March Weather in Northwest, United States

Last updated: June 24, 2025

In March, the average temperature in Northwest, United States is a pleasant 13°C (56°F). However, temperatures can vary widely, with a minimum of -5°C (23°F) and reaching up to a maximum of 29°C (85°F). Expect about 70 mm (2.8 in) of precipitation over 9 days, and with an average humidity of 81%, it’s wise to be prepared for a mix of weather conditions!

March Temperature in Northwest

In March in Northwest, the average temperature is 13°C (56°F). Maximum temperatures can reach up to 29°C (85°F), while minimums can drop as low as -5°C (23°F). This makes Northwest a destination with a wide range of temperatures, so travelers should be prepared for both warm and cool conditions.

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

The chart illustrates March temperature patterns in Northwest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Northwest, March typically has an average temperature of 13°C (56°F), with highs reaching up to 29°C (85°F) and lows dropping to around -5°C (23°F).

Data source: Temperature data for Northwest generated using information from the Copernicus Climate Change Service.

March Precipitation in Northwest

In Northwest in March, the total precipitation amount is 70 mm (2.8 in) spread over 9 days.

March Precipitation Trends in Northwest

The chart displays monthly precipitation patterns in Northwest, 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 Northwest, March typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Northwest

In Northwest in March, humidity is 81%. With an average temperature of 13°C (56°F), this humidity feels like a blanket of damp air that clings to your skin, making it essential to pack breathable clothing and stay hydrated while exploring.

March Average Humidity in Northwest

This chart illustrates the average monthly humidity levels in Northwest, 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 Northwest is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Northwest

In Northwest in March, 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 Northwest.

Maximum UV Index Levels in Northwest for March

The chart shows the monthly maximum UV Index (UVI) for Northwest 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 Northwest typically reaches 8, which falls under the very high exposure category.

Data source: Northwest 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 Northwest Compares to Other Months

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

This table compares monthly weather conditions in Northwest, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	70 mm (2.8 inches)	85%	moderate
February Weather	12°C (53°F)	93 mm (3.7 inches)	82%	high
March Weather	13°C (56°F)	70 mm (2.8 inches)	81%	very high
April Weather	18°C (64°F)	94 mm (3.7 inches)	80%	very high
May Weather	22°C (72°F)	120 mm (4.7 inches)	81%	extreme
June Weather	25°C (77°F)	160 mm (6.3 inches)	81%	extreme
July Weather	27°C (80°F)	171 mm (6.7 inches)	81%	extreme
August Weather	26°C (80°F)	205 mm (8.1 inches)	80%	very high
September Weather	24°C (76°F)	193 mm (7.6 inches)	79%	very high
October Weather	20°C (69°F)	64 mm (2.5 inches)	80%	very high
November Weather	13°C (55°F)	110 mm (4.3 inches)	85%	high
December Weather	10°C (51°F)	124 mm (4.9 inches)	86%	moderate