Oregon has an average annual temperature of
53.2°F
(across all 15 cities) with approximately
1314 mm of annual precipitation
and average humidity of 81%.
The warmest city is Grants Pass
with average July highs of 100.2°F,
while Klamath Falls
is the coldest with average January lows of 8.1°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Aug is typically the warmest month across Oregon with average highs around
95°F, while
Dec is the coldest with average lows near
19.6°F.
Dec is the wettest month with approximately
220 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
55°F
20.8°F
37.9°F
189
92%
0.7
1.40
Feb
59°F
21.7°F
40.5°F
148
89%
0.7
2.30
Mar
64.9°F
26.4°F
45.7°F
152
86%
0.7
3.40
Apr
73.2°F
29.7°F
51.4°F
108
83%
0.7
4.70
May
80.1°F
34.5°F
57.4°F
74
81%
0.6
5.80
Jun
85.8°F
40.5°F
63.1°F
48
78%
0.6
6.60
Jul
92.1°F
45.3°F
68.7°F
16
70%
0.6
7.10
Aug
95°F
46°F
70.5°F
16
65%
0.6
6.20
Sep
91.6°F
40.6°F
66.2°F
45
67%
0.6
4.70
Oct
79.9°F
31.5°F
55.8°F
109
76%
0.6
2.90
Nov
63.7°F
24.8°F
44.2°F
201
89%
0.7
1.60
Dec
54.1°F
19.6°F
36.9°F
220
92%
0.7
1.20
📈 Oregon Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Oregon Long-Term Climate Trends (1981–2025)
This chart shows how Oregon's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 15 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Oregon
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Oregon.
Oregon City is the wettest city in Oregon with approximately 1539 mm of annual precipitation on average. View Oregon City weather history →
What is the warmest month in Oregon?▼
Aug is the warmest month across Oregon, with state-wide average highs of 95°F and average lows of 46°F.
How many cities in Oregon have weather data?▼
TownPillar has historical weather data for 15 cities in Oregon, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Oregon?▼
Jul is the sunniest month across Oregon with an average solar radiation of 7.10 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 15 cities in Oregon at monthly temporal resolution.