Portsmouth, Saint John, Dominica Climate

Weather: 26.69°C/80.04°F, Wind SW at 4.3 km/h, 70% Humidity, 0% Chance of rain

Dominica
(Photo by JJ Shev on Unsplash)
Contents

Portsmouth Climate Summary

Located at an elevation of 23.8 meters (78.08 feet) above sea level, Portsmouth has a Tropical rainforest climate (Classification: Af). The district’s yearly temperature is 28.22ºC (82.8ºF) and it is 0.91% higher than Dominica’s averages. Portsmouth typically receives about 58.94 millimeters (2.32 inches) of precipitation and has 152.04 rainy days (41.65% of the time) annually.

CountryDominica
CitySaint John
Longitude-61.45814
Latitude15.5561791
Attitude/Elevation23.8m (78.08ft)
Local timeSunday 02:22
Annual high temperature28.73ºC (83.71ºF)
Annual low temperature27.23ºC (81.01ºF)
Average annual precip.58.94mm (2.32in)
Warmest monthSeptember (30.01ºC / 86.02ºF)
Coldest MonthFebruary (25.43ºC / 77.77ºF)
Wettest MonthSeptember (88.53mm / 3.49in)
Driest MonthFebruary (26.5mm / 1.04in)
Number of days with rainfall (≥ 1.0 mm)152.04 days (41.65%)
Days with no rain212.96 days (58.35%)
Humidity78.14%

Climate Portsmouth: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)28.9(84.02)28.9(84.02)29.93(85.87)30.97(87.75)30.97(87.75)30.97(87.75)30.97(87.75)32.0(89.6)32.0(89.6)32.0(89.6)30.97(87.75)30.97(87.75)32.0(89.6)
Average high °C (°F)27.23(81.01)27.1(80.78)27.56(81.61)28.16(82.69)28.93(84.07)29.38(84.88)29.47(85.05)29.84(85.71)30.01(86.02)29.8(85.64)29.06(84.31)28.22(82.8)28.73(83.71)
Daily mean °C (°F)26.7(80.06)26.51(79.72)26.99(80.58)27.65(81.77)28.44(83.19)28.97(84.15)28.99(84.18)29.3(84.74)29.5(85.1)29.32(84.78)28.61(83.5)27.7(81.86)28.22(82.8)
Average low °C (°F)25.71(78.28)25.43(77.77)26.07(78.93)26.69(80.04)27.44(81.39)27.91(82.24)28.03(82.45)28.31(82.96)28.58(83.44)28.23(82.81)27.53(81.55)26.76(80.17)27.23(81.01)
Record low °C (°F)17.55(63.59)17.55(63.59)18.58(65.44)19.61(67.3)21.68(71.02)21.68(71.02)21.68(71.02)22.71(72.88)20.64(69.15)20.64(69.15)19.61(67.3)19.61(67.3)17.55(63.59)
Average precipitation mm (inches)35.84(1.41)26.5(1.04)27.99(1.1)49.65(1.95)64.42(2.54)41.56(1.64)70.44(2.77)88.01(3.46)88.53(3.49)86.96(3.42)78.88(3.11)48.47(1.91)58.94(2.32)
Average precipitation days (≥ 1.0 mm)8.838.547.7913.0513.69.9514.3616.3315.1117.2715.4811.7312.67
Average relative humidity (%)76.9376.7177.0578.0179.078.9779.2979.2577.9878.1378.7377.5378.14
Mean monthly sunshine hours9.1211.211.0112.4312.5312.412.4512.4312.1710.538.228.2711.07

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Portsmouth in recent years.

Portsmouth

Portsmouth Temperature by Month

September
29.5°C | 85.1°F
October
29.32°C | 84.78°F
August
29.3°C | 84.74°F
July
28.99°C | 84.18°F
June
28.97°C | 84.15°F
November
28.61°C | 83.5°F
May
28.44°C | 83.19°F
December
27.7°C | 81.86°F
April
27.65°C | 81.77°F
March
26.99°C | 80.58°F
January
26.7°C | 80.06°F
February
26.51°C | 79.72°F

Historical Data

Summary
  • 2010
  • 2011
  • 2012
  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature27.87°C (82.17°F)27.76°C (81.97°F)26.84°C (80.31°F)
Avg Temperature27.87°C (82.17°F)27.5°C (81.5°F)26.84°C (80.31°F)
Min Temperature27.87°C (82.17°F)27.13°C (80.83°F)26.84°C (80.31°F)
Dew PointMaxAverageMin
Dew Point23.74°C (74.73°F)22.86°C (73.15°F)21.68°C (71.02°F)
PrecipitationMaxAverageMinSum
Precipitation0.1mm | 0.0in0.0mm | 0in0.0mm | 0in0.1mm | 0.0in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind37.16kmh | 23.09mph21.23kmh | 13.19mph7.23kmh | 4.49mph
Gust Wind50.58kmh | 31.43mph29.45kmh | 18.3mph9.29kmh | 5.77mph
Sea Level PressureMaxAverageMin
Sea Level Pressure0.1mb0.0mb0.0mb
Portsmouth

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
February° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2010-02-0127.87 | 82.1721.68 | 71.027332.0 | 19.8830.94 | 1047.680.0 | 0
2010-02-0227.87 | 82.1722.71 | 72.887437.16 | 23.0930.91 | 1046.650.0 | 0
2010-02-0327.87 | 82.1722.71 | 72.887730.97 | 19.2430.91 | 1046.650.1 | 0.0
2010-02-0426.84 | 80.3122.71 | 72.887520.64 | 12.8330.91 | 1046.650.0 | 0
2010-02-0526.84 | 80.3121.68 | 71.027518.58 | 11.5530.91 | 1046.650.0 | 0
2010-02-0626.84 | 80.3122.71 | 72.887523.74 | 14.7530.88 | 1045.620.0 | 0
2010-02-0727.87 | 82.1722.71 | 72.887517.55 | 10.9130.88 | 1045.620.0 | 0
2010-02-0827.87 | 82.1723.74 | 74.737921.68 | 13.4730.91 | 1046.650.0 | 0
2010-02-0927.87 | 82.1723.74 | 74.738026.84 | 16.6830.91 | 1046.650.0 | 0
2010-02-1027.87 | 82.1722.71 | 72.887619.61 | 12.1930.85 | 1044.590.0 | 0
2010-02-1126.84 | 80.3121.68 | 71.027310.32 | 6.4130.85 | 1044.590.0 | 0
2010-02-1226.84 | 80.3121.68 | 71.027412.39 | 7.730.85 | 1044.590.0 | 0
2010-02-1326.84 | 80.3121.68 | 71.027322.71 | 14.1130.85 | 1044.590.0 | 0
2010-02-1427.87 | 82.1722.71 | 72.887723.74 | 14.7530.88 | 1045.620.0 | 0
2010-02-1527.87 | 82.1723.74 | 74.737928.9 | 17.9630.91 | 1046.650.0 | 0
2010-02-1627.87 | 82.1723.74 | 74.737729.93 | 18.630.91 | 1046.650.0 | 0
2010-02-1727.87 | 82.1723.74 | 74.737927.87 | 17.3230.88 | 1045.620.0 | 0
2010-02-1827.87 | 82.1723.74 | 74.737922.71 | 14.1130.91 | 1046.650.0 | 0
2010-02-1926.84 | 80.3122.71 | 72.887518.58 | 11.5530.94 | 1047.680.0 | 0
2010-02-2026.84 | 80.3121.68 | 71.027319.61 | 12.1930.94 | 1047.680.0 | 0
2010-02-2126.84 | 80.3122.71 | 72.887517.55 | 10.9130.91 | 1046.650.0 | 0
2010-02-2226.84 | 80.3121.68 | 71.027519.61 | 12.1930.88 | 1045.620.0 | 0
2010-02-2327.87 | 82.1722.71 | 72.887827.87 | 17.3230.82 | 1043.550.0 | 0
2010-02-2427.87 | 82.1723.74 | 74.738020.64 | 12.8330.85 | 1044.590.0 | 0
2010-02-2527.87 | 82.1723.74 | 74.73807.23 | 4.4930.85 | 1044.590.0 | 0
2010-02-2627.87 | 82.1723.74 | 74.73817.23 | 4.4930.85 | 1044.590.0 | 0
2010-02-2727.87 | 82.1723.74 | 74.738012.39 | 7.730.88 | 1045.620.0 | 0
2010-02-2827.87 | 82.1723.74 | 74.737916.52 | 10.2730.88 | 1045.620.0 | 0

Portsmouth 11 Year Historical Weather Data

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