January weather forecast
Cornelius, OR

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Weather in January

January, the same as December, in Cornelius, Oregon, is a frosty winter month, with an average temperature varying between 34.7°F (1.5°C) and 45.3°F (7.4°C).

Temperature

Upon the beginning of January, Cornelius's high-temperatures register at a still chilly 45.3°F (7.4°C), closely mirroring the preceding month. The average low-temperature, in January, is a wintry 34.7°F (1.5°C).

Humidity

The months with the highest humidity are January, February, November and December, with an average relative humidity of 85%.

Rainfall

January is the month with the most rainfall. Rain falls for 18.8 days and accumulates 4.57" (116mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Cornelius, in January, snow falls for 1.6 days, with typically accumulated 0.79" (20mm) of snow. Throughout the year, there are 6.6 snowfall days, and 4.53" (115mm) of snow is accumulated.

Daylight

In Cornelius, the average length of the day in January is 9h and 11min.
On the first day of the month, sunrise is at 7:52 am and sunset at 4:39 pm. On the last day of January, sunrise is at 7:34 am and sunset at 5:16 pm PST.

Sunshine

In Cornelius, the average sunshine in January is 3.8h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 2 in January translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.

Frequently asked questions

What are the temperatures in January?

The high-temperature during January is 45.3°F (7.4°C) and the low-temperature is 34.7°F (1.5°C).

What are the most humid months?

January, February, November and December, with an average relative humidity of 85%, are most humid months.

What is the average humidity in January?

In Cornelius, the average relative humidity in January is 85%.

What is the wettest month?

The month with the most rainfall is January, when the rain falls for 18.8 days and typically aggregates up to 4.57" (116mm) of precipitation.

How much does it rain in January?

In Cornelius, in January, it is raining for 18.8 days, with typically 4.57" (116mm) of accumulated precipitation.

How many days does it snow in January?

In Cornelius, in January, during 1.6 snowfall days, 0.79" (20mm) of snow is typically accumulated.

How many hours of daylight does Cornelius have in January?

The average day length in January is 9h and 11min.

What time are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:52 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:16 pm PST.

How many hours of sunshine does Cornelius have in January?

In January, the average sunshine duration is 3.8h.

What are the months with the lowest UV index?

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

What is the UV index reading in January?

The average daily maximum UV index in January in Cornelius is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Cornelius, OR

Average temperature in January - Cornelius, OR
  • Average high temperature in January: 45.3°F

The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (43.9°F).

  • Average low temperature in January: 34.7°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).

Average pressure in January
Cornelius, OR

Average pressure in January - Cornelius, 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).

Average wind speed in January
Cornelius, OR

Average wind speed in January - Cornelius, OR
  • Average wind speed in January: 4.9mph

The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).

Average humidity in January
Cornelius, OR

Average humidity in January - Cornelius, OR
  • Average humidity in January: 85%

The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).

Average rainfall in January
Cornelius, OR

Average rainfall in January - Cornelius, OR
  • Average rainfall in January: 4.57"

The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").

Average rainfall days in January
Cornelius, OR

Average rainfall days in January - Cornelius, OR
  • Average rainfall days in January: 18.8 days

The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).

Average snowfall in January
Cornelius, OR

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

The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January
Cornelius, OR

Average snowfall days in January - Cornelius, OR
  • Average snowfall days in January: 1.6 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in January / Average sunshine in January - Cornelius, OR
  • Average daylight in January: 9h and 1min

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: 3h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).

Average sunshine days in January
Cornelius, OR

Average sunshine days in January - Cornelius, OR
  • Average sunshine days in January: 10.8 days

The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).

Average UV index in January
Cornelius, OR

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

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 in January
Cornelius, OR

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

The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in January
Cornelius, OR

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

The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January and February (4mi).

Cornelius, Oregon, USA

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