Hi,

Not certain exactly what you are after, do you want to iterate over the 
last 13 months using a similar approach to the example in the Customization 
Guide for iterating over this years months 
<http://weewx.com/docs/customizing.htm#Iteration>, ie:

#for $month in $year.months
$month.dateTime.format("%B"): Min, max temperatures: $month.outTemp.min 
$month.outTemp.max
#end for

If so you can use the $span tag in place of the $year tag as follows:

#for $month in $span($month_delta=12).months
$month.dateTime.format("%B"): Min, max temperatures: $month.outTemp.min 
$month.outTemp.max
#end for

this will display the max and min monthly temperatures for the last 13 
months including the current month, eg (the &#176; gives a ° symbol on a 
HTML page and is due to the skin using encoding = html_entities):

August: Min, max temperatures: 3.8&#176;C 28.1&#176;C
September: Min, max temperatures: 6.6&#176;C 30.6&#176;C
October: Min, max temperatures: 11.8&#176;C 31.1&#176;C
November: Min, max temperatures: 14.7&#176;C 33.8&#176;C
December: Min, max temperatures: 17.1&#176;C 37.3&#176;C
January: Min, max temperatures: 17.3&#176;C 35.0&#176;C
February: Min, max temperatures: 18.0&#176;C 35.6&#176;C
March: Min, max temperatures: 15.9&#176;C 32.1&#176;C
April: Min, max temperatures: 9.1&#176;C 33.8&#176;C
May: Min, max temperatures: 6.8&#176;C 28.5&#176;C
June: Min, max temperatures: 3.5&#176;C 24.0&#176;C
July: Min, max temperatures: 3.6&#176;C 26.2&#176;C
August: Min, max temperatures: 4.9&#176;C 28.3&#176;C

Gary

On Sunday, 29 August 2021 at 22:01:40 UTC+10 [email protected] wrote:

>
> Hello,
> In the tag, you show a loop that browsing the months of the year.
> How could I browse the last 13 months. So for example here from August 
> 2020 to August 2021
> Thank you !

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