Humidity Levels in Oregon During January

The average humidity in January is listed below for places in Oregon. The tables give daily averages along with highest and lowest relative humidity levels.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

All the numbers here are averages for the years 1961 to 1990.

Average Humidity

In this table, the Daily number is the average of humidity readings taken every three hours throughout the day. Morning percentages are for 7 am and Afternoon measures are for 4 pm local standard time.

Average relative humidity (%) in January
Daily Place Morning Afternoon
83 Astoria 86 77
88 Eugene 91 79
84 Medford 91 71
77 Pendleton 80 73
81 Portland 85 74
83 Salem 87 75

Highest and Lowest Humidity

Below are the averages during January for maximum and minimum humidity levels in Oregon. The hours when this month's highest and lowest humidity readings usually occur are given in local standard time.

Daily high and low relative humidity (%) averages in January
High Time Place Low Time
85.8 7 am Astoria 76.9 1 pm
91.0 4 am Eugene 79.2 4 pm
90.9 7 am Medford 70.8 4 pm
79.6 7 am Pendleton 71.1 1 pm
85.4 7 am Portland 74.0 4 pm
86.7 7 am Salem 75.2 4 pm

World Data Center for Meteorology. Climate of the World.

Oregon Humidity
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