The Today entries are displayed in ajax-dashboard.php
<td style="text-align: right;"><strong><?php langtrans('High:'); ?></strong></td>
<td style="text-align: center;">
<span class="ajax" id="ajaxtempmax">
<?php echo strip_units($maxtemp) . $uomTemp; ?>
</span><br />
<span class="ajax" id="ajaxtempmaxtime">
<?php echo fixup_time($maxtempt); ?></span>
</td>
and
<td style="text-align: right;"><strong><?php langtrans('Low:'); ?></strong></td>
<td style="text-align: center;">
<span class="ajax" id="ajaxtempmin">
<?php
echo strip_units($mintemp) . $uomTemp; ?>
</span><br />
<span class="ajax" id="ajaxtempmintime">
<?php echo fixup_time($mintempt); ?></span>
</td>
so when first displayed, the values from testtags.php are shown
$maxtemp = '77.7°F'; // today's maximum temperature
$maxtempt = '1:36 PM'; // time this occurred
$mintemp = '45.9°F'; // today's minimum temperature
$mintempt = '5:36 AM'; // time this occurred
When ajaxWDwx.js starts execution, the values for ajax[min|max]temp[t] are updated by
var tempmax = convertTemp(clientraw[46]);
set_ajax_obs("ajaxtempmax",tempmax.toFixed(1) + uomTemp);
var tempmin = convertTemp(clientraw[47]);
set_ajax_obs("ajaxtempmin",tempmin.toFixed(1) + uomTemp);
but the max and min times are NOT updated by the ajaxWDwx.js script currently, so those times are only from testtags.php.
The variables now appear in clientraw.txt
174 Time of daily max temp Time 1:36_PM
175 Time of daily min temp Time 5:36_AM
but when the ajaxWDwx.js script was written in 2006, those fields weren't available in clientraw.txt so the markup was included in ajax-dashboard.php, just not any code to ajaxWDwx.js to update it.