Państwa w Europie, Wielka Brytania – J
- Jack Hill 4°C
- Jackstown 3,2°C
- Jackton 3,6°C
- Jacobs Well -0,5°C
- Jacobstow 6,6°C
- Jacobstowe 4,7°C
- Jameston 7°C
- Jamestown 2,7°C
- Jamestown 3,4°C
- Jamestown 3,3°C
- Janefield 2,8°C
- Jarrow 6,4°C
- Jarvis Brook -0,9°C
- Jawcraig 3,8°C
- Jayes Park -1,3°C
- Jaywick 1,5°C
- Jealott's Hill -0,4°C
- Jedburgh 4,9°C
- Jeffreyston 7°C
- Jemimaville 2,8°C
- Jerrettspass 3,2°C
- Jersay 3,1°C
- Jevington 1,2°C
- Jewell's Cross 6,6°C
- Jockey End 0,2°C
- Jodrell Bank 3,8°C
- John O' Groats 2,8°C
- John O'gaunt 3°C
- Johnby 3,7°C
- John's Cross -0,7°C
- Johnshaven 2,7°C
- Johnston 9,5°C
- Johnstone 3,9°C
- Johnstonebridge 4,7°C
- Jonesborough 3,7°C
- Jordans 0,2°C
- Jordanston 6,3°C
- Jump 4,6°C
- Juniper 5,1°C
- Juniper Green 3,3°C
- Juniper Hill 0,7°C