Last updated: June 24, 2025
In Portsmouth Heights, United States, the average temperature in January hovers around 6°C (43°F). While temperatures can dip as low as -15°C (5°F), they can also rise to a maximum of 23°C (74°F). Expect about 90 mm (3.5 in) of precipitation scattered over 8 days, contributing to an average humidity of 84%.
In January in Portsmouth Heights, the average temperature is 6°C (43°F), with maximums reaching up to 23°C (74°F) and minimums dropping as low as -15°C (5°F). This wide temperature range means travelers should pack accordingly to enjoy both the warmer days and colder nights.
In Portsmouth Heights in January, the precipitation amount is 90 mm (3.5 in) spread over 8 days, indicating a relatively wet period for the region.
In Portsmouth Heights in January, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.
In Portsmouth Heights in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Portsmouth Heights for better planning.
UV Risk Categories
Weather in Portsmouth Heights varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Portsmouth Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 90 mm (3.5 inches) | 84% | moderate |
| February Weather | 8°C (47°F) | 99 mm (3.9 inches) | 83% | high |
| March Weather | 10°C (51°F) | 79 mm (3.1 inches) | 82% | very high |
| April Weather | 16°C (60°F) | 97 mm (3.8 inches) | 81% | very high |
| May Weather | 20°C (69°F) | 121 mm (4.7 inches) | 80% | very high |
| June Weather | 24°C (76°F) | 121 mm (4.8 inches) | 82% | very high |
| July Weather | 27°C (81°F) | 142 mm (5.6 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 169 mm (6.6 inches) | 81% | very high |
| September Weather | 24°C (75°F) | 127 mm (5.0 inches) | 78% | very high |
| October Weather | 19°C (66°F) | 91 mm (3.6 inches) | 80% | very high |
| November Weather | 11°C (53°F) | 78 mm (3.1 inches) | 84% | moderate |
| December Weather | 8°C (47°F) | 89 mm (3.5 inches) | 84% | moderate |