Weather in Belfast in May

General weather information about Belfast

Average annual temperature is 9.1 °C

Absolute maximum temperature: 30.6 °C

Absolute minimum temperature: -18.7 °C

Number of sunny days: 125 days

Number of rainy days: 197 days

Number of snow days: 43 days

Look at detailed online map of Belfast

* Weather data for Belfast Canada is based on climate observations for 2026 year

Belfast air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	6.6	10.1	10.7	27.7	29.4	30.6	30.0	26.3	29.3	27.1	13.9	13.6
Average daytime temperature (°C)	1.3	2.3	4.1	13.4	19.1	23.9	24.8	22.9	21.6	14.7	6.4	5.2
Average temperature (°C)	-1.2	-2.4	-0.2	7.8	12.7	18.4	20.6	18.4	16.9	11.3	3.3	2.5
Average night temperature (°C)	-3.4	-5.9	-3.9	3.1	7.0	13.5	16.9	14.6	13.1	8.7	0.3	0.6
Absolute minimum temperature (°C)	-13.8	-18.7	-11.7	-5.7	0.3	8.0	13.1	8.5	6.4	1.0	-5.1	-4.6

Belfast monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	9.0
Daylight mean duration (h)	9.3	10.5	11.9	13.4	14.7	15.4	15.1	14.0	12.5	11.0	9.7	9.0
Daylight minimum duration (h)	8.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	9.0	8.0
Sunshine mean duration (h)	1.8	5.4	6.3	8.3	11.7	11.7	11.9	10.2	9.1	4.8	4.8	2.6
Precipitation (mm)	91	104	110	116	63	58	139	96	57	139	72	82
Sunny days	5	8	9	13	22	16	5	11	15	6	8	7
Rainy days	15	12	9	16	9	14	26	20	15	25	18	18
Snow days	11	8	13	1	0	0	0	0	0	0	4	6

Belfast - weather forecast by months

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Best time to visit Belfast:

The best time to visit Belfast during the most sunny months:

May — 11.7(h)
June — 11.7(h)
July — 11.9(h)
August — 10.2(h)

Months with the longest average daylight duration in Belfast:

June — 15.4(h)

The largest precipitation sum in Belfast is at

July — 139(mm)

October — 139(mm)

Weather forecast in the closest to Belfast admin centers