Last updated: June 24, 2025
In Portsmouth, United States, the average temperature in October hovers around 15°C (60°F). Expect a minimum of 3°C (37°F) and a maximum of 23°C (74°F). This month also brings an average precipitation of 169 mm (6.7 in) over 13 days, contributing to an average humidity of 75%. Stay prepared for variable weather conditions!
In October in Portsmouth, the average temperature is 15°C (60°F), with maximums reaching 23°C (74°F) and minimums dropping as low as 3°C (37°F). This pleasant and mild weather makes Portsmouth an ideal destination for travelers seeking comfortable temperatures and outdoor activities.
In Portsmouth in October, the total precipitation amount is 169 mm (6.7 in) over the course of 13 days, reflecting a moderate level of rainfall for that time of year.
In Portsmouth in October, humidity is 75%. With an average temperature of 15°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities slightly uncomfortable and requiring extra hydration while exploring the sights.
In Portsmouth in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Portsmouth, you can refer to this 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 October’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 |