The files today.ini and yesterday.ini are used by Cumulus to store the Highs and Lows (and their timestamps) for key parameters as reached on each of the two days. These files are located in the Data sub-folder of the path where your Cumulus.exe is installed.

The today file is written to throughout the current day as any new High or Low for the day at reached. At the end of a day [either midnight, or 9am (or 10am) depending on your configuration and season], the today.ini file is rolled-over to become yesterday.ini and a new today.ini is created. From the examples below you can see that the two files have a few differences in content, so rolling-over does involve a little editing work.

If you close down and restart Cumulus during the day it will read these files at startup, so it can resume tracking extremes of the key parameters.

Normally you would not need to edit these files, however rarely you may wish to edit the rain data if there has been a quirk in your weather station reporting during the day and the figure is abnormally inflated. Note: If you do edit either of these files, you must close Cumulus down first!

Example today.ini file

[General]
Date=29/04/2011
Timestamp=29/04/2011 11:50:00

[Wind]
Speed=10.7008972167969
SpTime=10:09
Gust=22.0114517211914
Time=08:42
Bearing=90
Direction=E
Windrun=63.1526298522949
DominantWindBearing=317
DominantWindBearingMinutes=1041
DominantWindBearingX=-3914.11743164063
DominantWindBearingY=4215.82763671875

[Temp]
Low=8.30000019073486
LTime=01:16
High=16.8999996185303
HTime=11:41
Total=7500.697265625
Samples=714
ChillHours=1.64999914169312
HeatingDegreeDays=5.34738397598267
CoolingDegreeDays=0

[Pressure]
Low=1014.89996337891
LTime=11:13
High=1018.79998779297
HTime=00:06

[Rain]
High=0
HTime=00:00
Start=1923.59997558594         
Yesterday=0                    
LastTip=2011-04-22 22:08
HourlyHigh=0
HHourlyTime=00:00
ConsecutiveRainDays=2
ConsecutiveDryDays=0

[ET]
Annual=0
Startofday=0

[Humidity]
Low=65
High=88
LTime=11:45
HTime=06:06

[Solar]
SunshineHours=0
SunshineHoursToMidnight=0

[HeatIndex]
High=16.8999996185303
HTime=11:41

[AppTemp]
Low=5.0417857170105
LTime=01:30
High=15.0359125137329
HTime=11:52

[WindChill]
Low=6.39816427230835
LTime=01:30

[Dewpoint]
Low=5.30104923248291
LTime=00:52
High=10.7219848632813
HTime=11:38

[NOAA]
LatestMonthlyReport=
LatestYearlyReport=

Example yesterday.ini

See Average_temperature for one key transformation between today.ini and yesterday.ini, no ET parameters are retained, plus there are some wind and some rain parameters not copied from today.ini to yesterday.ini.

NOTE: Yesterday's total rainfall is stored in today.ini, but yesterday's RG11 rainfall is stored in yesterday.ini.

[General]
Date=28/04/2011

[Wind]
Speed=7.2
SpTime=09:00
Gust=15.9
Time=12:15
Bearing=315
Direction=NW
Windrun=35.3391151428223
DominantWindBearing=230

[Temp]
Low=5.6
LTime=05:34
High=21.0
HTime=14:46
HeatingDegreeDays=3.76118206977844
CoolingDegreeDays=0.702986478805542
AvgTemp=12.4447975158691

[Pressure]
Low=29.72
LTime=09:00
High=29.85
HTime=22:12

[Rain]
High=1.2
HTime=00:34
HourlyHigh=0.899999976158142
HHourlyTime=02:04
RG11Yesterday=0

[Humidity]
Low=49
High=99
LTime=14:34
HTime=00:34

[Solar]
SunshineHours=0
HighSolarRad=0
HighSolarRadTime=09:00
HighUV=0
HighUVTime=09:00

[HeatIndex]
High=21
HTime=14:46

[AppTemp]
Low=3.98110413551331
LTime=05:34
High=21.0052318572998
HTime=15:50

[WindChill]
Low=5.59999990463257
LTime=05:34

[Dewpoint]
Low=5.4555492401123
LTime=05:34
High=11.6547174453735
HTime=09:03