Roseau Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Roseau’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Dominica.
Monthly Temperature Averages
The temperature in Roseau changes very little across the seasons, maintaining a similar climate throughout the year. On average, maximum daytime temperatures range from a warm 29°C in September to a warm 27°C in February. Nighttime temperatures can drop, with averages reaching 24°C in February.
The chart below illustrates the average maximum day and minimum night temperatures in Roseau by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest. September, the city’s warmest month receives 212 hours of sunshine.
The chart below shows the average temperature throughout the year:
February, the city’s coldest month, receives about 41 mm of rainfall spread over roughly 14 days. For more information, please visit our Roseau Precipitation page.
Annual Temperatures in Dominica Compared
The map below shows the annual temperature across Dominica. You can also select the different months in case you are interested in a specific month.
very warm
warm
pleasant
moderate
cold
very cold
Roseau Temperatures Compared World Wide
Roseau’s average annual maximum temperature is 28°C. Let’s compare this with some popular tourist destinations:
In Barcelona, Spain, the average annual temperature is around 21°C, resulting in warm summers and mild winters throughout the year.
Interlaken, Switzerland, the average annual temperature is significantly lower at 8°C, with mild summers and very cold winters.
Osaka, Japan, offers a similar climate to Tokyo, with an average annual temperature of 22°C.
In Brisbane, Australia, the average annual temperature is 26°C, making it warmer than Sydney.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
In Roseau, during the coolest month, February, you will experience 67% humidity, which is considered high. This is accompanied by an average maximum temperature of 27°C. In the warmest month, September, the humidity is 72% combined with an average maximum temperature of 29°C, which creates a high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about Roseau’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Roseau climate page.
Current temperature in Roseau
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