Weather in Northern Ireland

Calculated from weather data of Belfast International Airport (EGAA) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	6.9	6.5	7.2	7.7	5.2	8.0
February	8.1	9.0	8.9	8.1	7.5	7.7
March	9.5	9.6	9.3	11.0	9.9	8.9
April	11.8	11.8	11.8	11.9	11.0	13.6
May	15.5		16.1	15.0	13.5	15.8
June	18.2		20.5	17.0	17.8	17.6
July	18.9		17.3	19.3	21.5	16.6
August	18.3		18.1	19.8	18.5	18.1
September	16.4		17.6	16.5	17.5	16.1
October	13.0		13.5	13.6	13.9	11.9
November	9.7		9.3	11.0	10.1	10.5
December	7.6		8.5	5.0	8.4	6.7
Average	12.4	9.2	13.2	13.3	12.9	12.6

77th highest temperature of United Kingdom

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	2.2	2	3	3	0	3
February	2.8	4	4	3	3	3
March	2.8	3	3	2	4	2
April	3.9	4	4	4	1	4
May	6.3		6	8	5	6
June	10.1		11	10	10	10
July	11.4		11	11	12	11
August	11.3		12	11	12	11
September	9.4		11	10	11	9
October	7.3		8	8	9	6
November	4.4		3	6	6	5
December	3.2		5	-1	5	2
Average	5.9	3.1	6.7	6.5	6.2	6.0

21st lowest temperature of United Kingdom

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
30 °C or warmer	0	0	0	0	0
25 °C or warmer	0	2	4	7	1
20 °C or warmer	0	31	20	27	23
0 °C or colder	17	32	26	35	26

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	11.2	12	10	8	11	8
February	13.9	13	6	16	19	23
March	14.2	17	20	10	10	9
April	10.4	16	11	11	3	4
May	9.0		5	13	13	4
June	9.9		8	9	5	13
July	10.7		19	5	6	15
August	11.6		10	4	12	16
September	12.0		16	11	7	9
October	13.6		14	15	11	15
November	11.9		8	6	9	14
December	13.9		18	9	13	19
Average	11.9	14.8	11.8	9.4	9.0	11.8

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (km/h)

Month	Average	2024	2023	2022	2021	2020
January	17.4	17	18	18	13	20
February	21.3	19	19	26	21	27
March	18.8	20	17	17	18	20
April	17.8	20	17	18	15	17
May	15.6		14	18	16	17
June	15.1		13	17	15	17
July	14.7		18	15	11	16
August	15.1		17	15	13	14
September	16.1		16	16	14	16
October	18.1		18	20	18	18
November	16.9		16	19	18	17
December	16.8		21	11	18	15
Average	16.9	19.1	16.5	17.3	15.3	17.5

52nd highest wind speed of United Kingdom

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	SW	SW	SW	SW	SW
February	SW	SW	W	SE	SW
March	SE	S	SE	SW	SW
April	W	SE	SE	NE	SE
May		W	SW	S	S
June		SE	SW	W	NW
July		SW	W	NW	W
August		W	W	W	SE
September		SW	NW	SW	SW
October		S	SW	SW	W
November		W	S	W	S
December		SW	S	SW	SW

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Northern Ireland weather Q&A

What is the warmest month in Northern Ireland?

The warmest month is July with an average temperature of 19 °C over the past years.

What is the coldest month in Northern Ireland?

The coldest month is January with an average daytime temperature of 7 °C in the past few years.

Which month is the wettest in Northern Ireland?

Chance of precipitation is the highest in March with a probability of around 14.2 %.

Which month is the driest in Northern Ireland?

The least rainfall and snow can be expected in May. The probability is about 9.1 %.