5.6
Mar 29 0 7.4
Apr 21 0 4.3
May 28 0 5.6
Jun 26 0 5.6
Jul 31 0 9.4
Aug 31 0 8.6
Sep 27 0 6.4
Oct 34 0 9.1
Nov 47 0 10.7
Dec 29 0 7.9

 

Humidity and Wind

Londonderry has some extremely humid months, and above average humidity throughout the year. The least humid month is May (67.7% relative humidity), and the most humid month is December (83.8%).

Wind in Londonderry is usually moderate. The windiest month is January, followed by March and November. January’s average wind speed of around 10.3 knots (11.9 MPH or 19.1 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 20 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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 10.3 Gentle breeze 17.7 Strong breeze
Feb 8.3 Gentle breeze 15 Significant breeze
Mar 9.9 Gentle breeze 16.4 Strong breeze
Apr 7.7 Gentle breeze 13.6 Significant breeze
May 9 Gentle breeze 15.3 Strong breeze
Jun 7.1 Gentle breeze 12.5 Significant breeze
Jul 7.7 Gentle breeze 13.2 Strong breeze
Aug 7.7 Gentle breeze 13.4 Significant breeze
Sep 8.7 Gentle breeze 14.6 Strong breeze
Oct 9.2 Gentle breeze 15.5 Significant breeze
Nov 9.8 Gentle breeze 16.5 Strong breeze
Dec 7.3 Gentle breeze 14 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 81.5%
Feb 81.2%
Mar 75.5%
Apr 69.8%
May 67.7%
Jun 71.3%
Jul 75%
Aug 77.6%
Sep 77.8%
Oct 79.8%
Nov 82.8%
Dec 83.8%

 

Is it Safe to Travel to Londonderry?

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 Londonderry, the United Kingdom is July, followed by January 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 Londonderry in April. 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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 71.3 in April means 71.3% of the tourists vs. July.

 

 

Overall Londonderry Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 65.7°F (18.7°C) and 48.9°F (9.4°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 9 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 8 to 10 days of precipitation per month. June – August is the busiest season for tourism in Londonderry, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 63.4°F (17.4°C) and 44.3°F (6.8°C), which will feel chilly given the humidity and wind. It rains or snows a good amount: 8 to 14 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 Londonderry to be enjoyable for warm weather travelers. The average high during this season is between 49.3°F (9.6°C) and 40.8°F (4.9°C). On average, it rains or snows a fair amount: 7 to 12 times per month. These times of year are the second busiest with tourists.

 

Best Times to Travel› the United Kingdom › Londonderry, the United Kingdom