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March Weather in Portland, United Kingdom

Last updated: August 27, 2025

In March, the average temperature in Portland, United Kingdom hovers around 8°C (47°F). Expect minimums to dip to -2°C (29°F) and maximums reaching 13°C (56°F). With an average humidity of 86%, you may want to prepare for the 82 mm (3.2 in) of precipitation expected over 13 days.

March Temperature in Portland

In March in Portland, the average temperature is 8°C (47°F). Maximums can reach 13°C (56°F) and minimums can be as low as -2°C (29°F). Travelers should prepare for chilly weather and dress in layers to stay comfortable during their visit.

March Weather in Portland: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland, March typically has an average temperature of 8°C (47°F), with highs reaching up to 13°C (56°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec464647495358626261575148
Data source: Temperature data for Portland generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Portland

In Portland in March, the total precipitation amount is 82 mm (3.2 in), occurring over the course of 13 days.

March Precipitation Trends in Portland

The chart displays monthly precipitation patterns in Portland, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Portland, March typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec758382416874507758144108136
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Portland

In Portland in March, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

March Average Humidity in Portland

This chart illustrates the average monthly humidity levels in Portland, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Portland is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Portland

In Portland in March, 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 Portland for better planning.

Maximum UV Index Levels in Portland for March

The chart shows the monthly maximum UV Index (UVI) for Portland in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in Portland typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679876421
Data source: Portland March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How March Weather in Portland Compares to Other Months

Weather in Portland varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Portland, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Portland, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)74 mm (2.9 inches)88%low
February Weather8°C (46°F)83 mm (3.3 inches)88%moderate
March Weather8°C (47°F)82 mm (3.2 inches)86%moderate
April Weather9°C (49°F)41 mm (1.6 inches)84%high
May Weather12°C (54°F)68 mm (2.7 inches)80%high
June Weather15°C (59°F)74 mm (2.9 inches)80%very high
July Weather17°C (62°F)50 mm (2.0 inches)70%very high
August Weather17°C (63°F)77 mm (3.0 inches)73%high
September Weather16°C (61°F)58 mm (2.3 inches)79%high
October Weather14°C (57°F)144 mm (5.7 inches)89%moderate
November Weather11°C (51°F)107 mm (4.2 inches)90%low
December Weather9°C (49°F)136 mm (5.4 inches)89%low

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