[{"_id":"some_id","temp_f":65.8,"current_observation":{"rain_day_in":0,"soil_moisture_1":0,"soil_moisture_1_day_high":0},"date":"12/23/2021","date_and_time":"2021-12-23T20:34:21"}]

db.collection.find({},{"temp_f":1,"rain_day_in":"$current_observation.rain_day_in","soil_moisture_1":"$current_observation.soil_moisture_1","soil_moisture_1_day_high":"$current_observation.soil_moisture_1_day_high","date":1,"_id":0})