The dew point calculation doesn't seem to be working on my Cumulus installation.
I've just installed a humidity sensor onto my Instromet station, and outdoor temperature and outdoor humidity readings are both making their way to Cumulus MX from my station - but the dew point doesn't seem right?
Attached image shows Outdoor Temp of 22.1C and Relative Humidity of 42% - which should give Dew Point of about 9C, but instead it is showing 21.6C. I have ticked the "Calculate dew point" option in the settings but doesn't seem to have resolved the issue.
Anyone have any thoughts?
Thanks
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Latest Cumulus MX V4 release 4.4.2 (build 4085) - 12 March 2025
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
If you are posting a new Topic about an error or if you need help PLEASE read this first viewtopic.php?p=164080#p164080
Incorrect dew point calculation?
Moderator: mcrossley
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mike_j_kelly
- Posts: 3
- Joined: Sat 19 Feb 2022 12:08 pm
- Weather Station: Instromet
- Operating System: Windows 10
Incorrect dew point calculation?
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mcrossley
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Re: Incorrect dew point calculation?
Not that I know of, my test station uses that option and it is being correctly calculated. All the stations use the same common calculation routine when that option is enabled.