Iran Climate – June 2026 Update
Top 5 Cities: Tehran, Mashhad, Isfahan, Karaj, and Shiraz
This month in numbers
Iran experienced its warmest April-June period on record, with an average temperature of 25.98°C, an anomaly of +3.8°C compared to the 1961–1990 baseline. This marks the 1st warmest such period in 86 years of records. Globally, land temperatures for April-June 2026 ranked as the 2nd warmest on record, with an anomaly of +1°C. June 2026 in Iran saw an average temperature of 28.91°C, an anomaly of +1.6°C, ranking as the 15th warmest June on record.
What changed
The past three months have seen Iran significantly warmer than its historical average, with the April-June period setting a new record. This trend places Iran as the 6th warmest country globally for the 3-month anomaly, with a +3.75°C difference from the baseline. The country's 12-month rolling anomaly of +2.67°C also places it as the 19th warmest globally, highlighting a persistent warming trend. Iran's warming is more pronounced than the average for the Asia group, with its June anomaly being 0.06°C warmer than the group average.
What’s driving change?
The significant warming observed in Iran is driven by several factors, including the broader global warming trend and regional influences. Iran's climate is largely continental, with hot, dry summers and cold winters, and approximately 88 percent of the country is arid or semi-arid. The long-term trend shows Iran has warmed by around 2°C since the 1950s, with an increase of approximately 0.3°C per decade since then. This warming is exacerbated by , as arid regions struggle to cool themselves through evaporation. Additionally, the effect is contributing to elevated temperatures in cities due to concrete, asphalt, and low vegetation. Iran is also a significant contributor to greenhouse gas emissions, ranking 8th worldwide and 1st in the Middle East and North Africa region, primarily due to its reliance on oil and natural gas. A flash flood was reported in Marand, Iran, on June 26, 2026.
Looking ahead
The evolving El Niño–Southern Oscillation (ENSO) phase may continue to influence temperature and rainfall patterns in the coming months, with warm ENSO events sometimes associated with wetter rainy seasons in Iran.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Year-on-Year Trends
The 4byo Climate Helix – Iran
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Iran – Monthly Temperature – All Years
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Iran
Our World in Data / NOAA - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm/cold + wet/dryKöppen BSk · AridIran has both a clear warm/cold cycle (±12.5°C) and a wet/dry cycle (10× 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 (-10 mm, -25%).
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Precipitation
Rainfall & Rain Days – Totals
Headline: anomaly vs the 1961–1990 mean. Small figure: the actual value. Rank: position in the full record (1st = highest ever). Record: highest (or lowest) value on record with its year.
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Iran
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 Iran changing?
Iran 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 Iran come from?
Climate data for Iran comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), 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 Iran climate data cover?
The Iran climate profile covers Tehran, Mashhad, Isfahan, Karaj and surrounding areas. Temperature, rainfall and emissions data for Iran
How often is the Iran climate update refreshed?
The Iran 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.