Editing Heidelberg (section)

===Climate===
Heidelberg has an [[oceanic climate]] ([[Köppen climate classification]] ''Cfb''), defined by the protected valley between the Pfälzerwald and the Odenwald. The almost year round warm temperatures are usually determined by [[Atlantic]] air masses in the winter and increased influence from the western [[Mediterranean]] in summer.
In contrast to the nearby [[Upper Rhine Plain]], Heidelberg's position in the valley leads to more frequent easterly winds than average. The hillsides of the Odenwald favor clouding and precipitation.

Spring starts earlier than the average in Germany (usually mid February in the recent years). While the weather in spring is typically warm, it is also known to  change far more often than in the summer.

Summer starts typically in June and stays until September. In this time the weather is typically stable, with single thunderstorms marking the only precipitation. Day temperatures of around 30 °C are typical, but can reach up to 40 °C during heat waves.

Autumn starts warm in September and cools down to typical winter temperatures for the region by the end of November. Precipitation levels begin to increase and, due to the decreasing sunlight, the region is affected by fog more frequently from the second part of October onwards.

Winters are mostly mild, though light nighttime frosts do occur in the coldest months. Snow is a rare event, and precipitation normally falls as rain. Winters are the wettest time of the year, with frequent western winds blowing from the Atlantic. Storms ("Orkane") can create severe damage, and the Neckar is often affected by floods.{{Citation needed|date=February 2024|reason=This paragraph is totally unreferenced.}}

According to the [[Deutscher Wetterdienst|German Meteorological Service]], Heidelberg was the warmest place in Germany in 2009.<ref>Mechthild Henneke: ''Wetterextreme in Deutschland 2009''. In: ''[[Südkurier]]'', 28. April 2010</ref><ref>''Kreisbeschreibung Bd. 1'', S. 54ff</ref><ref>{{Cite web|url=http://www.klimadiagramme.de/Deutschland/heidelberg2.html|title=Das Klima in Heidelberg|website=www.klimadiagramme.de}}</ref>

{{Weather box|width=auto
|metric first=y
|single line=y 
|collapsed = Y
|location =  Heidelberg (1991–2010 normals, extremes 1935–2012)
|Jan record high C = 16.2
|Feb record high C = 20.0
|Mar record high C = 25.4
|Apr record high C = 31.4
|May record high C = 34.0
|Jun record high C = 38.1
|Jul record high C = 39.5
|Aug record high C = 38.8
|Sep record high C = 34.7
|Oct record high C = 28.5
|Nov record high C = 21.4
|Dec record high C = 18.5
|Jan record low C = -26.0
|Feb record low C = -21.5
|Mar record low C = -12.0
|Apr record low C = -5.0
|May record low C = -1.1
|Jun record low C = 3.5
|Jul record low C = 6.0
|Aug record low C = 5.7
|Sep record low C = 0.7
|Oct record low C = -3.2
|Nov record low C = -7.6
|Dec record low C = -18.8
|Jan high C = 5.1
|Feb high C = 7.0
|Mar high C = 11.5
|Apr high C = 16.4
|May high C = 20.7
|Jun high C = 24.0
|Jul high C = 26.0
|Aug high C = 25.7
|Sep high C = 20.8
|Oct high C = 15.3
|Nov high C = 9.3
|Dec high C = 5.4
| year high C = 
|Jan mean C = 2.6
|Feb mean C = 3.9
|Mar mean C = 7.5
|Apr mean C = 11.4
|May mean C = 15.7
|Jun mean C = 18.7
|Jul mean C = 20.7
|Aug mean C = 20.2
|Sep mean C = 16.0
|Oct mean C = 11.4
|Nov mean C = 6.6
|Dec mean C = 3.2
| year mean C = 
|Jan low C = 0.0
|Feb low C = 0.9
|Mar low C = 3.7
|Apr low C = 6.5
|May low C = 10.6
|Jun low C = 13.5
|Jul low C = 15.7
|Aug low C = 15.2
|Sep low C = 11.5
|Oct low C = 7.9
|Nov low C = 4.0
|Dec low C = 0.8
| year low C = 
|precipitation colour = green
|Jan precipitation mm = 43.6
|Feb precipitation mm = 48.5
|Mar precipitation mm = 56.7
|Apr precipitation mm = 46.9
|May precipitation mm = 71.5
|Jun precipitation mm = 65.7
|Jul precipitation mm = 80.1
|Aug precipitation mm = 66.0
|Sep precipitation mm = 57.0
|Oct precipitation mm = 62.1
|Nov precipitation mm = 64.9
|Dec precipitation mm = 60.7
|year precipitation mm = 
|unit precipitation days = 0.1 mm
| Jan precipitation days = 14.4
| Feb precipitation days = 14.2
| Mar precipitation days = 15.0
| Apr precipitation days = 12.8
| May precipitation days = 13.9
| Jun precipitation days = 13.4
| Jul precipitation days = 14.9
| Aug precipitation days = 13.5
| Sep precipitation days = 13.0
| Oct precipitation days = 14.4
| Nov precipitation days = 16.7
| Dec precipitation days = 17.0
| year precipitation days =
|Jan sun = 46.0
|Feb sun = 78.2
|Mar sun = 118.0
|Apr sun = 173.3
|May sun = 206.0
|Jun sun = 214.6
|Jul sun = 233.1
|Aug sun = 218.5
|Sep sun = 157.6
|Oct sun = 101.4
|Nov sun = 50.8
|Dec sun = 35.5
|year sun = 1633.0
|Jan humidity = 78.5
|Feb humidity = 75.2
|Mar humidity = 69.3
|Apr humidity = 63.5
|May humidity = 65.2
|Jun humidity = 64.8
|Jul humidity = 64.5
|Aug humidity = 65.7
|Sep humidity = 71.6
|Oct humidity = 77.0
|Nov humidity = 81.1
|Dec humidity = 80.9
|source 1 = SKlima<ref name=sklima>{{cite web 
|url = http://sklima.de/datenbank_auswertung.php?tab=2
|title = Monatsauswertung 
|website = sklima.de 
|publisher = SKlima 
|language = de 
|access-date = 12 December 2024}}</ref>
|source 2 = Wetterzentrale<ref name= wetterzentrale1>{{cite web
|url = https://www.wetterzentrale.de/extremes_mon.php?station=2080&maand=1&country=1&order=1&extreem=X_TX
|title = Monthly records - Tagesmaximum Temp. (Heidelberg)
|publisher = DWD
|language = de
|access-date = 12 December 2024}}</ref><ref>{{cite web
|url = https://www.wetterzentrale.de/extremes_mon.php?station=2080&maand=1&country=1&order=1&extreem=X_TN
|title = Monthly records - Tagesminimum Temp. (Heidelberg)
|publisher = DWD
|language = de
|access-date = 12 December 2024}}</ref>[[Deutscher Wetterdienst]] (sun 1981–2010)<ref name=DWD2>{{Cite web
|url=https://www.dwd.de/DE/leistungen/klimadatendeutschland/mittelwerte/sonne_8110_SV_html.html;jsessionid=F239C744A75363793A2A04DC1657A986.live21071?view=nasPublication&nn=16102
|title= Sonnenscheindauer: vieljährige Mittelwerte 1981-2010
|website=www.dwd.de
|access-date=29 September 2024}}</ref>
}}