Oregon climate — normals and trends
Oregon (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.1 °C and it receives 887 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (23.2 °C on average) and the coldest is January (-3.8 °C). Rainfall peaks in May.
Oregon averages 112 frost days, 22 hot days (≥ 30 °C) and 121 rainy days per year.
Oregon has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 126 to 98 per year over the period.
The hottest day of the period reached 40.5 °C (on 25 June 1988) and the coldest -29.5 °C (on 19 January 1994).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
OregonOhio
- coords
- 41.64°, -83.49°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.1°C
Average daily high
14.4°C
Average daily low
5.9°C
Annual rainfall
887mm
Sunshine / day
8.7h
Mean relative humidity
73%
Average peak wind
21.5km/h
Seasonal range
27.0°C
Frost days (< 0 °C)
112 d/yr
Hot days (≥ 30 °C)
22 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
70.4 cm
Average feels-like high
12.3 °C
Average feels-like low
2.9 °C
Average peak gust
39.1 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.37 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
40.5 °C
25 June 1988
Coldest day
-29.5 °C
19 January 1994
Wettest day
75 mm
30 August 1975
Windiest day
59.9 km/h
22 March 1955
Strongest gust
106.2 km/h
11 November 1940
Hottest feels-like
43.7 °C
14 July 1995
Coldest feels-like
-36.9 °C
19 January 1994
Snowiest day
33.7 cm
1 December 1974
Sunniest day
14.9 h
23 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.2 °C | -0.9 °C | 41 mm | -21 mm |
| Feb | 0.8 °C | -0.2 °C | 49 mm | -8 mm |
| Mar | 12.1 °C | +5.5 °C | 58 mm | -18 mm |
| Apr | 15.4 °C | +1.6 °C | 113 mm | +21 mm |
| May | 18.5 °C | -1.8 °C | 117 mm | +24 mm |
| Jun | 26.6 °C | +1.0 °C | 97 mm | +10 mm |
| Jul | 29.0 °C | +1.2 °C | 116 mm | +38 mm |
| Aug | 26.0 °C | -0.9 °C | 34 mm | -40 mm |
| Sep | 24.6 °C | +1.5 °C | 41 mm | -22 mm |
| Oct | 18.5 °C | +1.9 °C | 66 mm | +2 mm |
| Nov | 9.1 °C | 0.0 °C | 54 mm | -18 mm |
| Dec | 2.2 °C | -0.2 °C | 69 mm | +1 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Oregon?
Oregon has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.1 °C and it receives 887 mm of precipitation per year.
What is the hottest day ever recorded in Oregon?
The hottest day measured in Oregon between 1940 and 2025 was 25 June 1988, reaching 40.5 °C.
What is the coldest day in Oregon?
The coldest day measured in Oregon between 1940 and 2025 was 19 January 1994, at -29.5 °C.
Does it snow in Oregon?
Yes. Oregon gets on average 70.4 cm of snow per year and has around 112 frost days.
Has the climate of Oregon warmed?
Yes: Oregon warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Oregon?
The wettest day measured in Oregon between 1940 and 2025 was 30 August 1975, with 75 mm of rain in 24 hours.
What was the windiest day in Oregon?
The windiest day measured in Oregon between 1940 and 2025 was 22 March 1955, with winds reaching 59.9 km/h.
What is the warmest month in Oregon?
The warmest month in Oregon is July (23.2 °C on average); the coldest is January (-3.8 °C).
How much does it rain in Oregon?
Oregon receives on average 887 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Oregon?
Oregon gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Oregon?
The heaviest 24-hour snowfall measured in Oregon between 1940 and 2025 was 1 December 1974, with 33.7 cm.
Are there tropical nights in Oregon?
Yes: Oregon has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Oregon?
In Oregon, between 1940 and 2025, the highest apparent temperature reached 43.7 °C on 14 July 1995, and the lowest was -36.9 °C on 19 January 1994.
Compare Oregon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Oregon