Climate and monthly weather forecastOregon City, OR
Climate and monthly weather forecast
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 »Updated: Jul 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Oregon City, during the entire year, the rain falls for 169.9 days and collects up to 32.76" (832mm) of precipitation.
January through March, November and December are months with snowfall.
Throughout the year, there are 6.1 snowfall days, and 4.17" (106mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The most humid month is February, with an average relative humidity of 84%.
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.
The month with the least sunshine is February, with an average of 4.3h of sunshine.
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.
April through October are months without snowfall.
The month with the longest days is June, with an average of 15h and 36min of daylight.
The month with the least rainfall is July, when the rain falls for 4.3 days and typically collects 0.24" (6mm) of precipitation.
The month with the highest UV index is July, with an average maximum UV index of 6.
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).
With an average relative humidity of 64%, August is the least humid month.
The month with the most sunshine is August, with an average of 11.1h of sunshine.
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).
December is the month with the most rainfall. Rain falls for 19.2 days and accumulates 5.16" (131mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 48min of daylight.
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 in January:
30.12"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.11"Hg
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 in January:
6mph - Average wind speed in February:
5.7mph - Average wind speed in March:
5.5mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.1mph - Average wind speed in June:
4mph
- Average wind speed in July:
3.8mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.7mph - Average wind speed in December:
5.7mph
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
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 in January:
4.72" - Average rainfall in February:
3.74" - Average rainfall in March:
3.86" - Average rainfall in April:
3.23" - Average rainfall in May:
1.81" - Average rainfall in June:
1.18"
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 in January:
18.4 days - Average rainfall days in February:
17.3 days - Average rainfall days in March:
20.3 days - Average rainfall days in April:
18.7 days - Average rainfall days in May:
13.7 days - Average rainfall days in June:
10.5 days
- Average rainfall days in July:
4.3 days - Average rainfall days in August:
4 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
15.2 days - Average rainfall days in November:
18.8 days - Average rainfall days in December:
19.2 days
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
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 in January:
1.3 days - Average snowfall days in February:
2.3 days - Average snowfall days in March:
1.3 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
0.9 days
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 in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
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).
- Average sunshine in January:
4h and 24min - Average sunshine in February:
4h and 18min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 48min - Average sunshine in May:
9h and 0min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
11h and 6min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 36min - Average sunshine in November:
4h and 48min - Average sunshine in December:
4h and 24min
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 in January:
11.1 days - Average sunshine days in February:
8.1 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
9.7 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
17.4 days
- Average sunshine days in July:
26.2 days - Average sunshine days in August:
25.3 days - Average sunshine days in September:
19 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
9.7 days - Average sunshine days in December:
10.5 days
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
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 cloud cover
Oregon City, OR
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
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).
