Current meteorological data | |
Air temperature: | 59 (°F) |
15.0 (°C) | |
Wind speed: | 4 (km/h) |
Wind direction: | N-N-O, 31.4 ° |
Global radiation: | 305.0 (W/m²) |
Act. UV-Index: | 0 |
Precipitation: | 0.0 (ltr/m²) |
(Updated: 10/30/2024, 11:30, S-Mitte, Amt für Umweltschutz |
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Determining factors of the urban heat balance (according to ROBEL et al., 1978) |
Determining factors | Difference compared to the undeveloped surrounding region |
Global radiation (horizontal surface) | up to -10 % |
Albedo | +/- |
Counter radiation | up to +10 % |
UV radiation
- in summer - in winter |
up to -5 % up to -30 % |
Hours of sunshine
- in summer - in winter |
up to -8 % up to -10 % |
Sensitive heat flow | up to +50 % |
Heat retaining capacity in subsoil and buildings | up to +40 % |
Air temperature
- annual average - minimum temperature in winter - in individual cases |
about +2 K about +10 K about +15 K |
Wind
- speed - gust direction - gust speed |
up to -20 % tremendous variations increased |
Humidity | +/- |
Fog
- city - town |
less more |
Precipitation
- rain - snow - dew |
more (on the lee side) less less |
Air pollutants
CO, NOx, AVOC1), PAN2) O3 |
more less (higher maximum |
Bioclimate
- vegetation season |
up to 10 days longer |
Length of frost period | up to -30 % |
1) = man-made hydrocarbons 2) = ) peroxyacetyl nitrate |
Increased pollution of the air due to temperature inversion |
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© City of Stuttgart, Office for Environmental Protection, Section of Urban Climatology |