Is there a way to calculate average max temperature and low temperature for the last or next 3 days?
I found the syntax to generate max and min temperatures for the next 3 days. But how do I perform calculations on it? The max/min results are like 72, 52, 42, 60. How do you add, subtract a string.
In an expression field you can use basic mathematical operators:
Set variable {averageTemp} = (Value1+Value2+Value3)/3
Not sure how to do that. I have assigned dynamic variable for max and min F. How do I use that to find average? When I try to create expression it says variable not found.
The expression editor will not find a new variable until you save and reopen the piston.
(variableMin + variableMax) / 2 = variableAverage
OK. Got it. Another issue is that $weather.forecast10day.forecast.simpleforecast.forecastday.high gives out results as [74, 54, 42, 61]. When I do avg(max,min) the results are 60423447. All the 4 temperature are combined a 1 number. My goal is to find avg(max, min) for next 3 days. Then find avg(day1,day2,day3) and then avg(day1,day2) And finally avg(avg (day1,day2,day3), avg(day1,day2)).
If I could get max/min of individual days that would fix my problem.
example:$weather.forecasttoday.forecast.simpleforecast.forecastday.high
$weather.forecasttomorrow.forecast.simpleforecast.forecastday.high
Unfortunately Wunderground’s api is not always ideal (as I have learned with my roof heater piston) … so…
using what is available here: https://wiki.webcore.co/Weather I through this together … I only did two days but should get you going … and I am postiive there is a more elegant way to do this 
in the brackets can be 0-9
0=today
1=tomorrow
2=next day … etc
Hmmm actually i think 0 may be tomorrow with this call…
Will fix and repost in a sec
Today:
$weather.forecast10day.forecast.simpleforecast.forecastday.high.celsius[0]
Tomorrow:
$weather.forecast10day.forecast.simpleforecast.forecastday.high.celsius[1]
Thanks. I think I got the calculation to work. Now I want the piston to run and send me a text if the final average is above 52F.
example: Temperature is 54.1F.
My piston has this message saying ‘This piston does not subscribe to any events. Unless executed by other means, it will never run on its own’
Well then you’ll have to check the current observation hourly and update max / min.
Define
integer recordedMax
integer recordedMin
integer recordedAve
integer recordedAveYesterday
Every 1 hour at 00 minutes
IF
$weather.conditions.current_observation.temp_c IS greater than {recordedMax}
THEN
set variable {recordedMax} = {$weather.conditions.current_observation.temp_c}
End if
IF
$weather.conditions.current_observation.temp_c IS less than {recordedMin}
THEN
set variable {recordedMin} = {$weather.conditions.current_observation.temp_c}
End if
set variable {recordedAve} = {recordedMax * recordedMin) / 2
End every
Happens daily at 00:05
DO
Set variable {recordedAveYesterday} = {recordedAve}
// reset max / min for next day
Set variable {recordedMin} = {recordedAve}
Set variable {recordedMax} = {recordedAve}
End Every
This is what I have. I will see how this works. Anyway for webcore to message me Soil temperature is ‘avg3 value’?
I had to involve my thermostat else the piston wasn’t going to run on its own. So now every time my thermostat is idle/heating/cooling it does the temperature calculations.
Is there a way to add the AVG3 value to the PUSH notifications? Example: Soil temperature is 55 F.
I just figured it out. But I am unable to adjust decimal place. This is what i have:
"Soil temperature is " {AVG3}
