Last updated: June 24, 2025
In April, the average temperature in Portsmouth, United States hovers around 8°C (46°F), with daily variations ranging from a chilly 0°C (32°F) to a mild 17°C (64°F). Be prepared for 147 mm (5.8 in) of precipitation over approximately 12 days, and expect the air to feel fairly humid with an average humidity level of 79%.
In April in Portsmouth, the average temperature is 8°C (46°F). Maximum temperatures can reach 17°C (64°F), while minimums may drop as low as 0°C (32°F). This mild climate makes Portsmouth a pleasant destination for travelers seeking cooler weather experiences.
In Portsmouth in April, the precipitation amount is 147 mm (5.8 in) over a span of 12 days.
In Portsmouth in April humidity is 79%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities a bit less enjoyable and leading travelers to seek cozy, warm spots to regain their comfort.
In Portsmouth in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 April’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 |