26 to 29°C
temperature
3291 hours
sunshine per day
573 mm
rain
140 days
dry
225 days
rain
0 days
snow

Climate of Portsmouth

Portsmouth has a tropical rainforest climate. It is usually (very) warm, humid and rainy all year round. The average annual temperature for Portsmouth is 28° degrees and there is about 569 mm of rain in a year. It is dry for 77 days a year with an average humidity of 76% and an UV-index of 7.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between 26°C and 29°C
  • Night:the average nighttime temperature is between 25°C and 28°C
  • Sea temperature: the sea temperature is between 27°C and 30°C
  • Rain: it rains 225 days and there is a total of approximately 573 mm rainfall
  • Sun hours: throughout the year there are 3291 sun hours
Maximum temperature: between 26°C and 29°C
Warmest month: 29°C in June
Coldest month: 26°C in January
Night temperature: between 25°C and 28°C
Sea temperature: between 27°C and 30°C
Dry days: 140 days
Days with rain: 225 days
Days with snow: 0 days
Total rain sum: 573 mm
Hours of sunshine: 3291 hours

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Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Portsmouth.

Precipitation graph

This graph shows the average amount of rainfall per month for Portsmouth.

Climate table of Portsmouth

In this climate table you can see at a glance what the average weather per month is for Portsmouth. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Portsmouth might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) 26 26 27 27 28 29 29 29 29 29 28 27
Night temp. (°C) 25 25 25 26 27 28 28 28 28 27 27 26
Water temp. (°C) 28 27 28 28 30 30 30 30 30 30 29 29
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 28 19 19 44 59 29 50 68 79 77 68 33
Days with rain 18 16 15 20 21 16 20 19 19 21 20 20
Dry days 13 12 16 10 10 14 11 12 11 10 10 11
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 7 9 9 10 10 10 10 11 10 8 7 7
Wind force (Bft) 4 4 4 4 4 4 4 4 4 4 4 4
UV-index 7 7 7 7 7 7 7 7 7 7 7 7

Best time to visit Portsmouth

The best time to visit Portsmouth on Dominica is from January through December. In this period you have a warm temperature and little precipitation. The highest average temperature in Portsmouth is 29°C in June and the lowest is 26°C in January. The highest water temperature is 30°C and at its coldest the water is 27°C.

Climate of Portsmouth by month

What is the average climate in a given month for Portsmouth? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

Portsmouth weather experiences

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