Climate and monthly weather forecast
Oregon City, OR

Share

The climate of Oregon City

Oregon City, situated in the state of Oregon, USA, enjoys a Mediterranean climate with warm summers, classified as Csb according to the Köppen climate classification. The city experiences a general pattern of moderate to high humidity with significant rainfall throughout the year. However, the wettest period falls between November to January, with the least amount occurring during summer months- July to August.

Averaging temperatures in Oregon City range from 34.3°F (1.3°C) to 81.1°F (27.3°C) across the year. The warmest months are July and August, with average temperatures soaring up to 80.2°F (26.8°C) and 81.1°F (27.3°C) respectively. On the flip side, December and January see the lowest temperature with an average of 34.3°F (1.3°C) and 35.2°F (1.8°C) respectively. The sunniest period happens in summer, with maximum sunlight exposure observed in July with approximately 15.3 daylight hours.

Rainfall levels in Oregon City display significant variation across the year, with December experiencing the highest average rainfall of 5.16" (131mm). Conversely, the month of July records the lowest average rainfall of 0.24" (6mm). Snowfall is quite unusual and is primarily observed in the winter months from November to March, with February registering the highest snowfall at 1.5" (38mm).

The best time to visit Oregon City

The optimal period to visit Oregon City is between May to August. During this time, the city experiences warm weather combined with lower rain levels and more abundant sunshine, making it a perfect moment for outdoor activities. The average temperature in these months ranges from 58.5°F (14.7°C) in May to 81.1°F (27.3°C) in August. August also registers the lowest cloud cover at 22%, ensuring clear skies and superb visibility.

The worst time to visit Oregon City

The least favorable time to visit the city is during the cooler months from November to February. Temperatures during this period can drop to an average low of 34.3°F (1.3°C) in December. Alongside lower temperatures, the city experiences higher levels of precipitation- up to 5.16" (131mm) in December. Additionally, less sunlight is observed during these months, reducing opportunities for outdoor activities.

Spring weather in Oregon City

Spring in Oregon City, falling between March to May, sees warming temperatures and decreasing rainfall levels. Average temperatures range from 37.8°F (3.2°C) to 66.6°F (19.2°C), with May being the warmest month of the season. Rain levels show a declining trend during this period, from a high of 3.86" (98mm) in March, dropping to 1.81" (46mm) by May.

Summer weather in Oregon City

June to August marks the summer season in Oregon City with temperatures hovering from 71.8°F (22.1°C) to 81.1°F (27.3°C). With the lowest rainfall averages between 0.24" (6mm) to 1.18" (30mm) and more than 9 hours of bright sunlight per day on average, these months are optimal for outdoor activities and sightseeing.

Autumn weather in Oregon City

The period of September to November sees cooler weather with increasing rainfall. Temperatures average from 50.9°F (10.5°C) to 73.6°F (23.1°C), as the daylight hours start to decline. Rainfall begins to increase from an average of 1.5" (38mm) in September, escalating to 3.7" (94mm) in November, signaling the onset of the wet season.

Winter weather in Oregon City

Winter arrives in December and lasts till February in Oregon City, accompanied by cooler temperatures, ranging from 34.3°F (1.3°C) to 52.2°F (11.2°C). Rainfall peaks at an average of 5.16" (131mm) in December, gradually falling to 3.74" (95mm) in February. Snowfall, although primarily nominal, may occur, particularly in December and January, averaging to 0.67" (17mm) and 1.5" (38mm) respectively.

Weather in January

The first month of the year begins with mostly cool and humid conditions in Oregon City, lending to a somewhat gloomy ambiance. Frequent rainfall contributes to the city's atmospheric moisture, rendering a palpable chill in the air. Weather in January »

Weather in February

The weather in February in Oregon City displays a discernible continuity from January, with prevalent cool and damp conditions. A minor rise in temperature hints at the approaching spring. Notably, this month sees a slight pick-up in snowfall with a total accumulation of 1.5" (38mm) over approximately 2.3 days. Weather in February »

Weather in March

The weather during March brings enhanced freshness and vibrancy to Oregon City, owing to the onset of spring. Increased sunlight hours gradually thaw the winter frost, while signaling the commencement of the growing season. March is distinguished by its above-par rainfall of 3.86" (98mm) occurring over some 20.3 days, making it one of the wetter months. Weather in March »

Weather in April

April in Oregon City heralds the full arrival of the spring season as temperatures climb, and the city begins to shake off the residual winter chill. Prolonged daylight hours color the city vibrantly, inviting residents and tourists alike to venture outdoors. Weather in April »

Weather in May

May exhibits the true spirit of the spring season in Oregon City as the weather continues to warm. The city in May is characterized by blossoming flora under the increasingly common sunshine. A major shift observed in this month pertains to the considerable decrease of rainfall to 1.81" (46mm) over approximately 13.7 days. Weather in May »

Weather in June

Weather conditions in Oregon City shift dramatically in June as summer asserts its dominance. As the days grow longer, the sun shines intensively, making days pleasantly warm. A defining trait of this month is the elongated sunshine duration of nearly 15.6 hours, triggering a notable ascent in temperatures. Weather in June »

Weather in July

Among all the months, July exhibits the most prominent summery weather in Oregon City. The increased daylight enhances outdoor activities, making picnics and park visits all the more delightful. July is characterized by the highest average high temperature recorded in the year at 80.2°F (26.8°C) as well as the scanty rainfall limited to 0.24" (6mm) across 4.3 days. Weather in July »

Weather in August

August continues the peak summer trend set in July, keeping Oregon City bathed in warm, sunny weather. Prolonged sunshine and scanty rainfall establish this month as a perfect time for exploring the beauty of the city’s terrain. Weather in August »

Weather in September

The onset of autumn in September brings with it a gradual coolness to the weather in Oregon City. The cityscape takes on a palette of warm hues while shorter daylight hours hint towards the forthcoming winter. Worth mentioning is the drastic drop in daytime high temperatures to 73.6°F (23.1°C) which heralds cooler days ahead. Weather in September »

Weather in October

October's weather reflects a dynamic shift as fall takes firm hold in Oregon City. The shortening daylight causes temperatures to drop, resulting in cooler days and noticeably colder nights. This month witnesses a steep rise in rainfall with an accumulation of 3.35" (85mm) throughout an average of 15.2 rainy days. Weather in October »

Weather in November

November sees the return of damp and cold conditions with the approach of winter in Oregon City. The fall’s colorful leaves gradually disappear, revealing skeletal tree silhouettes under the gloomy sky. A notable attribute of November is the significant increase in average relative humidity to 82%, indicating a markedly cold and damp ambiance. Weather in November »

Weather in December

The weather in Oregon City in December is characterized by winter's full arrival, marked by shorter days and longer, colder nights. Light snowfall blankets the city, adding to the charm of the holiday season. A unique detail about this month is the return of snowfall, albeit light, accumulating to approximately 0.51" (13mm) over a span of 0.9 days. Weather in December »

Frequently asked questions

How many days does it rain?

In Oregon City, during the entire year, the rain falls for 169.9 days and collects up to 32.76" (832mm) of precipitation.

When does it snow?

January through March, November and December are months with snowfall.

How much does it snow?

Throughout the year, there are 6.1 snowfall days, and 4.17" (106mm) of snow is accumulated.

What are the months with the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the most humid month?

The most humid month is February, with an average relative humidity of 84%.

When does it snow the most?

The month with the most snowfall is February, when snow falls for 2.3 days and typically aggregates up to 1.5" (38mm) of snow.

What is the month with the least sunshine?

The month with the least sunshine is February, with an average of 4.3h of sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow?

April through October are months without snowfall.

When are the longest days?

The month with the longest days is June, with an average of 15h and 36min of daylight.

What is the driest month in Oregon City?

The month with the least rainfall is July, when the rain falls for 4.3 days and typically collects 0.24" (6mm) of precipitation.

When is the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 6.

What are the warmest months?

August is the warmest month in Oregon City, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 54°F (12.2°C).

What is the least humid month?

With an average relative humidity of 64%, August is the least humid month.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 11.1h of sunshine.

What are the coldest months?

The coldest period in Oregon City is December, when temperatures fluctuate between an average high of 44.4°F (6.9°C) and a low of 34.3°F (1.3°C).

What is the wettest month?

December is the month with the most rainfall. Rain falls for 19.2 days and accumulates 5.16" (131mm) of precipitation.

What is the month with the shortest days in Oregon City?

December has the shortest days of the year, with an average of 8h and 48min of daylight.

Average temperature
Oregon City, OR

Average temperature - Oregon City, OR

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (44.4°F).

The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).

Average pressure
Oregon City, OR

Average pressure - Oregon City, OR

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed
Oregon City, OR

Average wind speed - Oregon City, OR

The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

Average humidity
Oregon City, OR

Average humidity - Oregon City, OR

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (64%).

Average rainfall
Oregon City, OR

Average rainfall - Oregon City, OR

The wettest month (with the highest rainfall) is December (5.16").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days
Oregon City, OR

Average rainfall days - Oregon City, OR

The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (4 days).

Average snowfall
Oregon City, OR

Average snowfall - Oregon City, OR

The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days
Oregon City, OR

Average snowfall days - Oregon City, OR

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Oregon City, OR

Average daylight / Average sunshine - Oregon City, OR

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days
Oregon City, OR

Average sunshine days - Oregon City, OR

The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is February (8.1 days).

Average UV index
Oregon City, OR

Average UV index - Oregon City, OR

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Oregon City, OR

Average visibility - Oregon City, OR

The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).

Oregon City, Oregon, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location