IP67 Temperature sensor recomendations?

Greetings. We have been monitoring our snowmelt system with home-brewed sensors for a few years now. It’s time to retire the hardware and replace it with a more robust, commercially available option. I’m seeking advice from you. What are your suggestions?

TTN compatible Lora
Temperature probe on a cable for inserting into sidewalk
Long battery life (all winter), and easily battery replacement/recharge.
IP67 waterproof.

Thanks for your opinion!

What the heck is snowmelt, you say? Feel free to dive in at our community page: Holland, Michigan - The Things Network Community

SHT31/35/41/45 are very accurate sensors and as IP68(?) version available. but they are not cheap then.
cheap ones are ds18b20..but not very accurate

so something like will do:

https://electronics.semaf.at/agrosense-lorawan-temperatur-feuchtigkeitssensor-sht31-ip68-868mhz

similar cam purchased from dragino.