Everyday Climate Change in Castries
Saint Lucia · North America · Everyday climate impact
This page uses 50 years of real, daily weather data for Castries,Saint Lucia to show 20 everyday facts about how the climate here has changed: how much extra water your body loses standing in the shade, how many more evenings with terrace weather and sticky tropical nights the city gets each year, how much efficiency a rooftop solar panel loses on its hottest afternoons, and how much faster laundry dries and drinks go flat. Each fact compares two real periods fromCastries's own weather record, 1976 to 1986 against 2015 to 2025, so every number reflects this city's actual history rather than a global estimate.
Data through October 17, 2026.
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Frequently asked questions about Castries's climate
Is Christmas getting warmer in Castries?
The average high temperature during Christmas week, December 20 to 27, was 26.2°C in 1976 to 1986. In 2015 to 2025 that same week averaged 27.2°C. A rise of 1°C over the exact same week of the year.
How many tropical nights does Castries get now?
Castries averaged 365 nights a year that never cooled below 20°C in 2015 to 2025, about the same as 365 in 1976 to 1986. A night like that is the main reason sleep gets worse during a heatwave, the body can't cool down enough to reach deep sleep.
How long do heatwaves last in Castries now?
The longest unbroken run of exceptionally hot days now averages 16 days a year, up from 4 days in Castries's own early record. The threshold is Castries's own 95th percentile hot day from the 1976 to 1986 window, not a fixed number for every city, so this measures how the city's own definition of too hot has shifted, not just how often it crossed some fixed temperature.
Is the pavement too hot for dogs in Castries?
On 364 days a year now, the temperature passes 25°C, hot enough that asphalt or sand in full sun reaches roughly 52°C, the point vets say a dog's paw pads start to burn within about a minute. That's up from 355 days in the 1976 to 1986 window. The simple test, press the back of your hand to the pavement for seven seconds, if that's too hot for you, it's too hot for a dog.
How hot does a parked car get in Castries?
Castries now has 365 days a year warm enough, above 20°C, for a closed car in the sun to get hot enough to melt chocolate left on the seat, compared with 365 in the early record. A closed car reaches that point within about an hour, which is also why leaving a child or a pet alone in the car, even briefly, is dangerous on far more days than it used to be.
Are dry spells getting longer in Castries?
Barely, the longest dry stretch sits around 12 days a year in both windows. Longer dry spells matter for sprinkler bans and cracking in clay soil foundations.
Is insect season getting longer in Castries?
The warm season here, days averaging above 10°C, is now about 5.5% warmer than in 1976 to 1986. Under the Q10 rule from biology, insects and mosquito larvae develop roughly twice as fast for every 10°C of warming, so this difference translates into noticeably faster breeding cycles, one reason insect season starts earlier and runs longer than it used to.
