Wetterstationen des Deutschen Wetterdienstes (DWD)
| Stationsname (Ort) | Seehöhe | Bundesland |
| Jena-Isserstedt | 325 m | TH |
| Jennewitz-Diedrichshagen | 105 m | MV |
| Jennewitz-Diedrichshagen (Ph) | 105 m | MV |
| Jerchel | 60 m | ST |
| Jerchel/Altmark | 60 m | ST |
| Jerichow | 30 m | ST |
| Jerichow | 20 m | ST |
| Jerischke | 130 m | BB |
| Jersleben | 41 m | ST |
| Jerxen-Orbke | 130 m | NW |
| Jesewitz | 127 m | SN |
| Jeßnitz | 74 m | ST |
| Jessen | 72 m | ST |
| Jessen (Elster)-Naundorf | 100 m | ST |
| Jessen-Gentha | 75 m | ST |
| Jessen/Elster | 77 m | ST |
| Jessenitz | 13 m | MV |
| Jestädt | 160 m | HE |
| Jestetten | 430 m | BW |
| Jettenbach | 403 m | BY |
| Jevenstedt (PH) | 6 m | SH |
| Jevenstedt-Schwabe | 10 m | SH |
| Jever | 7 m | NI |
| Jever | 3 m | NI |
| Joachimsthal (Beob.-Stelle 1) | 75 m | BB |
| Joachimsthal (Beob.-Stelle 2) | 75 m | BB |
| Jocketa-Trieb | 360 m | SN |
| Johannesberg-Oberafferbach | 335 m | BY |
| Johanngeorgenstadt | 780 m | SN |
| Johannisberg | 160 m | HE |
| Johanniskirchen | 360 m | BY |
| Johanniskreuz | 472 m | RP |
| Jöhstadt | 715 m | SN |
| Jöhstadt (PH) | 780 m | SN |
| Joldelund | 20 m | SH |
| Joldelund | 20 m | SH |
| Jonsdorf | 450 m | SN |
| Jonsdorf, Kurort | 434 m | SN |
| Jördenstorf | 45 m | MV |
| Jork | 1 m | NI |
| Jork-Moorende | 1 m | NI |
| Jork/Niederelbe | 1 m | NI |
| Jossgrund-Pfaffenhausen | 355 m | HE |
| Jostal | 850 m | BW |
| Jübar | 90 m | ST |
| Jübek | 15 m | SH |
| Jüchen | 75 m | NW |
| Jüchen-Dyck (Schloß) | 60 m | NW |
| Jückelberg-Flemmingen | 235 m | TH |
| Jüdendorf | 208 m | ST |