Castries, Saint Lucia 14-Day Forecast
Saint Lucia 🇱🇨
82°
Patchy rain nearby right now
Today: high 84°, low 79°
Updated 2 min ago
Castries weather for the next 14 days
Wednesday, September 16
Patchy rain nearby High 85° Low 80°Precipitation
86%
· 0.51 in
Max wind
19 mph
Humidity
80%
UV index
12 - Extreme
Sunrise / sunset
05:52 AM / 06:04 PM
Thursday, September 17
Overcast High 84° Low 80°Precipitation
84%
· 0.3 in
Max wind
17 mph
Humidity
79%
UV index
10 - Very High
Sunrise / sunset
05:52 AM / 06:04 PM
Friday, September 18
Patchy rain nearby High 85° Low 80°Precipitation
36%
· 0.02 in
Max wind
14 mph
Humidity
75%
UV index
12 - Extreme
Sunrise / sunset
05:52 AM / 06:03 PM
Saturday, September 19
Patchy rain nearby High 86° Low 80°Precipitation
47%
· 0.02 in
Max wind
12 mph
Humidity
77%
UV index
12 - Extreme
Sunrise / sunset
05:53 AM / 06:02 PM
Sunday, September 20
Patchy rain nearby High 86° Low 80°Precipitation
63%
· 0.07 in
Max wind
14 mph
Humidity
79%
UV index
7 - High
Sunrise / sunset
05:53 AM / 06:01 PM
Monday, September 21
Patchy rain nearby High 85° Low 80°Precipitation
38%
· 0.02 in
Max wind
16 mph
Humidity
75%
UV index
7 - High
Sunrise / sunset
05:53 AM / 06:01 PM
Tuesday, September 22
Sunny High 85° Low 80°Precipitation
36%
· 0.02 in
Max wind
15 mph
Humidity
74%
UV index
7 - High
Sunrise / sunset
05:53 AM / 06:00 PM
Wednesday, September 23
Patchy rain nearby High 86° Low 79°Precipitation
30%
· 0.01 in
Max wind
14 mph
Humidity
76%
UV index
7 - High
Sunrise / sunset
05:53 AM / 05:59 PM
Thursday, September 24
Patchy rain nearby High 85° Low 80°Precipitation
60%
· 0.04 in
Max wind
16 mph
Humidity
77%
UV index
6 - High
Sunrise / sunset
05:53 AM / 05:58 PM
Friday, September 25
Patchy rain nearby High 85° Low 81°Precipitation
47%
· 0.03 in
Max wind
14 mph
Humidity
77%
UV index
6 - High
Sunrise / sunset
05:53 AM / 05:58 PM
Saturday, September 26
Patchy rain nearby High 85° Low 80°Precipitation
67%
· 0.1 in
Max wind
14 mph
Humidity
75%
UV index
7 - High
Sunrise / sunset
05:53 AM / 05:57 PM
Sunday, September 27
Patchy rain nearby High 86° Low 79°Precipitation
74%
· 0.11 in
Max wind
10 mph
Humidity
75%
UV index
6 - High
Sunrise / sunset
05:53 AM / 05:56 PM
Monday, September 28
Light rain shower High 81° Low 77°Precipitation
86%
· 0.33 in
Max wind
13 mph
Humidity
81%
UV index
6 - High
Sunrise / sunset
05:53 AM / 05:55 PM
Castries 14-day outlook: the story
The warmest day of Castries's 14-day outlook is Saturday, September 19 with a high near 86°F (30°C); the coolest night comes Monday, September 28, dipping to 77°F (25°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 85°F (29°C), right in line with the typical September high of 86°F (30°C).
Precipitation is most likely on Wednesday 16, Thursday 17, Sunday 20, Thursday 24 and beyond; the wettest day looks like Wednesday, September 16 with about 0.51 in (13.0 mm) expected. For the weekend, expect Saturday 86°F (30°C) and patchy rain nearby / Sunday 86°F (30°C) and patchy rain nearby.
For typical conditions month by month, see the Castries climate & average temperatures guide.
Castries forecast questions
Will it rain in Castries this week?
The forecast currently shows meaningful precipitation chances on 7 of the next 14 days, peaking around Wednesday, September 16.
What will be the warmest day in Castries over the next 14 days?
Saturday, September 19, with a forecast high near 86°F (30°C).
How accurate is a 14-day forecast for Castries?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Castries by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 81° | 73° | 18 | 2.2 in | 10.8 h/day | 76% |
| February | 81° | 73° | 13 | 1.8 in | 11.1 h/day | 74% |
| March | 82° | 73° | 15 | 1.9 in | 11.6 h/day | 74% |
| April | 84° | 74° | 12 | 1.5 in | 11.8 h/day | 73% |
| May | 85° | 76° | 13 | 1.9 in | 11.7 h/day | 74% |
| June | 85° | 76° | 19 | 3.3 in | 11.3 h/day | 77% |
| July | 84° | 76° | 24 | 4.6 in | 11.5 h/day | 80% |
| August | 85° | 76° | 23 | 4.2 in | 11.3 h/day | 80% |
| September | 86° | 77° | 22 | 4.5 in | 11.2 h/day | 80% |
| October | 85° | 76° | 21 | 3.9 in | 10.8 h/day | 80% |
| November | 83° | 75° | 21 | 4.4 in | 10.5 h/day | 80% |
| December | 82° | 74° | 17 | 2.2 in | 10.7 h/day | 77% |
14-day forecasts nearby