Maine Climate – June 2026 Update
Top 5 Cities: Portland, Lewiston, Bangor, South Portland, and Auburn
This month in numbers
Maine experienced its 9th warmest June on record, with an average temperature of 17.06°C, which is 1.3°C above the 1961–1990 baseline. The maximum temperature for June was 23.39°C, ranking as the 14th warmest. Precipitation for the month was 115.57 mm, 23 mm above average, and ranked as the 21st wettest June. Globally, June 2026 was the 3rd warmest June for land temperatures on record, with an anomaly of +1°C.
What changed
Looking at the broader picture, the April–June 2026 period in Maine saw an average temperature of 10.72°C, ranking as the 17th warmest such period on record, with an anomaly of +0.8°C. Precipitation for this three-month span was 114.56 mm, ranking as the 15th wettest, with an anomaly of +24.2 mm. This trend of warmer and wetter conditions aligns with the global land temperature, which ranked as the 2nd warmest April–June on record, with an anomaly of +1°C. Maine's 1-month anomaly of +1.34°C places it 109th out of 234 regions globally, while its 3-month anomaly of +0.82°C ranks it 185th.
What’s driving change?
A weak El Niño is currently active, with a Niño 3.4 SST anomaly of +0.98°C for April–June 2026. Forecasts indicate a 100% probability of El Niño continuing through the end of 2026. Historically, El Niño typically brings warmer conditions to the Northeast USA during winter, with no clear precipitation signal. However, some projections suggest a warmer and wetter summer for Maine under a strong El Niño, with effects becoming more pronounced in the autumn and winter. The Gulf of Maine's ocean temperatures are also a significant driver of local weather. Maine has also experienced an unusual concentration of wildfires recently, with four events between late June and early July representing 100% of the annual total for the past 12 months, which is considered a normal total compared to previous years. You can track active extreme weather events at Extreme Weather tracker.
Looking ahead
With El Niño expected to strengthen and persist through the end of the year, Maine could see continued warmer and potentially wetter conditions, particularly as autumn and winter approach.
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 – Maine
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Maine – Monthly Temperature – All Years
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Maine
NOAA National Centers for Environmental Information - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfb · ContinentalHow spring and autumn have shifted in Maine. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (4.7°C, from 1950–1979); autumn is the date they fall back below it. Temperature swings 28.5°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Jan (+2.5°C).
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
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Maine
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 Maine changing?
Maine 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 Maine come from?
Climate data for Maine 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 Maine climate data cover?
The Maine climate profile covers Portland, Lewiston, Bangor, South Portland and surrounding areas. Maine climate data from NOAA Climate at a Glance
How often is the Maine climate update refreshed?
The Maine 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.