Average Monthly Sunshine in Castletown

The graphs on this page shows the average number of hours per month and per day that Castletown receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Sunshine in Castletown varies greatly throughout the year. The sunniest month, May, reaches an impressive 195 hours, while December, the darkest month, offers only 29 hours. The total annual amount of sun is 1234 hours.

Daily hours of sunshine

For those who appreciate different seasons, Castletown serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.5 hours of sunshine daily, and embrace the darker days in December, offering only 1.0 hours of daily sunlight.

Castletown’s total hours of sunshine compared to other major cities

Castletown enjoys an average of 1234 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

In contrast, Juneau, Alaska, receives only about 1523 hours of sunshine per year and is known for its very short days in winter and frequently overcast conditions.

The climate in San Francisco, USA, includes 3072 hours of sunshine annually, thanks to its mild coastal weather.

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

Other climate information

October, Castletown’s wettest month, receives 86 mm of rainfall and has a maximum daytime temperature of 13°C. During the driest month April you can expect a temperature of 11°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Castletown Precipitation page.