The best times to visit Castries for ideal weather are
February 26th to April 1st
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Castries Travel Guide
Other Castries Travel Info
Weather in Castries
Average temperatures in Castries vary barely at all. Considering humidity, temperatures feel hot all year with a chance of rain throughout most of the year. The area is far less temperate than some — in the bottom 1 percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Castries, the hottest months are September, October, and then June. See average monthly temperatures below. The warmest time of year is generally early September where highs are regularly around 89.8°F (32.1°C) with temperatures rarely dropping below 76.8°F (24.9°C) at night.
Castries Temperatures (Fahrenheit)
Castries Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Castries Perceived Temperature (F)
Castries Perceived Temperature (C)
Average Castries Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Castries are March, February, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early March. For example, on the week of March 5th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late October to early November with an average of 4 days of significant precipitation the week of October 29th.
When can you find snow in Castries? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Castries.
Snow on the Ground
The graph below shows the average snow on the ground in Castries (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Castries has some very humid months, and above average humidity throughout the year. The least humid month is March (65.4% relative humidity), and the most humid month is November (73.2%).
Wind in Castries is usually moderate. The windiest month is June, followed by February and January. June’s average wind speed of around 9.3 knots (10.8 MPH or 17.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late June where average top sustained speeds reach 14.7 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Castries.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||9||Gentle breeze||13.5||Significant breeze|
|Feb||9.3||Gentle breeze||13.8||Significant breeze|
|Mar||8.7||Gentle breeze||13.2||Significant breeze|
|Apr||8.6||Gentle breeze||12.8||Significant breeze|
|May||8.9||Gentle breeze||13.7||Significant breeze|
|Jun||9.3||Gentle breeze||14.3||Significant breeze|
|Jul||8.8||Gentle breeze||13.3||Significant breeze|
|Aug||7.2||Gentle breeze||11.9||Significant breeze|
|Sep||6.2||Light breeze||10.7||Significant breeze|
|Oct||6.5||Light breeze||11.2||Significant breeze|
|Nov||7||Gentle breeze||11.7||Significant breeze|
|Dec||7.8||Gentle breeze||12.2||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Castries?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Saint Lucia; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 27, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Castries, St Lucia is January, followed by February and March. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Castries in October. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Castries Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 88.6°F (31.4°C) and 85°F (29.4°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 9 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 10 to 15 days of precipitation per month. June – August is the second busiest season for tourism in Castries, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 89.8°F (32.1°C) and 86.1°F (30.1°C), which will feel very nice given the humidity and wind. It rains or snows a great amount: 11 to 15 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in Castries to be enjoyable for warm weather travelers. The average high during this season is between 86.1°F (30.1°C) and 84.2°F (29°C). On average, it rains or snows a fair amount: 7 to 11 times per month. These times of year are the busiest with tourists.