The Commonwealth of Dominica is 48 km long and 24 km wide, with an area of 754 square kilometers. It is located between 15o12 and 15o39 N Latitude and 61o14 and 61o29 W Longitude. Dominica is an English-speaking island situated in the Eastern Caribbean between the two French speaking islands of Guadeloupe and Martinique.

Dominica's location and size makes it vulnerable to features of the Tropical Atlantic. These include the annual migration of the North Atlantic Subtropical High, the spreading of the Tropical Atlantic warm pool, the Easterly Trade Winds, tropical waves, depressions, storms and hurricanes. This results in Dominica being classified as having a Marine Tropical Climate, with very little seasonal variation. The island is very rugged with many of its mountain ranges located along its center.

Types of Climate Data

The Dominica Meteorological Service maintains an archive of meteorological data recorded at the Canefield and Douglas-Charles Airports.

The archive is made up of daily and monthly climatological data from the observations of:

  • atmospheric pressure
  • cloud coverage
  • rainfall
  • relative humidity
  • sunshine hours
  • temperature
  • wind speed and direction

Records for Douglas-Charles Airport are available from October 1968 for rainfall data and 1974 for other elements. Records for Canefield Airport are available from 1982. All records are stored electronically for easy access.

Request Climate/Meteorological Data

To request Climate/Meteorological Data, see Procedures and Fees for Climate Data.

Rainfall and Temperature

The Douglas-Charles Airport is located along the windward side (north east coast) and the Canefield Airport is located along the leeward side (south west coast) of the island. Due to their differences in location, the weather conditions experienced at the two stations on any given day can vary significantly. The weather pattern at Douglas-Charles is greatly influenced by moisture being driven by the Trade Winds across the Atlantic Ocean. Canefield is on the lee side of the island where it is sheltered from the direct effects of the Trade Winds, thus the reason for the much drier and warmer conditions that are observed at Canefield.

Moisture drifting with the Trade Winds across the Atlantic Ocean interacts with the topography and accounts for the abundance of the orographic rainfall the island receives year round.

The 'dry season' usually runs from December to May and the 'wet season' from June to November. May and December are considered to be transition months.

Climatological Averages

Note: Douglas-Charles Airport: 1981-2010 and Canefield Airport: 1982-2011

Table 1: 30yrs Climatological Averages
Parameters Douglas-Charles Airport Canefield Airport
Annual average rainfall total 2652.7mm / 104.44in 1759.8mm/ 69.28in
Wettest month November (348.6mm / 13.72in) September (253.7/9.99in)
Driest month February (97.5mm/ 3.84in) March (49.0mm/1.93)
Annual average temperature 27.5oC / 82oF 27.9oC/ 82oF
Warmest month August (28.8oC/ 84oF) June (29.0oC/ 84oF)
Coolest month February (25.9oC/ 79oF) January & February (26.4oC/ 79oF )
Average Relative Humidity 76% 71%
Average Wind East south east (110o) @7kts South east(130o) @ 6kts
Average Atmospheric Pressure 1015.0mb/ 29.97inHg 1014.6mb/ 29.96inHg

 

Figure 1: 30yrs Climatological Rainfall Averages
Figure 1: 30yrs Climatological Rainfall Averages
Figure 2: Annual Average Rainfall at the Canefield Airport
Figure 2: Annual Average Rainfall at the Canefield Airport
 
Figure 3: Annual Average Rainfall at the Douglas-Charles Airport
Figure 3: Annual Average Rainfall at the Douglas-Charles Airport
Figure 4: 30yrs Climatological Temperature Averages
Figure 4: 30yrs Climatological Temperature Averages
 
Figure 5: Maximum temperatures recorded at the Canefield Airport
Figure 5: Maximum temperatures recorded at the Canefield Airport
Figure 6: Minimum temperatures recorded at the Canefield Airport
Figure 6: Minimum temperatures recorded at the Canefield Airport
 
Figure 7: Maximum temperatures recorded at the Douglas-Charles Airport
Figure 7: Maximum temperatures recorded at the Douglas-Charles Airport
Figure 8: Minimum temperatures recorded at the Douglas-Charles Airport
Figure 8: Minimum temperatures recorded at the Douglas-Charles Airport