Castries weather in March
In March, Castries sees average daytime highs of 28°C and overnight lows near 24°C, with 26 mm of rain across 9.8 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 45% of the time in March, and the air most often feels muggy.
Daylight stretches from about 11 h 42 min at the start of March to 12 h 06 min by month's end. Set against the rest of the year, March is Castries's 4th-clearest and 5th-windiest month. For the whole year in context, see Castries's year-round climate.
- Daytime high
- 28°
- 10th warmest
- Overnight low
- 24°
- 3rd coldest
- Rainfall
- 26 mm
- 9.8 wet days
- Daylight
- 11 h 54 min
- 6:17 AM – 6:11 PM
- Cloud cover
- 47%
- 4th clearest
- Wind
- 21 km/h
- 5th windiest
- Solar energy
- 6.41 kWh/m²
- Travel score
- 6.1
- out of 10
Castries is capital of Saint Lucia.
- Density
- 253/km²
- people per km²
- Founded
- 1650
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Day-to-day highs hold fairly steady near 28°C through the month.
A typical March day in Castries reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, March runs on par with February and on par with April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 24 |
| 2 | 28 | 24 |
| 3 | 28 | 24 |
| 4 | 28 | 24 |
| 5 | 28 | 24 |
| 6 | 28 | 24 |
| 7 | 28 | 24 |
| 8 | 28 | 24 |
| 9 | 28 | 24 |
| 10 | 28 | 24 |
| 11 | 28 | 24 |
| 12 | 28 | 24 |
| 13 | 28 | 24 |
| 14 | 28 | 24 |
| 15 | 28 | 24 |
| 16 | 28 | 24 |
| 17 | 28 | 24 |
| 18 | 28 | 24 |
| 19 | 28 | 24 |
| 20 | 28 | 24 |
| 21 | 28 | 24 |
| 22 | 28 | 24 |
| 23 | 28 | 24 |
| 24 | 28 | 24 |
| 25 | 28 | 24 |
| 26 | 28 | 24 |
| 27 | 28 | 24 |
| 28 | 28 | 24 |
| 29 | 28 | 24 |
| 30 | 29 | 24 |
| 31 | 29 | 24 |
How March really feels in Castries
Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Castries weather by month
How March compares with the rest of the year at a glance. March is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 24° | 31 | 11.8 | 11.3 | 6.5 |
| Feb | 28° / 24° | 21 | 8.8 | 11.5 | 6.7 |
| Mar | 28° / 24° | 26 | 9.8 | 11.9 | 6.1 |
| Apr | 29° / 25° | 36 | 11.5 | 12.3 | 5.4 |
| May | 29° / 25° | 47 | 12.5 | 12.6 | 4.9 |
| Jun | 29° / 25° | 65 | 15.1 | 12.8 | 4.5 |
| Jul | 29° / 25° | 83 | 20.3 | 12.7 | 4.2 |
| Aug | 30° / 26° | 99 | 20.7 | 12.5 | 4.0 |
| Sep | 30° / 26° | 104 | 19.4 | 12.1 | 3.9 |
| Oct | 29° / 25° | 119 | 20.9 | 11.7 | 4.0 |
| Nov | 29° / 25° | 102 | 18.9 | 11.4 | 4.5 |
| Dec | 28° / 25° | 42 | 13 | 11.2 | 5.7 |
Cloud cover in March
The sky is clear or mostly clear about 45% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 29% of March, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 79 | 79 | 79 | 78 | 78 | 78 | 77 | 77 | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 72 | 72 | 71 | 71 | 69 | 69 | 67 | 67 | 66 | 65 |
| Cloudier (%) | 21 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 28 | 28 | 29 | 29 | 31 | 31 | 33 | 33 | 34 | 35 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 79 | 21 |
| 2 | 79 | 21 |
| 3 | 79 | 21 |
| 4 | 78 | 22 |
| 5 | 78 | 22 |
| 6 | 78 | 22 |
| 7 | 77 | 23 |
| 8 | 77 | 23 |
| 9 | 78 | 22 |
| 10 | 78 | 22 |
| 11 | 77 | 23 |
| 12 | 77 | 23 |
| 13 | 77 | 23 |
| 14 | 76 | 24 |
| 15 | 76 | 24 |
| 16 | 76 | 24 |
| 17 | 75 | 25 |
| 18 | 75 | 25 |
| 19 | 75 | 25 |
| 20 | 74 | 26 |
| 21 | 74 | 26 |
| 22 | 72 | 28 |
| 23 | 72 | 28 |
| 24 | 71 | 29 |
| 25 | 71 | 29 |
| 26 | 69 | 31 |
| 27 | 69 | 31 |
| 28 | 67 | 33 |
| 29 | 67 | 33 |
| 30 | 66 | 34 |
| 31 | 65 | 35 |
Chance of precipitation in March
Castries gets around 26 mm of rain over 9.8 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 32% and peaks near 36% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 32 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 36 |
| Rain chance (%) | |
|---|---|
| 1 | 32 |
| 2 | 31 |
| 3 | 31 |
| 4 | 30 |
| 5 | 30 |
| 6 | 30 |
| 7 | 30 |
| 8 | 30 |
| 9 | 30 |
| 10 | 30 |
| 11 | 30 |
| 12 | 30 |
| 13 | 30 |
| 14 | 30 |
| 15 | 30 |
| 16 | 30 |
| 17 | 31 |
| 18 | 31 |
| 19 | 31 |
| 20 | 32 |
| 21 | 32 |
| 22 | 32 |
| 23 | 33 |
| 24 | 33 |
| 25 | 33 |
| 26 | 34 |
| 27 | 34 |
| 28 | 35 |
| 29 | 35 |
| 30 | 35 |
| 31 | 36 |
Humidity in March
Most of March feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the muggy band about 74% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 |
| Muggy (%) | 77 | 76 | 77 | 77 | 76 | 75 | 75 | 75 | 75 | 76 | 75 | 75 | 74 | 74 | 74 | 75 | 74 | 74 | 75 | 74 | 74 | 74 | 74 | 73 | 73 | 71 | 71 | 70 | 68 | 68 | 67 |
| Oppressive (%) | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 25 | 26 | 27 | 29 | 30 | 31 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 0 | 13 | 77 | 10 |
| 2 | 0 | 13 | 76 | 11 |
| 3 | 0 | 12 | 77 | 11 |
| 4 | 0 | 12 | 77 | 11 |
| 5 | 1 | 12 | 76 | 11 |
| 6 | 1 | 12 | 75 | 12 |
| 7 | 1 | 12 | 75 | 12 |
| 8 | 1 | 12 | 75 | 12 |
| 9 | 1 | 12 | 75 | 12 |
| 10 | 1 | 11 | 76 | 12 |
| 11 | 1 | 11 | 75 | 13 |
| 12 | 1 | 11 | 75 | 13 |
| 13 | 1 | 11 | 74 | 14 |
| 14 | 1 | 11 | 74 | 14 |
| 15 | 0 | 11 | 74 | 15 |
| 16 | 0 | 10 | 75 | 15 |
| 17 | 0 | 10 | 74 | 16 |
| 18 | 0 | 9 | 74 | 17 |
| 19 | 0 | 8 | 75 | 17 |
| 20 | 0 | 8 | 74 | 18 |
| 21 | 0 | 7 | 74 | 19 |
| 22 | 0 | 6 | 74 | 20 |
| 23 | 0 | 5 | 74 | 21 |
| 24 | 0 | 5 | 73 | 22 |
| 25 | 0 | 4 | 73 | 23 |
| 26 | 0 | 4 | 71 | 25 |
| 27 | 0 | 3 | 71 | 26 |
| 28 | 0 | 3 | 70 | 27 |
| 29 | 0 | 3 | 68 | 29 |
| 30 | 0 | 2 | 68 | 30 |
| 31 | 0 | 2 | 67 | 31 |
Wind in March
Winds average 21 km/h in March.
Across March, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 22 | breezy |
| 2 | 22 | breezy |
| 3 | 22 | breezy |
| 4 | 22 | breezy |
| 5 | 22 | breezy |
| 6 | 22 | breezy |
| 7 | 22 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 21 | breezy |
| 11 | 21 | breezy |
| 12 | 21 | breezy |
| 13 | 21 | breezy |
| 14 | 21 | breezy |
| 15 | 21 | breezy |
| 16 | 21 | breezy |
| 17 | 21 | breezy |
| 18 | 21 | breezy |
| 19 | 21 | breezy |
| 20 | 21 | breezy |
| 21 | 21 | breezy |
| 22 | 21 | breezy |
| 23 | 20 | breezy |
| 24 | 20 | breezy |
| 25 | 20 | breezy |
| 26 | 20 | breezy |
| 27 | 20 | breezy |
| 28 | 20 | breezy |
| 29 | 20 | breezy |
| 30 | 20 | breezy |
| 31 | 20 | breezy |
Sunrise & sunset in March
Daylight runs from about 11 h 42 min at the start of March to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over March. Sunrise moves from 6:26 AM to 6:06 AM, and sunset from 6:08 PM to 6:12 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:26 | 6:25 | 6:25 | 6:24 | 6:24 | 6:23 | 6:23 | 6:22 | 6:21 | 6:21 | 6:20 | 6:19 | 6:19 | 6:18 | 6:17 | 6:17 | 6:16 | 6:15 | 6:15 | 6:14 | 6:13 | 6:12 | 6:12 | 6:11 | 6:10 | 6:09 | 6:09 | 6:08 | 6:07 | 6:07 | 6:06 |
| Sunset (PM) | 6:08 | 6:09 | 6:09 | 6:09 | 6:09 | 6:09 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:12 | 6:12 | 6:12 | 6:12 | 6:12 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:26 | 6:08 |
| 2 | 11.7 | 6:25 | 6:09 |
| 3 | 11.7 | 6:25 | 6:09 |
| 4 | 11.7 | 6:24 | 6:09 |
| 5 | 11.8 | 6:24 | 6:09 |
| 6 | 11.8 | 6:23 | 6:09 |
| 7 | 11.8 | 6:23 | 6:10 |
| 8 | 11.8 | 6:22 | 6:10 |
| 9 | 11.8 | 6:21 | 6:10 |
| 10 | 11.8 | 6:21 | 6:10 |
| 11 | 11.8 | 6:20 | 6:10 |
| 12 | 11.8 | 6:19 | 6:10 |
| 13 | 11.9 | 6:19 | 6:10 |
| 14 | 11.9 | 6:18 | 6:11 |
| 15 | 11.9 | 6:17 | 6:11 |
| 16 | 11.9 | 6:17 | 6:11 |
| 17 | 11.9 | 6:16 | 6:11 |
| 18 | 11.9 | 6:15 | 6:11 |
| 19 | 11.9 | 6:15 | 6:11 |
| 20 | 12.0 | 6:14 | 6:11 |
| 21 | 12.0 | 6:13 | 6:11 |
| 22 | 12.0 | 6:12 | 6:11 |
| 23 | 12.0 | 6:12 | 6:11 |
| 24 | 12.0 | 6:11 | 6:12 |
| 25 | 12.0 | 6:10 | 6:12 |
| 26 | 12.0 | 6:09 | 6:12 |
| 27 | 12.1 | 6:09 | 6:12 |
| 28 | 12.1 | 6:08 | 6:12 |
| 29 | 12.1 | 6:07 | 6:12 |
| 30 | 12.1 | 6:07 | 6:12 |
| 31 | 12.1 | 6:06 | 6:12 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 6.41 kWh/m².
For context, solar energy here swings from a low near 4.95 kWh/m² to a high of 6.65 kWh/m² in April across the year — March's 6.41 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.2 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.3 | Intense |
| 7 | 6.3 | Intense |
| 8 | 6.3 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.4 | Intense |
| 13 | 6.4 | Intense |
| 14 | 6.4 | Intense |
| 15 | 6.4 | Intense |
| 16 | 6.4 | Intense |
| 17 | 6.4 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Hazard calendar for Castries
None of Castries's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Castries sits in the Atlantic hurricane belt; the season peaks August–October.
Castries's rainy season runs June–November, when most of the year's rain falls.
Castries sees seasonal dust haze (June–July), heaviest in June.
Is March a good time to visit Castries?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a reasonable time to visit Castries for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Castries in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Castries sees daytime highs around 28°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear and a windbreaker. About 10 days see rain.
Sea temperature near Castries in March
The nearest coast averages about 27°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in September at about 29°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Castries in March
Clear-sky midday UV in March peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Castries peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 12 | 14 | 13 | 12 | 11 | 12 | 11 | 12 | 11 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Castries in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Castries is worst in June — around 29 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 14 | 12 | 16 | 19 | 29 | 25 | 21 | 15 | 18 | 13 | 10 |
| Level | Good | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 14 | Moderate |
| Mar | 12 | Good |
| Apr | 16 | Moderate |
| May | 19 | Moderate |
| Jun | 29 | Moderate |
| Jul | 25 | Moderate |
| Aug | 21 | Moderate |
| Sep | 15 | Moderate |
| Oct | 18 | Moderate |
| Nov | 13 | Moderate |
| Dec | 10 | Good |
Where is Castries?
Castries sits at 14.0°N, 61.0°W, 119 m above sea level, in Saint Lucia. The nearest listed city is Gros Islet, 10 km away.
Topography around Castries
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castries.
Within 3 km, the terrain around Castries has significant variations in elevation — a maximum elevation change of 266 m around an average of 45 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 900 m; within 80 km, large variations in elevation — a maximum elevation change of 1,191 m.
The land around Castries is covered by trees (46%) and water (35%) within 3 km, water (55%) and trees (42%) within 16 km, and water (89%) within 80 km.
Saint Lucia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / G
- 240 V · 50 Hz
- Prices
- ≈ 51% of US
- price level, 2025
- GDP per capita
- $14,746
- 2025
- Homicide rate
- 39
- per 100k, 2023
- Road deaths
- 29.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Castries (13.9957°, -61.0061°, elevation 119 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).