Iran Climate
Top 5 Cities: Tehran, Mashhad, Isfahan, Karaj, and Shiraz
This month in numbers
Iran experienced its warmest April on record in 2026, with an average temperature of 21.99°C, a significant 5.2°C above the 1961–1990 baseline. This makes it the 1st warmest April in 86 years of records. Globally, April 2026 was the 2nd warmest April for land temperatures, with an anomaly of +1.1°C.
What changed
The past three months (February–April 2026) saw Iran record its 7th warmest such period on record, with an average temperature of 14.4°C, which is 3.2°C above the 1961–1990 average. This warming trend in Iran is notably higher than the broader Asian regional average, with Iran's 1-month anomaly being 3.46°C warmer than its group average. Iran also ranked as the 2nd warmest country globally for the latest month's temperature anomaly.
What’s driving change?
The significant warming observed in Iran is influenced by the broader global warming trend, with land warming faster than the ocean. Iran has been experiencing a prolonged drought since 2021, which can contribute to , further intensifying heat. Although recent heavy rainfall has brought some relief and refilled dams in certain areas, the country is still grappling with a significant water deficit, particularly in densely populated regions like Tehran. This drought is considered an unusual concentration, representing 100% of the drought events logged for Iran over the past 12 months. More information on active extreme weather events can be found at Extreme Weather tracker.
Looking ahead
Seasonal forecasts for April–June 2026 suggest wetter-than-average conditions for the Middle East and Central Asia, which may offer some relief to the ongoing drought conditions, though the humanitarian consequences of five years of drought are still unfolding.
Generated by Gemini from climate data and web sources
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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 trend rate is shown as °C per decade in the headline panel; you can also see 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.