Just wanted to share my vegetable garden situation. I made cold frames this year to keep the lettuce, broccoli, and carrots going through the cold months and to protect them from frost/snow damage.
Decided to put a couple Zooz XS temp+humidity sensors to monitor what's going on:
And have been plotting the data with influx+Grafana:
Temperature stays the same except during the hottest part of the day, when it spikes 20 degrees hotter under full sun. It's definitely good to monitor this during unseasonably warm days, because the temperature was over 100F on occasion while it was 70F outside.
Humidity stays 15-20% higher than the outside, which is proving to be fantastic for growing. Every time I open the beds the humidity drops of course, but it recovers quickly.
With some luck, I'll have broccoli heads before Winter. 
