Climate and monthly weather forecastCorvallis, OR
Climate and monthly weather forecast
The climate of Corvallis
Corvallis, a city nestled in the heartland of Oregon, USA, is subject to Mediterranean warm summer climates. From a classification perspective, this weather type is denoted as Csb according to the Köppen climate system. This geographically niche area sports uniformly slightly varying weather throughout the year.Spanning silent, cold winters and warm, vibrant summers, Corvallis’ yearly temperatures traverse between 34.2°F (1.2°C) and 80.4°F (26.9°C). However, the line of humidity running parallel to this trend enhances the feel of the temperatures throughout the year, standing tall at an annual average of 79%.
There’s an interesting play of sunshine, with considerable fluctuations ranging from 3.6 hours to 10.8 hours a day. The setting sun also brings with it varied visibility levels, with an average of 4.5 miles. The city’s annual pressure averages around 30.05 in, a conducive level for maintaining the overall balanced climate.
Rainfall marks the city's character quite evidently, from a low of 0.28" (7mm) to a magnanimous 4.8" (122mm), while its windy counterpart ranges from 4mph (6.4km/h) to 4.9mph (7.9km/h) with gusts ranging up to 8.5mph (13.7km/h). Snowfall is not quite frequent, from 0" (0mm) to a nominal 1.77" (45mm).
The best time to visit Corvallis
Ideally, a visitor might consider the warmer summer months between June to August to experience Corvallis at its finest. In this period, daily temperatures average from 70.3°F (21.3°C) to 80.4°F (26.9°C) with the city receiving a maximum of 10.8 hours of sunshine in the day. Relative humidity hovers around the 70% mark with the barometer recording an average pressure of 30.05 in. This spell of the year witnesses a quite minimal amount of rainfall, ranging from 0.28" (7mm) to 0.47" (12mm).The worst time to visit Corvallis
Contrary to the summer months, the period from November to January might pose some displeasure for visitors. It is during these chilly months that the city experiences the lowest temperatures of the year, spanning from 34.2°F (1.2°C) to 51.4°F (10.8°C). In addition, these months record the highest humidity levels peaking at 88-89%. The city is also at its darkest during this duration with sunshine hours dwindling to 3.9 to 4.4 hours a day.Spring weather in Corvallis
In the transition from winter to summer, March to May in Corvallis offer a unique blend of temperature ranges from 51.8°F (11°C) to 65.1°F (18.4°C). Rainfall during spring varies from 2.8" (71mm) to 3.86" (98mm). On the other hand, the spring breeze is quite mild, with wind speeds fluctuating between 4.4mph (7.1km/h) to 4.9mph (7.9km/h). It's also in the spring season that the city begins its transition from lower to higher daylight hours, shifting from 12 hours to 14.8 hours.Summer weather in Corvallis
The vibrant months from June to August showcase a rich medley of warm temperatures ranging from 70.3°F (21.3°C) to 80.4°F (26.9°C). These months serve as the best period in terms of visibility with levels peaking at 5 miles. The humidity levels are at their lowest of the year, fluttering around the 70% mark while cloud coverage is also minimal. Interestingly, the city dishes out the highest UV indexes of 5, which makes it essential to keep the sunscreen handy.Autumn weather in Corvallis
The period from September to November paints Corvallis in an autumn hue, with temperatures dipping between 73.4°F (23°C) to 51.4°F (10.8°C). The wind's intensity during these months ranges from 4mph (6.4km/h) to 4.3mph (6.9km/h) with gusts reaching up to 7.3mph (11.7km/h). Rainfall indications start to creep up in this season, varying between 1.42" (36mm) to 3.5" (89mm). Simultaneously, the sunlight hours start dwindling from high summer numbers to approximately 5.2 hours by November.Winter weather in Corvallis
Winter in Corvallis spans the months of December to February, during which the city experiences the lowest temperatures of the year from 34.9°F (1.6°C) to 48.2°F (9°C). As the mercury falls, the rain becomes a constant companion with measurements going from 3.43" (87mm) to 4.8" (122mm). It’s also the period that receives some bits of snowfall registering from 0.04" (1mm) to 1.77" (45mm). Sunshine hours take a dip as well, dropping to a low of 3.6 hours in January.Weather in January
The beginning of the year in Corvallis, Oregon, ushers in chilly weather, marked by consistent rainfall, low visibility, and relatively short days. Temperatures start to rise slightly, moving from the freezing conditions of December. Weather in January »Weather in February
Winter continues its hold on Corvallis in February with temperatures remaining low, although not as cold as January. A steady amount of rainfall continues to characterize the weather along with frequent cloudy days leading to limited sunlight. Weather in February »Weather in March
As Corvallis, Oregon transitions into spring in March, a gradually warming trend penetrates the persistently cooler winter temperatures. Along with the increasing temperatures, the city witnesses lengthened daylight hours, and shorter nights. Weather in March »Weather in April
April is synonymous with springtime, bringing brighter, longer days to Corvallis, Oregon. Temperatures continue their ascent, and rainfall decreases slightly reducing the overall dampness felt in March. The lengthened daylight gives residents more time to enjoy outdoor activities. Weather in April »Weather in May
The transition into late spring in May sees Corvallis, Oregon heated up by warming temperatures. The city experiences less cloud cover, which results in more sunshine and consequently, higher UV index. The change in weather conditions encourages outdoor activities with its clear, sunny days and a remarkably low rainfall of 1.61" (41mm). Weather in May »Weather in June
June invites the summer season to Corvallis, Oregon. The weather is characterized by consistent sunshine, extended daylight hours, and warming temperatures, prompting residents to spend more time in outdoor activities. Rainfall reaches its lowest for the first half of the year, marking a distinct shift from previous months' frequent showers. Weather in June »Weather in July
July marks the height of summer in Corvallis, Oregon. This period offers the highest temperatures, with heat intensifying to a high of 78.6°F (25.9°C). The lengthiest daytime and the least rainfall of the year make it a time for enjoying outdoor pursuits. Weather in July »Weather in August
August continues to bath Corvallis, Oregon in warm, sunny weather. Although temperatures slightly decrease compared to July, they remain comfortably high. Similarly, daylight hours decrease modestly but still provide ample time for outdoor activities. Weather in August »Weather in September
September brings a salient shift in Corvallis, Oregon's weather as summer transitions into fall. Along with falling temperatures, daylight hours begin to shorten and more cloud coverage is observed. Mild rain returns, marking the beginning of the wetter part of the year. Weather in September »Weather in October
October ushers in the full onset of fall in Corvallis, Oregon. The month is characterized by cooler temperatures, increased cloud cover, and more frequent rainfall. The fall foliage, amplified by the drop in temperatures, transforms the city’s landscape with hues of amber, gold, and red. Weather in October »Weather in November
November in Corvallis, Oregon is a witness to the dramatic transition from fall to winter. The temperatures continue their downward trend, bringing colder days and longer nights. Further increased rainfall results in higher relative humidity. Weather in November »Weather in December
Winter descends in full force on Corvallis, Oregon in December. Cold temperatures combined with limited sunshine and shorter daylight hours create chilly conditions, perfect for indoor activities and cozy fireplaces. Rainfall reaches its peak for the year, contributing to the damp, colder climate. 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 Corvallis, Oregon, during the entire year, the rain falls for 169.2 days and collects up to 30.28" (769mm) of precipitation.
Months with snowfall are January through March, November and December.
In Corvallis, during the entire year, snow falls for 4.6 days and aggregates up to 3.27" (83mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the most snowfall in Corvallis. Snow falls for 1.8 days and accumulates 1.77" (45mm) of snow.
The month with the least sunshine is February, with an average of 3.6h 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 Corvallis, snow does not fall in April through October.
With an average of 15h and 30min of daylight, June has the longest days of the year.
The months with the highest UV index in Corvallis are June through August, with an average maximum UV index of 5.
July is the month with the least rainfall. Rain falls for 4.8 days and accumulates 0.28" (7mm) of precipitation.
July and August, with an average of 10.8h of sunshine, are months with the most sunshine.
The month of August sees the average highest temperatures, reaching 80.4°F (26.9°C) at the peak and 52°F (11.1°C) at the low.
With an average relative humidity of 69%, August is the least humid month in Corvallis.
During the coldest month in Corvallis, December, temperatures average a high of 44.8°F (7.1°C) and a low of 34.2°F (1.2°C).
December is the most humid month, with an average relative humidity of 89%.
The month with the most rainfall is December, when the rain falls for 19.1 days and typically aggregates up to 4.8" (122mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 54min of daylight.
Average temperature
Corvallis, OR
The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is December (44.8°F).
The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure
Corvallis, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.08"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.05"Hg
- Average pressure in July:
30.05"Hg - Average pressure in August:
30.01"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:
30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Corvallis, OR
- Average wind speed in January:
4.7mph - Average wind speed in February:
4.7mph - Average wind speed in March:
4.9mph - Average wind speed in April:
4.7mph - Average wind speed in May:
4.4mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.3mph - Average wind speed in November:
4.7mph - Average wind speed in December:
4.6mph
The windiest month (with the highest average wind speed) is March (4.9mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity
Corvallis, OR
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (69%).
Average rainfall
Corvallis, OR
- Average rainfall in January:
4.37" - Average rainfall in February:
3.43" - Average rainfall in March:
3.86" - Average rainfall in April:
2.8" - Average rainfall in May:
1.61" - Average rainfall in June:
1.22"
The wettest month (with the highest rainfall) is December (4.8").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days
Corvallis, OR
- Average rainfall days in January:
17.8 days - Average rainfall days in February:
17.7 days - Average rainfall days in March:
20.9 days - Average rainfall days in April:
18.3 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
11 days
- Average rainfall days in July:
4.8 days - Average rainfall days in August:
4.5 days - Average rainfall days in September:
9.3 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
18.5 days - Average rainfall days in December:
19.1 days
The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (4.5 days).
Average snowfall
Corvallis, OR
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Corvallis, OR
- Average snowfall days in January:
1 days - Average snowfall days in February:
1.8 days - Average snowfall days in March:
1.1 days - Average snowfall days in April:
0.1 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:
0.1 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Corvallis, OR
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- 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:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
3h and 36min - Average sunshine in March:
5h and 6min - Average sunshine in April:
6h and 36min - Average sunshine in May:
8h and 0min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 12min - Average sunshine in November:
4h and 24min - Average sunshine in December:
3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days
Corvallis, OR
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
9 days - Average sunshine days in April:
10 days - Average sunshine days in May:
17 days - Average sunshine days in June:
17 days
- Average sunshine days in July:
24.3 days - Average sunshine days in August:
23.6 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
11 days - Average sunshine days in December:
10.2 days
The month with the most sunshine days is July (24.3 days).
The month with the least sunshine days is February (8.4 days).
Average UV index
Corvallis, OR
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Corvallis, OR
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Corvallis, OR
The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).
