Oregon Climate – June 2026 Update
Top 5 Cities: Portland, Salem, Eugene, Gresham, and Hillsboro
This month in numbers
Oregon experienced its 6th warmest April–June period on record, with an average temperature of 12.22°C, a significant 1.9°C above the 1961–1990 baseline. Maximum temperatures for this three-month span also ranked 6th highest on record, at 19.74°C, an anomaly of +2.5°C. June 2026 itself saw an average temperature of 15.67°C, ranking 16th warmest, while precipitation was notably low at 24.38 mm, ranking 58th driest. Globally, June 2026 was the 3rd warmest June on record for land temperatures, and the April–June period ranked as the 2nd warmest for global land temperatures.
What changed
The past three months in Oregon have continued a trend of significantly warmer conditions, with both average and maximum temperatures ranking among the top 6 warmest on record. This contrasts with the national picture for June, where the US as a whole experienced a +1.6°C anomaly, slightly less pronounced than Oregon's +1.2°C for the month. Oregon's 1-month anomaly of +1.19°C places it as the warmest in the NOAA Northwest US climate region group, which had a group mean anomaly of +0.88°C. The state also saw considerably drier conditions in June, with precipitation 12.3 mm below average.
What’s driving change?
The persistent warmth in Oregon is largely influenced by the ongoing weak El Niño, which is forecast to strengthen rapidly into a strong or even very strong event through the autumn and early winter. El Niño typically brings warmer and drier conditions to the Pacific Northwest during summer, contributing to lower mountain snowpack and increased wildfire risk. Indeed, Oregon has experienced an unusual concentration of wildfire activity recently, with four wildfire events recorded between late June and early July, representing 100% of the annual total for the past 12 months. This early and active fire season, with over 400 wildfires already burning more than 8,000 acres, is linked to a historically warm winter and record-low snowpack. Additionally, one flood event was logged in Oregon between May and July, also representing 100% of the annual total for the past 12 months. You can track these events and more at Extreme Weather tracker.
Looking ahead
With El Niño conditions forecast to strengthen significantly, Oregon can anticipate continued above-normal temperatures and below-average precipitation through October, with an elevated wildfire risk, particularly east of the Cascades and expanding into southwestern Oregon by July. More information on the evolving ENSO phase can be found at ENSO.
Sources:
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – USA
Source: NOAA Climate at a Glance — US states & climate regions (tavg, pcp). Anomalies are vs the 1961–1990 baseline (temperature) or 1991–2020 (rainfall). See methodology.
Year-on-Year Trends
The 4byo Climate Helix – Oregon
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Oregon – Monthly Temperature – All Years
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Oregon
NOAA National Centers for Environmental Information - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm/cold + wet/dryKöppen Dsb · ContinentalOregon has both a clear warm/cold cycle (±9.6°C) and a wet/dry cycle (12× wet:dry ratio). Both sides of the annual rhythm are shown below.
Monthly rainfall climatology. A “wet month” exceeds the baseline monthly mean (dashed gold line). Biggest month-to-month shift: Jan (-23 mm, -17%).
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Precipitation
Rainfall & Rain Days – Totals
Climate Systems
Loading ENSO tracker…
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Oregon
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
FAQs
FAQs
How is the climate in Oregon changing?
Oregon is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
Where does the climate data for Oregon come from?
Climate data for Oregon comes from NOAA Climate at a Glance (temperature and precipitation), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Oregon climate data cover?
The Oregon climate profile covers Portland, Salem, Eugene, Gresham and surrounding areas. Oregon climate data from NOAA Climate at a Glance
How often is the Oregon climate update refreshed?
The Oregon climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.