The best times to visit Belfast 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 Belfast Travel Info

Weather in Belfast

Temperature

Average temperatures in Belfast 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 11th 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 Belfast, 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 67.3°F (19.6°C) with temperatures rarely dropping below 49.6°F (9.8°C) at night.

Belfast Temperatures (Fahrenheit)

Key
High
Average
Low

Belfast 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.

Belfast Perceived Temperature (F)

Key
High
Average
Low

Belfast Perceived Temperature (C)

Key
High
Average
Low

 

Average Belfast 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan44.739.933
Feb46.340.733.1
Mar49.442.333.1
Apr55.547.336.4
May59.151.240.3
Jun63.856.145.1
Jul66.358.847.9
Aug64.757.846.7
Sep61.85544.4
Oct56.550.539.9
Nov49.844.837
Dec45.440.233.4

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan7.14.40.6
Feb7.94.80.6
Mar9.75.70.6
Apr13.18.52.4
May15.110.74.6
Jun17.713.47.3
Jul19.114.98.8
Aug18.214.38.2
Sep16.612.86.9
Oct13.610.34.4
Nov9.97.12.8
Dec7.44.60.8

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Belfast are April, June, and then May. 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 mid November with an average of 3 days of significant precipitation the week of November 12th.

When can you find snow in Belfast? Weather stations report very large amounts of snow likely to be deepest around March, especially close to late January. The best time to ski (if at all) in Belfast is often around around March 19th 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 Belfast.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan34%7.73.2
Feb29%02.3
Mar25%252.1
Apr20%1.21.6
May24%02.1
Jun23%1.22.5
Jul34%03.3
Aug33%04
Sep24%02.2
Oct32%03.3
Nov35%13.5
Dec31%2.53.3

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan3419.68.1
Feb2905.8
Mar2563.55.3
Apr2034.1
May2405.3
Jun2336.4
Jul3408.4
Aug33010.2
Sep2405.6
Oct3208.4
Nov352.58.9
Dec316.48.4

 

Humidity and Wind

Belfast has some extremely humid months, and high humidity throughout the year. The least humid month is April (72.3% relative humidity), and the most humid month is December (87.6%).

Wind in Belfast is usually moderate. The windiest month is January, followed by March and December. January’s average wind speed of around 9.7 knots (11.1 MPH or 17.9 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 late January and early February where average top sustained speeds reach 17.7 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan9.7Gentle breeze16.8Significant breeze
Feb8.5Gentle breeze15.3Significant breeze
Mar9.3Gentle breeze15.8Significant breeze
Apr8.3Gentle breeze14.4Significant breeze
May9Gentle breeze15.1Significant breeze
Jun7.8Gentle breeze13.3Significant breeze
Jul7.8Gentle breeze13.2Significant breeze
Aug7.8Gentle breeze13.4Significant breeze
Sep8.2Gentle breeze13.5Significant breeze
Oct8.3Gentle breeze14.3Significant breeze
Nov8.9Gentle breeze15.2Significant breeze
Dec9.1Gentle breeze15.9Significant breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan86.5%
Feb85%
Mar78.4%
Apr72.3%
May72.5%
Jun73.7%
Jul77%
Aug79.3%
Sep80.2%
Oct83.5%
Nov86.7%
Dec87.6%

 

Is it Safe to Travel to Belfast?

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 Belfast, 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 Belfast 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 very reliable. 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 Belfast Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 63.4°F (17.4°C) and 48°F (8.9°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 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 7 to 10 days of precipitation per month. June – August is the busiest season for tourism in Belfast, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 63°F (17.2°C) and 45.7°F (7.6°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 7 to 10 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 Belfast to be enjoyable for warm weather travelers. The average high during this season is between 48°F (8.9°C) and 44.1°F (6.7°C). On average, it rains or snows a fair amount: 8 to 11 times per month. These times of year are the second busiest with tourists.

 

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