The next logical step for using sensors, in this case LM35 and DS18B20 temperature sensors, is to shield them somehow from elements. I am not very comfortable installing a bare sensor outside, into the rain for example.
Some kind of small metal pipe should bee good enough. I did find some electric cable connectors for a thick power cable in local hardware store.
I used some plasticine like stuff, which hardens in about an hour and is intended for emergency car repairs, to plug one end of that tube.
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