Cumulus MX

Cumulus MX·CumulusMX.CumulusMX

The Cumulus MX weather program

winget install --id CumulusMX.CumulusMX --exact --source winget

Latest 5.1.5·July 22, 2026

Release Notes

New

  • Adds translations for the lightning fields on the Extra Sensors page
  • A new web tag to provide the WBGT exposure level 1-5 <#WBGTlevel>, the tag takes an optional parameter cat=N (where N = 0 to 3) - invalid cat=N returns 0
    • The "cat" parameter specifies which category scale to use for the exposure level (see below), it defaults to "cat=0"
    • Categories 1-3 correspond to the US National Weather Service
    • Category 0 is user defined. The user defined range must be specified in Celsius
    • Category 0 default values are based on ACGIH TLV action limits for an unacclimatized person ─────┬──────────┬──────────┬──────────┬──────────┬────────────┬────── Level│Cat 0 (°C)│Cat 1 (°F)│Cat 2 (°F)│Cat 3 (°F)│Threat Level│Flag ─────┼──────────┼──────────┼──────────┼──────────┼────────────┼────── 1 │< 25.0 │< 76.1 │< 79.8 │< 82.0 │Low │White ─────┼──────────┼──────────┼──────────┼──────────┼────────────┼────── 2 │25.0 │76.1 │79.8 │82.0 │Moderate │Green ─────┼──────────┼──────────┼──────────┼──────────┼────────────┼────── 3 │28.0 │81.0 │84.6 │87.0 │High │Yellow ─────┼──────────┼──────────┼──────────┼──────────┼────────────┼────── 4 │30.0 │84.2 │87.7 │90.0 │Very High │Red ─────┼──────────┼──────────┼──────────┼──────────┼────────────┼────── 5 │>= 32.5 │>= 86.2 │>= 89.8 │>= 92.0 │Extreme │Black ─────┴──────────┴──────────┴──────────┴──────────┴────────────┴──────
  • Adds 'Rain Since Midnight' to 'Today's Rain Editor'

Changed

  • The daily Cumulus upgrade check now only issues a warning message when the alarm is triggered rather than every time the check is performed and a new version is found
  • The Cumulus forecast now uses the average wind direction for the last hour rather than the last 10 minutes
  • The Cumulus calculated sea level pressure now uses the average temperature for the last 12 hours: (10_min_average_12h_ago + current_10_min_average) / 2
  • Comments are now allowed in JSON Station input JSON
  • Improved some error logging messages in upload.php

Fixed

  • Soil moisture units now set per sensor per station
  • Davis Cloud Station saving soil temperature values as soil moisture!
  • Fix occasional "System.objectDisposedException" during real-time FTP operations
  • Re-fix the <#daylength> and <#Tagdaylightlength> tag outputs when the value is 24 hours
  • Yesterdays high BGT/WBGT values not being written to the yesterday.ini
  • Fix <#WbgtH> <#TWbgtH> web tags not actually being implemented!
  • PM 10 data not showing on the Dashboard charts when data is ingested via the JSON station
  • Fix error in Ecowitt HTTP station parsing firmware version for OEM stations that do not send the data
  • Fix error message if the PHP secret is left blank. A new GUID value is now correctly applied

Package Updates

  • FluentFTP
  • MailKit
  • Microsoft.Win32.SystemEvents
  • MQTTnet
  • MySqlConnector
  • NLog
  • NLog.Extension.Logging
  • SQLitePCLRaw.bundle_e_sqlite3
  • System.CodeDom
  • System.IO.Ports
  • System.ServiceProcess.ServiceController

Installer type: zip

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x6486C1184695C54F23487A1EE6218B2C9CAA863B8B18E5B26A128F80CF50D047B5

Details

Homepage
https://github.com/cumulusmx/CumulusMX
License
GPL-3.0
Publisher
Cumulus MX
Support
https://github.com/cumulusmx/CumulusMX/issues

Older versions (16)

5.1.4
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5.1.3
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5.1.1
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5.1.0
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5.0.1
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5.0.0
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4.6.4
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4.6.3
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4.6.2
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4.6.1
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4.6.0
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4.5.2
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4.5.1
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4.5.0
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4.4.5
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4.4.4
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