Editing Bochum (section)

===Climate===
Bochum features an [[Oceanic climate]] ([[Köppen climate classification|Köppen]]: ''Cfb''; [[Trewartha climate classification|Trewartha]]: ''Dobk'') characterized by cool winters and short warm summers. Extreme temperatures are uncommon. However, temperatures rising above 30&nbsp;°C (86&nbsp;°F) are to be expected on multiple days in summer and the climate station closest to the City did record a peak temperature of 40&nbsp;°C<ref name=":0">{{Cite web|title=Klima Bochum|url=https://www.wetterdienst.de:443/Deutschlandwetter/Bochum/Klima/|access-date=2021-01-10|website=Wetterdienst.de|language=de}}</ref> (104&nbsp;°F) on July 25, 2019.

On the other extreme, freezing temperatures are common between mid-November and late March. In some years, however, frosts may occur as late as early May. Temperatures below −10&nbsp;°C are, especially in recent years, only seen on rare occasions. The city lies within the warmer extent of the 8a [[Hardiness zone|USDA plant hardiness zone]]<ref>{{Cite web|title=USDA-Karte der Klima- und Winterhärte-Zonen in Deutschland – Garten & Pflanzen News – GREEN24 Hilfe Pflege Bilder|url=https://green-24.de/forum/usda-karte-der-klima-und-winterhaerte-zonen-in-deutschland-t51878.html|access-date=2021-01-23|website=green-24.de}}</ref> (−12.2 to −9.4&nbsp;°C or 10 to 15&nbsp;°F). Some winters may pass without a frost below −5&nbsp;°C <ref>{{Cite web|title=Rückblick für Essen – WetterKontor|url=https://www.wetterkontor.de/de/wetter/deutschland/rueckblick.asp?id=55&datum0=26.12.2020&datum1=22.01.2021&jr=2021&mo=1&datum=22.01.2020&t=4&part=2|access-date=2021-01-23|website=Wetterkontor.de}}</ref> (data from the nearest active climate station). These comparably mild conditions in Winter permit the planting of plants that would either not be reliably hardy or not able to bloom throughout Germany like ''[[Trachycarpus]]'' palms, [[Buddleja davidii|Summer lilac]], ''[[Paulownia tomentosa]]'' and [[Rosemary]].

However, winters can be unpredictable with strong fluctuations in temperatures: In mid-February 2021, the city was affected by a severe cold spell bringing temperatures down to –15 degrees Celsius (5&nbsp;°F) accompanied by heavy snowfall which hindered traffic<ref>{{Cite web|last=Kiesewetter|first=Bernd|date=2021-02-07|title=Wintereinbruch in Bochum: Müllabfuhr wird nicht garantiert|url=https://www.waz.de/staedte/bochum/feuerwehr-bochum-warnt-vor-glaette-bitte-seid-vorsichtig-id231498079.html|access-date=2021-02-20|website=Waz.de|language=de-DE}}</ref> for multiple days. A week later, a temperature of 17&nbsp;°C (63&nbsp;°F) was recorded,<ref>{{Cite web|title=Rückblick für Essen - WetterKontor|url=https://www.wetterkontor.de/de/wetter/deutschland/rueckblick.asp?id=55|access-date=2021-02-25|website=Wetterkontor.de}}</ref> an increase of 32K.

The total precipitation of 815mm<ref name=":0" /> is distributed relatively evenly through most of the year but has a peak in winter and two minima in late spring and July, respectively.<ref name=":0" /> June shows a second peak in precipitation due to the [[Monsoon#Europe|return of the westerlies]] which leads to more thunderstorms being generated along frontal boundaries of Atlantic low-pressure systems. In recent years, the city was affected by summer and spring droughts. Thunderstorms are not uncommon in the warm season and can generate intense downpours and sporadically hail.

The city experiences little sunshine in winter with a minimum of 1,3h per day in December and a lot more in early summer and late spring with May featuring 7,5h per day. The total amount of sunshine per year is 1689h.<ref name=":0" />

Due to the cities northern latitude of 51°N, seasonal day-length variation is significant. The longest day of the year, June 21, features 16 h 38 min. of daylight while the shortest day of the year which is December 21 is only 7 h and 50 min. long.

{{Weather box
|width = auto
|metric first = y
|single line = y
|location = Bochum (1991–2020 normals, extremes 1940–present)
|Jan record high C = 16.6
|Feb record high C = 19.0
|Mar record high C = 23.7
|Apr record high C = 28.5
|May record high C = 32.1
|Jun record high C = 36.3
|Jul record high C = 36.0
|Aug record high C = 37.3
|Sep record high C = 33.5
|Oct record high C = 27.4
|Nov record high C = 21.6
|Dec record high C = 17.9
|Jan avg record high C = 12.6
|Feb avg record high C = 12.5
|Mar avg record high C = 18.7
|Apr avg record high C = 23.8
|May avg record high C = 27.6
|Jun avg record high C = 30.3
|Jul avg record high C = 32.8
|Aug avg record high C = 32.2
|Sep avg record high C = 28.2
|Oct avg record high C = 22.6
|Nov avg record high C = 16.7
|Dec avg record high C = 12.4
|year avg record high C = 34.2
|Jan high C = 5.8
|Feb high C = 5.7
|Mar high C = 10.6
|Apr high C = 15.1
|May high C = 19.4
|Jun high C = 21.7
|Jul high C = 24.4
|Aug high C = 23.7
|Sep high C = 19.8
|Oct high C = 14.6
|Nov high C = 9.6
|Dec high C = 6.4
|year high C = 14.7
|Jan mean C = 3.3
|Feb mean C = 2.8
|Mar mean C = 6.5
|Apr mean C = 10.1
|May mean C = 14.0
|Jun mean C = 16.6
|Jul mean C = 18.9
|Aug mean C = 18.2
|Sep mean C = 14.5
|Oct mean C = 10.5
|Nov mean C = 6.8
|Dec mean C = 4.0
|year mean C = 10.5
|Jan low C = 0.7
|Feb low C = -0.2
|Mar low C = 2.3
|Apr low C = 4.7
|May low C = 8.1
|Jun low C = 11.1
|Jul low C = 13.4
|Aug low C = 12.8
|Sep low C = 9.9
|Oct low C = 6.7
|Nov low C = 3.9
|Dec low C = 1.5
|year low C = 6.2
|Jan avg record low C = -7.4
|Feb avg record low C = -7.3
|Mar avg record low C = -4.1
|Apr avg record low C = -1.6
|May avg record low C = 1.0
|Jun avg record low C = 5.7
|Jul avg record low C = 8.0
|Aug avg record low C = 7.5
|Sep avg record low C = 4.5
|Oct avg record low C = -0.1
|Nov avg record low C = -3.3
|Dec avg record low C = -6.3
|year avg record low C = -10.3
|Jan record low C = -20.3
|Feb record low C = -17.3
|Mar record low C = -12.3
|Apr record low C = -5.4
|May record low C = -1.4
|Jun record low C = 2.5
|Jul record low C = 5.1
|Aug record low C = 5.5
|Sep record low C = 0.8
|Oct record low C = -4.5
|Nov record low C = -7.1
|Dec record low C = -17.1
|precipitation colour = green
|Jan precipitation mm = 73.8
|Feb precipitation mm = 46.0
|Mar precipitation mm = 53.4
|Apr precipitation mm = 38.1
|May precipitation mm = 51.9
|Jun precipitation mm = 79.2
|Jul precipitation mm = 93.6
|Aug precipitation mm = 84.2
|Sep precipitation mm = 65.4
|Oct precipitation mm = 63.3
|Nov precipitation mm = 78.8
|Dec precipitation mm = 85.9
|year precipitation mm = 813.7
|unit precipitation days = 1.0 mm
|Jan precipitation days = 18.1
|Feb precipitation days = 16.2
|Mar precipitation days = 15.1
|Apr precipitation days = 13.7
|May precipitation days = 13.7
|Jun precipitation days = 15.2
|Jul precipitation days = 16.1
|Aug precipitation days = 15.9
|Sep precipitation days = 13.4
|Oct precipitation days = 16.1
|Nov precipitation days = 18.8
|Dec precipitation days = 20.6
|year precipitation days = 193.0
|Jan snow depth cm = 4.9
|Feb snow depth cm = 2.7
|Mar snow depth cm = 0.9
|Apr snow depth cm = 0
|May snow depth cm = 0
|Jun snow depth cm = 0
|Jul snow depth cm = 0
|Aug snow depth cm = 0
|Sep snow depth cm = 0
|Oct snow depth cm = 0
|Nov snow depth cm = 0.5
|Dec snow depth cm = 4.5
|year snow depth cm = 9.6
|humidity colour = green
|Jan humidity = 83.9
|Feb humidity = 80.7
|Mar humidity = 74.9
|Apr humidity = 70.7
|May humidity = 70.8
|Jun humidity = 73.3
|Jul humidity = 72.8
|Aug humidity = 74.3
|Sep humidity = 79.5
|Oct humidity = 82.8
|Nov humidity = 84.6
|Dec humidity = 85.9
|year humidity = 77.9
|Jan sun = 52.8
|Feb sun = 70.3
|Mar sun = 125.6
|Apr sun = 167.1
|May sun = 183.6
|Jun sun = 177.4
|Jul sun = 202.3
|Aug sun = 191.0
|Sep sun = 144.1
|Oct sun = 107.4
|Nov sun = 59.1
|Dec sun = 42.0
|year sun = 1522.7
|source 1 = [[Deutscher Wetterdienst]]/SKlima.de<ref>{{cite web 
|url = http://sklima.de/datenbank_auswertung.php?tab=2
|title = Monatsauswertung 
|website = sklima.de 
|publisher = SKlima 
|language = de 
|access-date = 28 October 2024}}</ref>}}