January weather forecast
Corvallis, OR

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A large river with two bridges across it in the city of Corvalis, Oregon, home to the famed Oregon State University
A large river with two bridges across it in the city of Corvalis, Oregon, home to the famed Oregon State University

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. Daylight hours increase marginally and the partial cover of clouds persists. The month of January is particularly known for reaching the peak of relative humidity, standing at 88%. Also noteworthy is the fact that snowfall begins to reduce, dropping to 0.79" (20mm) from the previous month's 0.24" (6mm).

Temperature

January brings an average high-temperature of a still chilly 47.3°F (8.5°C), showing a slight difference from December's 44.8°F (7.1°C). In the month of January, the average low-temperature in Corvallis usually rests at a cold 34.9°F (1.6°C).

Humidity

The average relative humidity in January is 88%.

Rainfall

In Corvallis, Oregon, in January, it is raining for 17.8 days, with typically 4.37" (111mm) of accumulated precipitation. In Corvallis, during the entire year, the rain falls for 169.2 days and collects up to 30.28" (769mm) of precipitation.

Snowfall

Months with snowfall in Corvallis are January through March, November and December. In Corvallis, during January, snow falls for 1 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, there are 4.6 snowfall days, and 3.27" (83mm) of snow is accumulated.

Daylight

In January, the average length of the day in Corvallis is 9h and 17min.
On the first day of the month, sunrise is at 7:49 am and sunset at 4:43 pm. On the last day of January, sunrise is at 7:32 am and sunset at 5:20 pm PST.

Sunshine

In January, the average sunshine is 3.9h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Corvallis. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In January, the maximum UV index of 2 translates into these guidelines:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Frequently asked questions

What is the temperature in January in Corvallis?

In Corvallis, in January, the average high-temperature is 47.3°F (8.5°C), and the average low-temperature is 34.9°F (1.6°C).

What is the average humidity in January in Corvallis?

In Corvallis, the average relative humidity in January is 88%.

How much does it rain in Corvallis in January?

In Corvallis, Oregon, during January, the rain falls for 17.8 days and regularly aggregates up to 4.37" (111mm) of precipitation.

How many days does it snow in January in Corvallis?

In Corvallis, Oregon, during January, snow falls for 1 days and regularly aggregates up to 0.79" (20mm) of snow.

How many hours of daylight does Corvallis have in January?

The average day length in January is 9h and 17min.

When is the sunrise / sunset in January in Corvallis?

In January, on the first day of the month, sunrise is at 7:49 am and sunset at 4:43 pm. On the last day of the month, in Corvallis, Oregon, sunrise is at 7:32 am and sunset at 5:20 pm PST.

How many hours of sunshine does Corvallis have in January?

In January, the average sunshine duration is 3.9h.

When is the lowest UV index in Corvallis?

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

What is the UV index intensity in January in Corvallis?

In Corvallis, Oregon, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Corvallis, OR

Average temperature in January - Corvallis, OR
  • Average high temperature in January: 47.3°F

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).

  • Average low temperature in January: 34.9°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).

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Average pressure in January
Corvallis, OR

Average pressure in January - Corvallis, OR
  • Average pressure in January: 30.11"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).

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Average wind speed in January
Corvallis, OR

Average wind speed in January - Corvallis, OR
  • Average wind speed in January: 4.7mph

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).

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Average humidity in January
Corvallis, OR

Average humidity in January - Corvallis, OR
  • Average humidity in January: 88%

The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (69%).

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Average rainfall in January
Corvallis, OR

Average rainfall in January - Corvallis, OR
  • Average rainfall in January: 4.37"

The wettest month (with the highest rainfall) is December (4.8").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in January
Corvallis, OR

Average rainfall days in January - Corvallis, OR
  • Average rainfall days in January: 17.8 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).

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Average snowfall in January
Corvallis, OR

Average snowfall in January - Corvallis, OR
  • Average snowfall in January: 0.79"

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").

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Average snowfall days in January
Corvallis, OR

Average snowfall days in January - Corvallis, OR
  • Average snowfall days in January: 1 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).

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Average daylight in January /
Average sunshine in January
Corvallis, OR

Average daylight in January / Average sunshine in January - Corvallis, OR
  • Average daylight in January: 9h and 2min

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 5min

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).

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Average sunshine days in January
Corvallis, OR

Average sunshine days in January - Corvallis, OR
  • Average sunshine days in January: 11.8 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).

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Average UV index in January
Corvallis, OR

Average UV index in January - Corvallis, OR
  • Average UV index in January: 2

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).

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Average cloud cover in January
Corvallis, OR

Average cloud cover in January - Corvallis, OR
  • Average cloud cover in January: 61

The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in January
Corvallis, OR

Average visibility in January - Corvallis, OR
  • Average visibility in January: 4mi

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).

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Corvallis, Oregon, USA

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