Wetterstationen des Deutschen Wetterdienstes (DWD)
| Stationsname (Ort) | Seehöhe | Bundesland |
| Massenbachhausen | 220 m | BW |
| Masserberg | 763 m | TH |
| Massing | 430 m | BY |
| Massow | 75 m | MV |
| Mastershausen | 380 m | RP |
| Matzenberg | 530 m | BY |
| Mauer | 140 m | BW |
| Maukendorf | 126 m | SN |
| Maulbronn | 250 m | BW |
| Mauth | 811 m | BY |
| Mauth-Finsterau | 1011 m | BY |
| Maximiliansau | 100 m | RP |
| Mayen | 230 m | RP |
| Mayen (DLR RLP) | 275 m | RP |
| Mayen (PH) | 240 m | RP |
| Mayen-Hausen | 230 m | RP |
| Mayschoß (DLR RLP) | 140 m | RP |
| Mechelroda | 350 m | TH |
| Mechernich-Berg | 260 m | NW |
| Mechernich-Glehn (WV NRW) | 258 m | NW |
| Mechernich-Harzheim (WV NRW) | 356 m | NW |
| Mechtersen | 20 m | NI |
| Mechtersen (PH) | 20 m | NI |
| Meckbach | 210 m | HE |
| Meckenheim | 110 m | RP |
| Meckesheim | 140 m | BW |
| Medard | 160 m | RP |
| Meddersheim (DLR RLP) | 160 m | RP |
| Medebach | 410 m | NW |
| Medebach-Berge | 375 m | NW |
| Medebach-Küstelberg | 660 m | NW |
| Medelby | 30 m | SH |
| Medenbach | 210 m | HE |
| Medewitz | 140 m | BB |
| Medewitz-Medewitzerhütten | 140 m | BB |
| Medingen | 24 m | NI |
| Medow-Wussentin | 11 m | MV |
| Meeder | 320 m | BY |
| Meeder-Ottowind | 450 m | BY |
| Meerane | 260 m | SN |
| Meerbeck | 60 m | NI |
| Meerhof | 410 m | NW |
| Meersburg | 460 m | BW |
| Meetschow | 18 m | NI |
| Meezen | 20 m | SH |
| Megesheim | 438 m | BY |
| Mehle | 95 m | NI |
| Mehlsdorf | 85 m | BB |
| Mehltheuer | 496 m | SN |
| Mehren | 500 m | RP |