Last updated: June 24, 2025
In August, the average temperature in Portsmouth, United States is a pleasant 22°C (73°F). Expect a comfortable range with minimum temperatures dipping to 16°C (61°F) and maximum highs reaching 28°C (83°F). You might want to prepare for some rain, as the area sees about 89 mm (3.5 in) of precipitation over approximately 10 days. With an average humidity of 76%, it’s the perfect time to explore the charming atmosphere of your destination!
In August in Portsmouth, the average temperature is 22°C (73°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 16°C (61°F). This pleasant weather makes it an ideal time for traveling and outdoor adventures.
In Portsmouth in August, the precipitation amount is 89 mm (3.5 in) over a period of 10 days.
In Portsmouth in August, humidity is 76%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace that envelops you, making travel both refreshing and slightly steamy, as the air clings warmly to your skin.
In Portsmouth in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Portsmouth.
UV Risk Categories
Weather in Portsmouth varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Portsmouth, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 1°C (35°F) | 95 mm (3.8 inches) | 84% | moderate |
February Weather | 2°C (36°F) | 121 mm (4.8 inches) | 84% | moderate |
March Weather | 3°C (39°F) | 119 mm (4.7 inches) | 82% | high |
April Weather | 8°C (46°F) | 147 mm (5.8 inches) | 79% | very high |
May Weather | 12°C (55°F) | 132 mm (5.2 inches) | 75% | very high |
June Weather | 18°C (64°F) | 104 mm (4.1 inches) | 78% | very high |
July Weather | 22°C (72°F) | 104 mm (4.1 inches) | 76% | very high |
August Weather | 22°C (73°F) | 89 mm (3.5 inches) | 76% | very high |
September Weather | 20°C (67°F) | 110 mm (4.3 inches) | 75% | very high |
October Weather | 15°C (60°F) | 169 mm (6.7 inches) | 75% | high |
November Weather | 9°C (48°F) | 117 mm (4.6 inches) | 80% | moderate |
December Weather | 4°C (39°F) | 147 mm (5.8 inches) | 80% | low |