Portsmouth Weather in June
June in Portsmouth brings high temperatures, with highs of 23°C (73°F) and nights dropping to 13°C (55°F). It's the rainiest month of the year, so come prepared with waterproof gear.
Rainfall in Portsmouth in June
With this being the rainiest month, having an umbrella is essential to avoid unexpected rain. You can typically expect 14 days of rain this month, averaging around 139 mm (5.5 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Portsmouth in June
In June, Portsmouth sees high temperatures, with highs of 23°C (73°F). Nights drop to around 13°C (55°F). The summer season is characteristic of June. This kind of day-to-night contrast is typical for this time of year. Nights drop to around 13°C (55°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Portsmouth in June
Expect a lot of sunshine this month, with about 274 hours of sun. These sunny conditions add to the overall experience.Our weather planner can help you find worldwide destinations with pleasant weather during this period. September typically offers the best weather for Portsmouth.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portsmouth's climate page.
Portsmouth Temperature in June
Min Temperature
13°C (55°F)
Max Temperature
23°C (73°F)
Chance of Rain
48%
Precipitation
139 mm (5.5 in)
Rainy days
14 days
Humidity
71% *
Sunshine
274 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Portsmouth typically rise from around 22°C (72°F) at the start of June to approximately 27°C (81°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 16°C (61°F).
Average temperatures in June
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Historical weather for Portsmouth in June
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 June
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Portsmouth.
- Portsmouth recorded its highest June temperature of 38°C (100°F) on June 24, 2025.
- On June 2, 2015, Portsmouth saw its coldest June day with temperatures maxing out at 9°C (48°F).
- Nighttime temperatures dropped to 1°C (34°F) on June 12, 1980, marking the coldest June night on record.
- The wettest June day on record brought 78 mm (3.1 in) of precipitation to Portsmouth (June 13, 1998).
Best Places in the United States of America in June
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in June →
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What to Wear in Portsmouth in June
Comfortable temperatures call for an easy wardrobe in June. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Portsmouth in June
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portsmouth's climate page.
Temperature Rainfall Sunshine Humidity
See the full Portsmouth climate overview or explore weather in the United States of America.
