This chart shows the monthly temperature variations relative to the 1961–1990 baseline for the last 5 years. Each row represents one year, with 12 months on the horizontal axis. The position on the Z axis (vertical) and the colour indicate temperature anomalies:
This visualisation helps to identify long-term warming trends and seasonal temperature patterns, allowing users to see in which month warming is most pronounced and how the thermal pattern changes month by month over the last few years.
The calculation is based on Open-Meteo Historical Weather data (ERA5-Land reanalysis, ~10 km, 1940–present):
Colouring:
| Anomaly | Colour |
|---|---|
| < 0 °C (cooler) | Blue |
| ≈ 0 °C (near average) | Yellow |
| > 0 °C (warmer) | Red |
Unit: degrees Celsius (°C, anomaly relative to the 1961–1990 baseline)
| Code | Name | Provider | Resolution | Availability |
|---|---|---|---|---|
WRD_OPNMT_99 | Open-Meteo Historical Weather | Open-Meteo (ERA5-Land) | ~10 km | 1940 — present |
This KPI is a 3D visualisation of monthly thermal anomalies and does not include an A–E quality level classification. It is an exploratory tool for identifying seasonal patterns and monthly warming trends over time, complementary to the annual Warming Stripes. Interpretation is direct: the intensity of the red colour indicates the magnitude of warming relative to the historical baseline.
Monthly temperature anomalies relative to the 1961–1990 baseline for the last 5 years. Source: Open-Meteo Historical Weather (ERA5-Land reanalysis, ~10 km, 1940–present). Calculation: monthly mean temperature for the last 5 years → 1961–1990 reference mean (WMO standard) → monthly anomaly = T(month, year) − historical mean(month). 3D visualisation: X axis = months (Jan–Dec), Y axis = years, Z axis and colour = anomaly (°C). Colouring: blue=cold, yellow=neutral, red=warm.