ClimateObservatory

NASA · NOAA · ECAD CO2

Official climate data — from your nearest weather station to global climate trends.

Official long-run weather station records (NOAA, ECAD) linked to city pages | NASA GISTEMP global land temperature anomalies | Mauna Loa atmospheric CO₂ (NOAA) | fossil CO₂ emissions context from the Global Carbon Project and ODIAC.

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TemperatureGlobal land temperature anomalies

+1.99°C

Year-to-date mean · 2026 Jan–Aug 2026

· Baseline 1901-1930

NASA GISTEMP · land

GISS Surface Temperature Analysis (GISTEMP) — global land monthly mean (NASA graph, rebased 1901-1930) · NASA Goddard Institute for Space Studies (GISS) · NASA GISS · Fetched Sep 14, 2026, 7:00 AM UTC

Annual anomalies · global land series

Source: NASA GISTEMP data— GISS Surface Temperature Analysis (GISTEMP) — global land monthly mean (NASA graph, rebased 1901-1930)

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Source: NOAA GML CO₂ data— NOAA · Global Monitoring Laboratory · Mauna Loa, Hawaii, USA

Search your city’s temperature

Official long-run station records — type a city below.

Or jump to an example: Paris.

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Browse stations worldwide and open a city page from the map.

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Official data on global warming and local climate

ClimateObservatory.org combines trusted public datasets so you can compare planetary warming with what is measured near the cities and regions you care about. Global land temperature anomalies come from NASA’s GISTEMP analysis. Long records from individual weather stations are drawn from NOAA (with especially deep coverage in the United States) and from ECAD, the European Climate Assessment & Dataset network.

Atmospheric carbon dioxide is shown using the Keeling Curve record from Mauna Loa (NOAA / Scripps). Dedicated views also place fossil-fuel CO₂ in context with the Global Carbon Project and the ODIAC gridded emissions inventory. For thousands of cities worldwide we link station metadata to annual mean temperature series so you can explore trends where people actually live—not only global averages.

Explore the data

City climate pages

Each page shows annual mean temperatures from nearby stations, with charts and links to raw JSON where available.

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Frequently asked questions

Which organizations provide the data on ClimateObservatory.org?
We use NASA GISTEMP for global land temperature anomalies, NOAA station files for many locations (especially North America), and ECAD for European stations. CO₂ figures follow the Mauna Loa record published by NOAA’s Global Monitoring Laboratory (and related references such as Scripps).
How do city pages relate to weather stations?
Each city page lists one or more stations (NOAA or ECAD) associated with that place. Charts plot the station’s annual mean temperature series; the page explains coverage years and links to the underlying dataset files.
What is the difference between global temperature and a city chart?
GISTEMP describes how global (or large-scale) land averages evolve relative to a baseline. A city chart shows the record at specific observing sites near that city—useful for local context but not identical to an official “city average” product from a single agency.
Why does atmospheric CO₂ matter for climate change?
CO₂ is a long-lived greenhouse gas. Rising concentrations from fossil fuel use and land-use change trap more heat in the climate system; Mauna Loa provides one of the clearest long-term records of that increase.
Can I download or cite the data?
Yes. Station pages link to JSON (and related formats) under /datasets/… following the same patterns as the original agencies. Please cite NASA, NOAA, ECAD, or GML as appropriate when reusing their data.

Major city temperature charts

Annual mean temperatures from the primary weather station near each featured city — Paris, Berlin, New York, Sydney, and more.

Use search or the map for more cities.