Best year time to visit Castletown

General weather information about Castletown

Average annual temperature is 11.0 °C

Absolute maximum temperature: 24.4 °C

Absolute minimum temperature: -0.9 °C

Number of sunny days: 84 days

Number of rainy days: 281 days

Look at detailed online map of Castletown

* Weather data for Castletown Isle of Man is based on climate observations for 2026 year

Castletown air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	12.4	11.6	12.9	15.0	16.8	24.4	18.9	20.0	22.7	17.7	13.8	12.5
Average daytime temperature (°C)	8.4	9.0	8.4	10.5	13.8	18.5	16.2	16.7	17.2	13.7	10.3	9.6
Average temperature (°C)	7.0	7.8	6.7	8.4	11.5	15.7	14.5	15.0	15.3	12.2	8.8	8.3
Average night temperature (°C)	5.6	6.3	5.0	6.3	9.3	13.0	12.9	13.2	13.2	10.7	7.3	6.8
Absolute minimum temperature (°C)	1.0	2.5	-0.9	3.0	6.3	10.6	11.1	10.4	9.7	6.7	1.7	0.0

Castletown monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	8.0	10.0	12.0	15.0	16.0	17.0	17.0	15.0	13.0	11.0	9.0	7.0
Daylight mean duration (h)	8.0	9.8	11.9	14.1	16.0	17.1	16.5	14.8	12.7	10.5	8.6	7.5
Daylight minimum duration (h)	7.0	8.0	10.0	13.0	15.0	16.0	15.0	13.0	11.0	9.0	7.0	7.0
Sunshine mean duration (h)	4.0	5.5	5.6	9.7	11.9	12.6	10.0	10.2	7.3	5.0	4.5	2.3
Precipitation (mm)	109	36	157	91	43	52	173	107	159	140	126	194
Sunny days	5	12	2	10	13	13	5	3	8	4	7	2
Rainy days	26	16	29	20	18	17	26	28	22	27	23	29
Snow days	0	0	0	0	0	0	0	0	0	0	0	0

Castletown - weather forecast by months

Castletown weather in january Castletown weather in february Castletown weather in march Castletown weather in april Castletown weather in may Castletown weather in june Castletown weather in july Castletown weather in august Castletown weather in september Castletown weather in october Castletown weather in november Castletown weather in december

Best time to visit Castletown:

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

April — 9.7(h)
May — 11.9(h)
June — 12.6(h)
July — 10.0(h)
August — 10.2(h)

Months with the longest average daylight duration in Castletown:

May — 16.0(h)
June — 17.1(h)
July — 16.5(h)

The largest precipitation sum in Castletown is at

March — 157(mm)

July — 173(mm)

September — 159(mm)

December — 194(mm)

Weather forecast in the closest to Castletown admin centers