Cumulus 1.8.9 (build 930) is now available for download.
See the downloads section for the link, and the Cumulus product page for a list of changes.

Cumulus Weather Station Software
Cumulus 1.8.9 (build 930) is now available for download.
See the downloads section for the link, and the Cumulus product page for a list of changes.
Cumulus 1.8.8 (build 881) is now available for download.
Changes from 1.8.7:
This version requires the Silverlight 3 runtime, and fixes a few bugs (e.g. broken gauge animation).
It can be downloaded from the downloads page.
The Cumulus Wiki is now live. Please have a look at it, use it, and contribute if you can.
Cumulus 1.8.7 (build 819) is now available for download.
Changes from 1.8.6:
Cumulus ‘Realtime’ version 1.0.0.2 is now available in the downloads section. This is a Silverlight application which you can install on your web site which will allow the viewing of your data in real time. See here for a demonstration.
Cumulus 1.8.6 (build 812) is now available for download.
Changes from 1.8.5:
– Fixed saving of non-default ftp port
- Added option to use file for twitter update
- Added web tags for WMR928 extra sensors
– Option to keep to clock time year-round for 0900 rollover
– Option to prevent multiple instances running
– Captions for WMR928 extra channels are configurable
– Fixed problem where Fine Offset day rollover not done when bad data detected
– Corrected ‘rain since midnight’ for 0900 rollovers (for Wunderground etc)
– Option to copy files locally instead of ftp
– Don’t write today.ini unless station contacted
– Option to have South as origin of wind direction charts
– Fix average temp calculation when using logger data
– Fix problem with daily extremes when first logger entry causes day rollover
– Attempt to avoid reading WS23xx data when station is talking to remote sensors
– Added ‘Print…’ menu to Select-a-graph window
– Fixed high rain rate at startup (Fine offset)
– Added option to copy images to a specified folder
– Send altimeter pressure to CWOP instead of MSLP
– Added <#dawn>, <#dusk> and <#daylightlength> web tags
– Added dawn/dusk display to main screen
– Option to display cloud base on main screen
- Option to configure cloud base units independently of altitude units
– Set colour of moon phase text to black
– Option to restart Cumulus if Fine Offset station uplugged
– Range of wind gauge can now be specified
– Snow unit text in diary can now be specified
Cumulus 1.8.5 (build 726) is now available for download.
Changes from 1.8.4:
– Attempt to fix startup problem when shut down just before midnight
– Stopped old backups going into recycle bin
– Added support for Twitter (http://www.twitter.com)
– Changed wind gauge so it continues to re-scale up to a max of 200
– Allowed main window to be resized smaller (with scroll bars)
- Added printer selection dialogue to Print function
- Added print function to Graphs form
- Added archive data count to status bar
– Prevent crash when no printer installed
– Fix problem with all-time low pressure when offset in use
– Fix wrong times for some of today’s extremes
- Add WMR928 extra sensor display
- Extra debugging for Fine Offset rain rate
– Fixed ‘ghost’ rain rate just after startup
- Added wind chill to logs and graphs
– Added UV and Solar Rad to Wunderground and PWSweather updates
– Fixed some problems with dewpoint and windchill on Fine Offset
– Add offset facility for inside temperature
– Don’t put leading slash on realtime.txt path if ftp directory is blank
– Attempt to detect WS2300 sensors disconnected
– Fix a missing day rollover problem
– Changed temperature chart so temperature line is always on top
– Removed temperature cutoff from chill calc
- Attempt to cater for displays less than 1024×768
– Added APRS humidity cutoff for quirky OS sensors (set via ini file)
- More filtering for bad WS2300 data
– Fixed WS2300 bad pressure data check for “in Hg” units
– Allow for rain multiplier at rollover (incorrect this month and year displayed)
– Correct WS2300 rain total when gauge (but not console) has been reset
– Allow manual input of Fine Offset pressure offset (set via ini file)
– Cater for Fine Offset humidity ‘underflow’ value of FF
- Options to not send UV and SolarRad to Weather Underground and PWS Weather
– Clock now has 12-hour display option (click on it)
– Changed extra file processing to use unique filename for each file
– Added support for Vantage Pro USB and TCP/IP connection
(note: USB connection is untested)
– Fixed a problem with WS23xx history download
– Create realtime.txt file even if realtime not in use
There is a bug in all versions of Cumulus before 1.8.4 build 605 (which I have just uploaded), which affects Fine Offset users. The bug occurs in the processing of the history data during the wrap-around from the end of the memory back to the beginning. All Fine Offset users are urged to upgrade to version 1.8.4 build 605 as soon as possible. Even if you have previously downloaded version 1.8.4, if the build number (check in About…) is less than 605, you need to download the new version from http://sandaysoft.com/downloads
Cumulus 1.8.4 (build 603) is now available for download.
Changes from version 1.8.3:
- Added ET,UV and Solar Rad for Davis stations
- Added pressure range config for forecast
- Added config for FTP port number
- Improved Fine Offset rain rate calculation
- Display Davis transmitter battery status
- Fixed an error in one of the forecast strings
- Fixed a startup problem for some Fine Offset users
- Added battery status for WMR-928 (etc)
- Added ET,UV and SolarRad to realtime.txt
- Fixed <#temptrendtext> tag for deg F users
- Fixed colour change for daily rain chart
- Increased pressure and ET resolution by 1 dp for Davis
- Added experimental forced VP barometer update
- Help now has search facility
- Prevent calibrated humidity being >100 or <0
- Fixed ET decimal places
- Added day length, moonrise, and moonset times, with web tags
- Added ‘delete before upload’ option for ftp
- Improved ftp connect timeout handling
- Added resize option for web graph files
- Added <#windrunY> web tag – yesterday’s wind run
- Added extra debugging for WS2300
- Changed latitude/longitude/elevation web tag output to have
- Fixed WS2300 absolute pressure in history data bug
- Fixed garbage entry when downloading WS2300 history
- Ignore dubious relative pressure reading at startup (Fine Offset)
- Save backups of data files at startup
- Use different temp filenames for realtime uploads
- Adds 10-minute average wind bearing (degrees) to realtime.txt
- Add latest gust to data log
- Option to plot latest gust instead of recent max gust
- Option to display bearing of zero degrees and ‘—’ when calm
- Added ‘rain last hour’ to realtime.txt