January weather forecast
Salem, OR

An evening shot of the leafy town of Salem in Oregon
An evening shot of the leafy town of Salem in Oregon

Weather in January

January, like December, is a frosty winter month in Salem, Oregon, with an average temperature fluctuating between 47.7°F (8.7°C) and 35.2°F (1.8°C).

Temperature

In Salem, Oregon, the average high-temperature in January is almost the same as in December - a still chilly 47.7°F (8.7°C). The average low-temperature, in January, is 35.2°F (1.8°C).

Humidity

The months with the highest humidity in Salem are January, February and December, with an average relative humidity of 86%.

Rainfall

In January, in Salem, the rain falls for 17.1 days. Throughout January, 3.66" (93mm) of precipitation is accumulated. In Salem, during the entire year, the rain falls for 162.5 days and collects up to 25.08" (637mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In January, in Salem, Oregon, it is snowing for 0.9 days. Throughout January, 0.43" (11mm) of snow is accumulated. In Salem, during the entire year, snow falls for 4.7 days and aggregates up to 2.48" (63mm) of snow.

Daylight

In January, the average length of the day is 9h and 15min.
On the first day of January, sunrise is at 7:50 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:18 pm PST.

Sunshine

In Salem, Oregon, the average sunshine in January is 4.3h.

UV index

The months with the lowest UV index in Salem are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in January transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What are the most humid months in Salem?

January, February and December, with an average relative humidity of 86%, are most humid months in Salem, Oregon.

What is the average humidity in January in Salem?

In January, the average relative humidity is 86%.

How many days does it rain in January in Salem?

In January, the rain falls for 17.1 days. Throughout January, 3.66" (93mm) of precipitation is accumulated.

How many days does it snow in January in Salem?

In Salem, in January, snow falls for 0.9 days, with typically accumulated 0.43" (11mm) of snow.

What is the average length of the day in January in Salem?

The average day length in January in Salem, Oregon, is 9h and 15min.

When are sunrise and sunset in January in Salem?

In January, on the first day of the month, sunrise is at 7:50 am and sunset at 4:41 pm. On the last day of the month, in Salem, sunrise is at 7:32 am and sunset at 5:18 pm PST.

How many hours of sunshine does Salem have in January?

In January, the average sunshine duration is 4.3h.

What is the month with the lowest UV index in Salem?

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

What is the UV index reading in January in Salem?

The average daily maximum UV index in January in Salem is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.

Average temperature in January
Salem, OR

Average temperature in January - Salem, OR
  • Average high temperature in January: 47.7°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (45.5°F).

  • Average low temperature in January: 35.2°F

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).

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Average pressure in January
Salem, OR

Average pressure in January - Salem, 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
Salem, OR

Average wind speed in January - Salem, OR
  • Average wind speed in January: 5.5mph

The windiest months (with the highest average wind speed) are January, March and November (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity in January
Salem, OR

Average humidity in January - Salem, OR
  • Average humidity in January: 86%

The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in January
Salem, OR

Average rainfall in January - Salem, OR
  • Average rainfall in January: 3.66"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in January
Salem, OR

Average rainfall days in January - Salem, OR
  • Average rainfall days in January: 17.1 days

The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is July (3.9 days).

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Average snowfall in January
Salem, OR

Average snowfall in January - Salem, OR
  • Average snowfall in January: 0.43"

The month with the highest snowfall is February (1.18").
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
Salem, OR

Average snowfall days in January - Salem, OR
  • Average snowfall days in January: 0.9 days

The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in January / Average sunshine in January - Salem, OR
  • Average daylight in January: 9h and 15min

The month with the longest days is June (Average daylight: 15h and 33min).
The month with the shortest days is December (Average daylight: 8h and 51min).

  • Average sunshine in January: 4.3h

The month with the most sunshine is August (Average sunshine: 11h).
The month with the least sunshine is February (Average sunshine: 4.2h).

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Average sunshine days in January
Salem, OR

Average sunshine days in January - Salem, OR
  • Average sunshine days in January: 12.4 days

The month with the most sunshine days is July (26.3 days).
The month with the least sunshine days is March (8.8 days).

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Average UV index in January
Salem, OR

Average UV index in January - Salem, 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).

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Average cloud cover in January
Salem, OR

Average cloud cover in January - Salem, OR
  • Average cloud cover in January: 57

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in January
Salem, OR

Average visibility in January - Salem, OR
  • Average visibility in January: 5mi

The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).

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