Perceived temperature 2022
View on the mapPhysiological Equivalent Temperature (PET) as a measure of perceived heat stress on a summer day at 2 pm. Takes air temperature, radiation, wind and humidity into account. The map covers built-up areas, street space and green spaces. Water bodies such as lakes and canals have no PET value and stay empty. Source: Berlin Climate Analysis 2022.
Kieze compared
Perceived temperature on hot days at 2 pm (Climate Analysis 2022). The values appear side by side without judgement.
Source
- Provider
- gdi.berlin.de
- Licence
- dl-de/zero
- Data as of
- June 2024
- Objects
- 57,801
Values
- Unit
- °C
- Scale
- below 32 °C neutral, 32 to 41 °C warm to hot, above 41 °C extremely hot
Calculation
Physiological Equivalent Temperature (PET) on a hot day at 2 pm from the Berlin Climate Analysis 2022. Modelled on a 10 × 10 metre grid, reduced to polygon geometry here.
- Aggregation
- City block
- Maintenance
- Senate Department for Urban Mobility, Transport, Climate Action and the Environment, Berlin Environmental Atlas (Umweltatlas)
- Update frequency
- irregularly (last in 2022, previously 2015)
Gaps in coverage
- Not all urban areas are modelled. If an address lies up to 50 m from a modelled area, for example at a block edge, we show that area’s value.
Not included
- Night-time values are reported separately.
Related layers
Frequently asked questions
PET is a bioclimatic indicator. It states which air temperature in an enclosed room would correspond to the perceived temperature outdoors. Wind, humidity and radiation feed into it. The value is suited to comparing heat stress across urban areas.
The German Weather Service (Deutscher Wetterdienst) counts a day with a maximum temperature of 30 degrees Celsius or more as a hot day. The number of hot days per year in Berlin has risen markedly since the 1990s, as documented in the 1991-2020 climate normal period.
A climate normal period is a 30-year reference period that the World Meteorological Organization uses to make weather averages comparable. For Berlin, we use the current period 1991-2020 as the basis for comparison.
Asphalt and stone store heat and release it again at night. Heavily sealed neighbourhoods cool down less well than neighbourhoods with vegetation or open water. The urban climate analysis treats sealing as one factor among several.