I am curious what the relative operating humidity of the RasPi is. There is a lot of information about measuring humidity with the RasPi, but I haven't come across any information about the max operating humidity of the RasPi is.

Any help is appreciated!

1 Answer 1


According to this graph (Instructables Image), it commonly runs around 80% to 90% at normal.

Temp. C / Orange Temperature / Humidity

Here's the original project that measures the temperature and humidity. It should be step 9: Instructables.

The GitHub repo for the code can be found at: jervine/rpi-temp-humid-monitor

  • If would be good if you could provide a context for that .jpg graph. As it appears right now, it may or may not actually have anything to do with the pi.
    – goldilocks
    Mar 10, 2016 at 20:11
  • I'll update the link, the only reason I didn't was because it was a step-by-step humidity meter for the Pi. @goldilocks
    – Dylan
    Mar 10, 2016 at 20:14
  • Although it commonly running "at 20-40%" makes sense, since that is low to normal atmospheric humidity most places, I think your conclusion that "80%" is the max is incorrect. I think that was the highest reading from a temp/humidity monitoring station build using a pi, but the purpose of the monitoring was not to protect the pi itself. I'd guess it should be okay above 80 or 90% humidity since this is not all that unusual some places (just not around here, so I don't know for sure).
    – goldilocks
    Mar 10, 2016 at 20:24
  • I completely understand what you are getting to. I'd say the same now that I think about it, so I'll update the post.
    – Dylan
    Mar 10, 2016 at 20:26
  • 2
    A lot of our Pi's are located in open buildings (pillars with a roof on top). Weather.com tells me dry season months have ~75% humidity, others ~85%. Data shows it peaked to 96% a couple days ago. On top of that we have quite some beachfront venue installations. Metal parts (LAN+USB) might get a little bit oxidized but haven't seen any issues really.
    – EDP
    Mar 11, 2016 at 11:37

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