North America

Warmest month: May (27 °C in Castries)
Coldest: January (25 °C in Castries)
Rainiest: October (12.24 inch in Castries)
Driest: March (3.82 inch in Castries)

Details: Climate Charts and Best Time to Visit St. Lucia

Warmest month: July (28 °C in Kingstown)
Coldest: January (23 °C in Kingstown)
Rainiest: August (10.63 inch in Kingstown)
Driest: April (2.76 inch in Kingstown)

Details: Climate Charts and Best Time to Visit St. Vincent and The Grenadines

Warmest month: May (28 °C in St. George’s)
Coldest: January (26 °C in St. George’s)
Rainiest: August (11.54 inch in St. George’s)
Driest: April (0.64 inch in St. George’s)

Details: Climate Charts and Best Time to Visit Grenada

Warmest month: August (28 °C in Bridgetown)
Coldest: February (26 °C in Bridgetown)
Rainiest: October (7.29 inch in Bridgetown)
Driest: March (1.47 inch in Bridgetown)

Details: Climate Charts and Best Time to Visit Barbados

Warmest month: May (27 °C in Port of Spain)
Coldest: January (25 °C in Port of Spain)
Rainiest: July (10.47 inch in Port of Spain)
Driest: March (1.34 inch in Port of Spain)

Details: Climate Charts and Best Time to Visit Trinidad and Tobago