Climate and monthly weather forecastWest Linn, OR
Climate and monthly weather forecast
The climate of West Linn
West Linn, Oregon, USA, nested in the Pacific Northwest, boasts a predominantly Csb climate according to the Köppen climate classification system. This indicates a Mediterranean climate with warm summers. The city's geographical position leaves it prone to a variety of atmospheric conditions that contribute to a generally wet and relatively mild climate.Ranging from a minimum of 35.1°F (1.7°C) in February to a maximum of 81.1°F (27.3°C) in August, the temperatures in West Linn display considerable consistency for most of the year. Relative humidity remains high throughout the year, fluctuating slightly from a maximum of 84% in February to a minimum at 64% in August.
Rainfall is most abundant from November to December at around 5.16" (131mm) while the driest period occurs in July recording only 0.24 inch of rainfall. The annual snowfall is notably low with the greatest amount witnessed in February at 1.5" (38mm). There is practically no snowfall from April to October.
Days are markedly longer and brighter from June to August with an average of around 15.5 daylight hours and 11 sunshine hours. Meanwhile, the winter months from November to January see fewer daylight hours averaging at around 9.5 daylight hours and 4.4 sunshine hours. The UV index reaches its peak in the summer months recording 6 in July and slumps down to 2 during the winter months.
The best time to visit West Linn
Considering West Linn’s Csb climate classification, the best time to visit would be between June and August. During these summer months, the temperatures range from a low of 51.6°F (10.9°C) to a high of 81.1°F (27.3°C), providing a comfortable climate for outdoor activities. Additionally, the region maximizes its daylight hours reaching up to 15.6 hours, thus allowing ample time for sightseeing.The worst time to visit West Linn
The least opportune time to visit West Linn usually falls between November and January. These months record the heaviest rainfall, averaging between 3.7" (94mm) and 5.16" (131mm). The temperatures also drop to lows of 34.3°F (1.3°C) in December, in addition to shorter daylight hours with an average of 9.5 daylight hours, making outdoor activities less desirable.Spring weather in West Linn
March to May mark the arrival of spring in West Linn. The temperatures in this period vary from a low of 37.8°F (3.2°C) in March to a high of 66.6°F (19.2°C) in May. The region notes a steady decrease in rainfall from 3.86" (98mm) in March to 1.81" (46mm) in May. Daylight hours also gradually increase from 12 hours in March to up to 14.9 hours towards the end of spring.Summer weather in West Linn
June to August in West Linn herald the heart of summer. In this season, temperatures range from a mild 51.6°F (10.9°C) low in June to a comfortable 81°F (27.2°C) peak in August. Simultaneously, the rainfall is at its lowest, standing at a mere 0.24 inch in July. The daylight hours reach their maximum, offering about 15.5 hours per day, complimented by an average of 11 sunshine hours and a substantial UV index of 6.Autumn weather in West Linn
Autumn dominates September to November in West Linn. In this period, temperatures begin to cool off, falling from the 73.6°F (23.1°C) high in September to a mild 50.9°F (10.5°C) in November. Rainfall starts to increase reaching 3.7" (94mm) in November. Additionally, daylight hours gradually shorten, with November registering about 9.5 hours.Winter weather in West Linn
Winter in West Linn spans from December to February. These are the coldest months with temperatures dipping down to 34.3°F (1.3°C) in December while averaging a high of 47.1°F (8.4°C) in February. Rainfall is at its peak with December witnessing up to 5.16" (131mm). Snowfall is also possible, especially in February with an average of 1.5" (38mm) recorded. However, daylight hours remain the shortest, with December and January seeing merely 8.8 to 9.2 hours respectively.Weather in January
In January, West Linn, Oregon experiences winter at its peak. The city endures its coldest month of the year, with temperatures decreasing to a frigid 35.2°F (1.8°C) and a relatively high of 46.2°F (7.9°C). The city sees the year's first snowfall at a minimal 0.67in but with a mere 1.3 snowfall days, residents often go by unimpacted. Weather in January »Weather in February
February is a transition period in West Linn, Oregon, from the nippy winter to an easing spring. A slight improvement in temperatures with a range of 35.1°F (1.7°C) to 47.1°F (8.4°C) nudges February closer to spring. Snowfall enhances the winter charm with 1.5in of snow blanketing the city on an average of 2.3 days. Weather in February »Weather in March
West Linn, Oregon, welcomes spring in March. A significant increment in temperatures, with a range between 37.8°F (3.2°C) and 52.2°F (11.2°C), hints at the end of winter. To add to the warming trend, the lengthening days courtesy of daylight saving time elevate the spirits of residents. Weather in March »Weather in April
April in West Linn, Oregon sees a notable warming trend along with the rich colors of spring. The temperatures rise to a comfortable range of 39.4°F (4.1°C) to 58.5°F (14.7°C), making the weather quite pleasant. As the city gears up for Easter celebrations, the increase in daylight hours to 13.6 hours adds to the jubilation. Weather in April »Weather in May
May in West Linn, Oregon marks a distinct departure from the typical spring weather, paving the way for summer. Soaring temperatures range between a mild 43.5°F (6.4°C) and a warm 66.6°F (19.2°C). With an uptick in daylight hours, signs of summer become evident. Weather in May »Weather in June
June in West Linn, Oregon brings the onset of summer, marked by increased warmth and extended daylight. Prototypical summer temperatures sway between a balmy 47.5°F (8.6°C) and a sizzling 71.8°F (22.1°C). With an average daylight of 15.6 hours, summer activities reach their peak. Weather in June »Weather in July
July in West Linn, Oregon is characterized by soaring temperatures and clear skies, turning the city into a true summer landscape. The mercury shoots up to a scorching 80.2°F (26.8°C), reflecting the peak summer month. Despite the intense heat, locals and tourists alike fill the city's parks and recreational sites. Weather in July »Weather in August
In August, West Linn, Oregon holds steadfast to its summer glory, with temperatures hovering from 54°F (12.2°C) to 81.1°F (27.3°C). The city experiences the hottest month of the year, making the local lakes and rivers a hotspot for cooling off. Weather in August »Weather in September
September in West Linn, Oregon marks the shift from high summer heat to the cooler, colorful world of fall. Temperatures steadily decline from the summer highs, ranging between 50.5°F (10.3°C) and 73.6°F (23.1°C). It's a season of transition, where the illumination of summer gives way to the mellow, orange light of fall. Weather in September »Weather in October
October in West Linn, Oregon ushers in the crisp fall weather with temperatures dropping down to a cool 45.1°F (7.3°C) and the highs averaging at 61.3°F (16.3°C). With the changing weather, the city enters an enchanting season of colors. Weather in October »Weather in November
November in West Linn, Oregon, witnesses the first signs of winter. Temperatures lie between a chilly 39.7°F (4.3°C) and a cool 50.9°F (10.5°C). With a thick layer of cloud cover, there's a ceaseless play of light and shadow across the city. Weather in November »Weather in December
December in West Linn, Oregon means a full swing into the cold and festive winter season. The mercury hovers from 34.3°F (1.3°C) to 44.4°F (6.9°C), confirming the arrival of winter. A notable feature of the month is the shortest day of the year, the winter solstice. Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In West Linn, 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.
In West Linn, during the entire year, snow falls for 6.1 days and aggregates up to 4.17" (106mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
With an average relative humidity of 84%, February is the most humid month.
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.
February has the least sunshine of the year, 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.
In West Linn, snow does not fall in April through October.
The month with the longest days is June, with an average of 15h and 36min of daylight.
July is the month with the least rainfall. Rain falls for 4.3 days and accumulates 0.24" (6mm) of precipitation.
With an average maximum UV index of 6, July is the month with the highest UV index.
With average high and low temperatures of 81.1°F (27.3°C) and 54°F (12.2°C) respectively, August is West Linn's warmest month.
The least humid month is August, with an average relative humidity of 64%.
The month with the most sunshine is August, with an average of 11.1h of sunshine.
West Linn's temperature records reveal December as the coldest month, marked by average highs of 44.4°F (6.9°C) and lows of 34.3°F (1.3°C).
The month with the most rainfall is December, when the rain falls for 19.2 days and typically aggregates up to 5.16" (131mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 48min of daylight.
Average temperature
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, OR
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (64%).
Average rainfall
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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
West Linn, 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).
