United StatesAverage weather for Belfast in May
It's warm in May in Belfast with an average temperature of 26°C. Temperatures this month range from a low of 22°C to a high of 29°C. At night, you can expect temperatures between 10°C and 19°C.
Start of May
The month of May starts in Belfast with warm temps, averaging around 25°C during the day and nights around 13°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid May
By mid-May, daytime temps rise to around 26°C, with nights around 16°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers.
End of May
By the end of May, the average daytime temperature in Belfast is around 28°C, while nighttime temps are about 18°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Because temperatures drop in the evening, wearing layers is recommended.
In May, there is an average of 94 mm of precipitation, spread over 9 days. The wind speed is around 3 Bft, mostly coming from the South.
Belfast in May |
New York | ||
|---|---|---|---|
 Average temperature |
26°C | 22°C | |
 Max. temperature |
29°C | 28°C | |
| Min. temperature |
22°C | -5°C | |
 Total precipitation |
94 mm | 105 mm | |
| Rainy days |
9 days | 14 days | |
April
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Belfast?
Looking for great weather? May is a good time to be in Belfast. The temperatures are nice, and there’s not too much rain.
Temperature records
With 33°C in 2019, Belfast reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 11°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 23°C.
Check out the climate of Belfast for all months and discover the best travel time
Daily Temperature in May in Belfast
This chart shows the average daily high and low temperatures in May for Belfast, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Belfast
The chart below shows the average daily precipitation in May for Belfast, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 9 days of precipitation in Belfast.
Daily UV index in May in Belfast
This chart shows the average daily UV index in May in Belfast, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Belfast over the years
This chart shows the average temperature in May in Belfast, measured in degrees Celsius, over the past few years.
Total precipitation in May in Belfast over the years
This chart shows the average precipitation in May in Belfast, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Belfast
Click on any day in May to get detailed info about the usual weather on that day in Belfast. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Belfast
Have you been to Belfast in May?
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Average weather in Belfast by month
Click on a month below to see detailed weather info for Belfast. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
