Willamette National Forest (OR) Temperature by Month
Willamette National Forest, Oregon, United States of America has an average annual maximum temperature of 13°C (55°F), ranging from 4°C (39°F) in December to 23°C (73°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Willamette National Forest Monthly Temperatures
Visitors to Willamette National Forest can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 9°C (48°F) in July to -3°C (27°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Willamette National Forest by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak.
The chart below shows the average temperature throughout the year:
Temperature: Willamette National Forest vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
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moderate
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Willamette National Forest vs World: Temperature Compared
Willamette National Forest's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Willamette National Forest's weather — including monthly rainfall, sunshine hours, and humidity — visit our Willamette National Forest climate page.
