What Are the Warmest Cities in Oregon?

In this article I’m going to share with you my ranking of the warmest places in Oregon.

I created my list by researching data provided by the National Oceanic and Atmospheric Administration and other climate data providers.

Below I’m listing the top 10 warmest places in Oregon that have the highest average yearly temperatures. Later in the article I share a table with 50 most populous cities in Oregon.

Top 10 Warmest Cities in Oregon

Here are the top 10 warmest places in Oregon ranked by their daily mean temperature. Because Oregon has a fairly uniform climate compared to other states, the annual daily mean temperature of these destinations is only slightly higher than the average for the 50 cities I researched for this article (52.38 °F).

For the top five cities I also give average winter and summer temperatures.

1. Ontario – daily mean temperature of 56.1 °F

Lying along the Snake River at the Idaho border in Eastern Oregon, the small city of Ontario is the warmest place in Oregon. But there’s a caveat: Ontario is so warm because it features a cold desert climate with some of the hottest summers in the entire state (temperatures go up to 93 °F). Its winters are much colder than in other cities featured in this top10 ranking (temperatures during the day reach 39-45 °F).

If your definition of best weather is less extreme yearly variations in temperature, Ontario is not the best choice (a better choice is the mild southern Oregon coast near the California border). But if you’re after a lot of sun, Ontario is one of the top sunny places in Oregon.

Winter temperatures: highs of 38-47 °F, lows of 24-28 °F

Summer temperatures: highs of 85-95 °F, lows of 55-62 °F

2. Medford – daily mean temperature of 55.95 °F

Medford, located in Southern Oregon, is a city of 85,000 people. It features a Mediterranean climate with hot summers and mild winters. Medford benefits from a rain shadow effect as it’s located between the Cascade Range and Siskiyou Mountains. This makes its climate drier and sunnier than locations north of the city, in the Willamette Valley, where 70% of Oregon’s population lives.

While it’s not the sunniest city in Oregon, it has much more days of blue skies than other parts of the state. The difference between Medford’s mild climate and Ontario’s high desert climate is very noticeable, too. Daily highs in the winter are between 46-54 °F compared to 39-45 °F. Summer highs are about 2-3 degrees cooler. If you’re looking for the warmest location in Oregon that has mild winters and hot summers, Medford is one of the best options.

If you were to look for the warmest place in Oregon right now every day of the year, most of the time Medford would win.

Winter temperatures: highs of 46-54 °F, lows of 33-34 °F

Summer temperatures: highs of 82-92 °F, lows of 52-59 °F

3. Grants Pass – daily mean temperature of 55.6 °F

Grants Pass has a population of about 39,000 inhabitants. Its motto “It’s the climate!” is fitting: it has some of the best weather in Oregon, with its area usually showing up in forecast maps with more favorable weather than the rest of the state.

While it features similar temperatures to Medford, its lows in the winter are higher, with no month getting average nighttime temperatures close to freezing. More specifically, while Medford sees winter lows of 32-34 °F, Grants Pass gets 35-36 °F. Because Grants Pass is only 30 miles west of Medford, it benefits from the same rain shadow effect caused by the Cascade Mountain Range and is one of the sunniest cities in Oregon that’s not a high desert.

Winter temperatures: highs of 46-54 °F, lows of 35-36 °F

Summer temperatures: highs of 81-91 °F, lows of 51-56 °F

4. Oregon City – daily mean temperature of 55.15 °F

Oregon City is located in North Oregon, on the Willamette River, near the southern city limits of Portland. The city is a part of the Portland Metropolitan Area. It’s the first city in this ranking located in the heart of Oregon, in the Willamette Valley. It has the same mild winters as Grants Pass. Its summers are much cooler than in both Grants Pass and Medford, with average daily highs not going above 83 °F (compared to 91 °F in the two cities in southern Oregon).

Winter temperatures: highs of 47-53 °F, lows of 36-37 °F

Summer temperatures: highs of 76-83 °F, lows of 53-57 °F

5. Roseburg – daily mean temperature of 55.15 °F

Roseburg is a city of 24,000 people, located 69 miles north of Grants Pass. Roseburg used to be known for its lumber industry. These days, it’s home to many vineyards and wineries. It has milder winters than all previous cities on the list, with daily highs between 48-55 °F and lows like in Oregon City. It has cooler summers than nearby cities, too, with average highs more resembling those of Oregon City (Roseburg has summers that are about a degree warmer).

Winter temperatures: highs of 48-54 °F, lows of 37-38 °F

Summer temperatures: highs of 77-86 °F, lows of 53-57 °F

6. Portland – daily mean temperature of 55.05 °F

The most populous city in Oregon has a romantic story related to its climate. It’s said that its cool spring nights and moderate winters encourage spectacular rose blooms. This is why Portland has been called the City of Roses since 1905. Compared to the previous cities in this ranking, Portland gets more precipitation (though less than Oregon City). Its summers are cooler than any of the previous cities, with average highs not getting above 82 °F. Winter months are also cooler than in all the previous cities except for the desert-influenced Ontario.

7. West Linn – daily mean temperature of 55 °F

West Linn is another city forming the Portland metro. It’s right across the Willamette River from Oregon City, on the west side of the river. Considering that the cities are 2 miles away from each other, they have virtually the same climate.

8. Central Point – daily mean temperature of 55 °F

Central Point is located 5 miles south of Oregon City. As West Linn, there’s no difference in climate between these locations. It has warm summers and mild winters, with sun shining less often than in the southern part of the state.

9. Salem – daily mean temperature of 54.65 °F

Salem, the third biggest city of Oregon, is situated 46 miles southwest of Portland. As a curiosity, the halfway point between the North Pole and the Equator passes through Salem’s city limits. As most cities in the Willamette Valley, Salem enjoys a mild Mediterranean climate.

10. Sutherlin – daily mean temperature of 54.5 °F

Sutherlin is located 13 miles north of Roseburg. It has slightly more precipitation. Other than that, there are no noticeable differences in weather between these two cities.

Video Summary of the Warmest Oregon Cities

50 Biggest Cities in Oregon Ranked by Daily Mean Temperature

Salem is the ninth warmest city in Oregon

I created the table below by researching data for the most populous municipalities in Oregon. When I couldn’t find data for a given city, I moved on to another. While the list includes 50 cities, some of the bigger cities may be missing because there was no data for them. Please check the closest geographically city then.

City	Average high temperature (°F)	Average low temperature (°F)	Daily mean temperature (°F)
Ontario	66.5	45.7	56.1
Medford	68.3	43.6	55.95
Grants Pass	68	43.2	55.6
Oregon City	65	45.3	55.15
Roseburg	65.4	44.9	55.15
Portland	63.9	46.2	55.05
West Linn	65	45	55
Central Point	68	42	55
Salem	65.4	43.9	54.65
Sutherlin	65	44	54.5
The Dalles	64.5	43.6	54.05
Gresham	64	44	54
Wilsonville	64	44	54
Umatilla	66.6	41.3	53.95
Brookings	60.1	47.7	53.9
Milton-Freewater	64.7	42.9	53.8
Newberg	62.5	45	53.75
Eugene	64.3	41.9	53.1
North Bend	59.7	46.4	53.05
Woodburn	63	43	53
St. Helens	62.7	43.3	53
Scappoose	63.2	42.8	53
Beaverton	63	42.7	52.85
McMinnville	63.5	42.2	52.85
Corvallis	63.4	42	52.7
Hermiston	65.7	39.7	52.7
Coos Bay	59.8	45.5	52.65
Silverton	61.7	43.3	52.5
Stayton	62.9	42.1	52.5
Hillsboro	63.4	41.5	52.45
Pendleton	63.3	41.3	52.3
Albany	63.3	41.2	52.25
Ashland	66.6	37.9	52.25
Cottage Grove	63.6	40.9	52.25
Forest Grove	62.4	41.9	52.15
Dallas	62.4	41.2	51.8
Sweet Home	59.3	44.3	51.8
Seaside	58.5	44.8	51.65
Sandy	60	43	51.5
Astoria	58.4	44.5	51.45
Hood River	61.2	41.1	51.15
Newport	56.9	44.3	50.6
Florence	58	42.6	50.3
La Grande	60.7	37.2	48.95
Madras	63.7	32.5	48.1
Klamath Falls	61	35	48
Bend	61.1	34.1	47.6
Prineville	63.5	31.4	47.45
Redmond	62.1	32.7	47.4
Baker City	58.7	30.2	44.45

Check the Warmest Cities in Neighboring States

If you’re interested in learning about the warmest cities in states neighboring Oregon, check out the following articles:

Also check my article on the warmest cities in the US in every state. Oregon is one of the best weather states if you like mild weather.