Castletown Temperature by Month
Castletown, Highlands, United Kingdom has an average annual maximum temperature of 12°C (54°F), with moderate seasonal shifts ranging from 8°C (46°F) in February to 17°C (63°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Castletown Monthly Temperatures
Seasonal changes in Castletown bring a little variety without extreme temperature swings. Nighttime lows range from 12°C (54°F) in August to 4°C (39°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Castletown by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 133 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Castletown vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
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Castletown vs World: Temperature Compared
Castletown's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Castletown's weather — including monthly rainfall, sunshine hours, and humidity — visit our Castletown climate page.
