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Portsmouth Weather in July
In Portsmouth, July brings high daytime temperatures around 29°C (84°F), with nights cooling to 26°C (79°F). Expect quite a bit of rainfall this month.
Rainfall in Portsmouth in July
Typically, you can expect about 20 days of rain this month, with 97 mm (3.8 in) on average. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Portsmouth in July
The temperature in Portsmouth in July is excellent. Daytime highs reach 29°C (84°F), with nights dropping to 26°C (79°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 26°C (79°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Portsmouth in July
The month enjoys around 231 hours of sunshine, creating mostly sunny days with good weather conditions.If you're a fan of comfortable temperatures and drier conditions, July is a great time to visit.
Portsmouth Temperature in July
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
67%
Precipitation
97 mm (3.8 in)
Rainy days
20 days
Humidity
73% *
Sunshine
231 hours *
Percentage Sunshine
*
* Data from: Douglas-Charles Airport, Dominica (18 KM, 11 Miles).
Portsmouth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portsmouth - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Portsmouth typically stay consistent throughout July, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in July
Historical weather records for Portsmouth in July
Browse day-by-day weather records for Portsmouth spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Portsmouth historical weather extremes in July
The extremes listed below come from historical weather data collected in Portsmouth from 1991 through 2026.
- On July 27, 2002, temperatures climbed to 37°C (99°F), marking the warmest July day on record.
- The coldest July day was on July 29, 2001, with a maximum of 26°C (79°F).
- Nighttime temperatures dropped to 13°C (55°F) on July 27, 2024, marking the coldest July night on record.
Best Places in Dominica in July
Find out more about the weather in Dominica and which places have the best travel conditions in this month. See all of Dominica in July →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Portsmouth in July
Warm temperatures in July make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Portsmouth in July
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Portsmouth 3-Day Forecast
More climate data for Portsmouth
Temperature Rainfall Sunshine Humidity
See the full Portsmouth climate overview or explore weather in Dominica.
Popular in July
Where to go in July - average daytime high across popular destinations.
Salisbury
29°C (84°F) Castle Bruce
28°C (82°F) Scotts Head Village29°C (84°F) Pont Cassé29°C (84°F) Marigot29°C (84°F) Portsmouth29°C (84°F) Calibishie29°C (84°F) Roseau29°C (84°F) Bucket list
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