thermograph/templates/city.html.j2
Emi Griffith 7d17d8bc4f Render every percentile through one rule (#186)
The homepage strip floored percentiles into 1-99 while the Day page rendered
"100th pct" for the same reading. Rather than teach the Day page a second copy
of the rule, put it in grading.pct_ordinal() and have every surface defer to it:
the Day page, the calendar tooltip, the chart labels, the city pages and the
strip.

Two bugs fell out of unifying them:

- The city pages rendered `{{ c.percentile }}th pct` against a float, so all
  ~1000 of them showed "97.1th pct", "66.4th pct", "16.5th pct" — and would say
  "1th"/"2th"/"3th" for the low tail. Live in prod.
- Python's round() is half-to-even and JavaScript's Math.round is half-up, so
  16.5 gave "16th" server-side and "17th" client-side. The Python helper uses
  floor(x + 0.5) to match the frontend exactly; a cross-language check over every
  .5 boundary now agrees on all of them.

The frontend mirrors the rule as pctOrd() in shared.js, replacing the bare ord()
at all five percentile call sites (day.js, calendar.js, chart.js x2, app.js).
ord() stays as the general ordinal helper it always was.
2026-07-18 09:08:28 +00:00

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{% extends "base.html.j2" %}
{% block title %}{{ page_title }}{% endblock %}
{% block description %}{{ page_description }}{% endblock %}
{% block canonical_path %}{{ canonical_path }}{% endblock %}
{% block jsonld %}<script type="application/ld+json">{{ jsonld_str | safe }}</script>{% endblock %}
{% block content %}
<nav class="breadcrumb" aria-label="Breadcrumb">
{% for label, href in breadcrumb %}{% if href %}<a href="{{ href }}">{{ label }}</a>{% else %}<span>{{ label }}</span>{% endif %}{% if not loop.last %} <span class="sep"></span> {% endif %}{% endfor %}
</nav>
<article class="climate-page">
<h1>{{ display }} climate</h1>
<p class="lede">Average temperatures, precipitation and all-time records for <b>{{ display }}</b>,
with every day graded against ~{{ n_years }} years of local climate history
({{ year_range[0] }}{{ year_range[1] }}).{% if warmest and coldest %} Its warmest month is
<b>{{ warmest.name }}</b>, averaging a high of {{ warmest.high }}, and its coldest is
<b>{{ coldest.name }}</b>, with an average low of {{ coldest.low }}.{% endif %}</p>
{% if flavor %}
<p class="city-blurb">{{ flavor.extract }}{% if flavor.url %}
<a class="blurb-src" href="{{ flavor.url }}" rel="nofollow">— via Wikipedia</a>{% endif %}</p>
{% endif %}
{% if today %}
<section class="climate-today">
<h2>How today compares</h2>
<p class="muted">Latest recorded day: {{ today.date }} — each reading placed on {{ display }}'s
own ±7-day seasonal distribution.</p>
<div class="today-cards">
{% for c in today.cards %}
<div class="today-card" style="border-left-color: var(--{{ c.cls }})">
<span class="tc-label">{{ c.label }}</span>
<span class="tc-value">{{ c.value }}</span>
{% if c.percentile is not none %}<span class="tc-grade">{{ c.grade }} · {{ c.percentile|ordinal }} pct</span>
{% else %}<span class="tc-grade">{{ c.grade }}</span>{% endif %}
</div>
{% endfor %}
</div>
<p><a class="cta" href="{{ base }}/#{{ tool_hash }}">Open {{ name }} in the live weather grader →</a></p>
</section>
{% endif %}
{% if event %}
<section class="city-event">
<h2>Notable weather in {{ name }}</h2>
<p>{{ event.text }}{% if event.url %} <a href="{{ event.url }}" rel="nofollow">Read&nbsp;more&nbsp;→</a>{% endif %}</p>
</section>
{% endif %}
<section class="climate-normals">
<h2>{{ name }} average temperatures by month</h2>
<p>Typical daily high and low, and average precipitation, for each month in {{ display }},
based on {{ year_range[0] }}{{ year_range[1] }} records.
{% if wettest %}The wettest month is <b>{{ wettest.name }}</b> ({{ wettest.precip }} on an average day).{% endif %}</p>
<div class="table-wrap">
<table class="normals-table">
<thead><tr><th>Month</th><th>Avg high</th><th>Avg low</th><th>Avg precip</th></tr></thead>
<tbody>
{% for m in months %}
<tr>
<td><a href="{{ base }}/climate/{{ city.slug }}/{{ m.slug }}">{{ m.name }}</a></td>
<td class="t-cell t-{{ temp_class(m.high_f) }}">{{ m.high }}</td>
<td class="t-cell t-{{ temp_class(m.low_f) }}">{{ m.low }}</td>
<td>{{ m.precip }}</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
<div class="range-strip" aria-hidden="true">
{% for m in months %}
<div class="range-row">
<span class="range-month">{{ m.name[:3] }}</span>
<span class="range-track">
{% if m.bar %}<span class="range-fill" style="left:{{ m.bar.left }}%;width:{{ m.bar.width }}%;--c1:var(--{{ m.bar.c1 }});--c2:var(--{{ m.bar.c2 }})"></span>{% endif %}
</span>
{% if m.range_lo_f is not none and m.range_hi_f is not none %}
<span class="range-vals">{{ temp_bare(m.range_lo_f) }}{{ temp_bare(m.range_hi_f) }}</span>
{% else %}<span class="range-vals">—</span>{% endif %}
</div>
{% endfor %}
</div>
<p class="range-note muted">Each bar spans the 10th-percentile daily low to the 90th-percentile daily
high — the range most days fall within — coloured cold&nbsp;→&nbsp;hot on a shared
{{ temp(-10) }} to {{ temp(115) }} scale, so the whole year's rhythm reads at a glance.</p>
</section>
<section class="city-travel">
<h2>Thinking of visiting {{ name }}?</h2>
<p>Trips live and die by the weather. See how {{ name }}'s comfort stacks up against where
you live — {{ name }} is pre-loaded, just add your city.</p>
<p><a class="cta" href="{{ compare_url }}">Compare {{ name }}'s comfort with your city →</a></p>
</section>
{% if records.tmax or records.tmin %}
<section class="climate-records">
<h2>Record extremes</h2>
<ul>
{% if records.tmax %}<li><b>Hottest day on record:</b> {{ temp(records.tmax.max) }} on {{ records.tmax.max_date }}</li>{% endif %}
{% if records.tmin %}<li><b>Coldest day on record:</b> {{ temp(records.tmin.min) }} on {{ records.tmin.min_date }}</li>{% endif %}
</ul>
<p><a href="{{ base }}/climate/{{ city.slug }}/records">All {{ name }} weather records →</a></p>
</section>
{% endif %}
<p class="climate-foot muted">Percentiles compare each day to {{ display }}'s own history, so grades are
relative to this location — a “Near Record” day here isn't the same temperature as elsewhere.
<a href="{{ base }}/legend">How the grades work →</a></p>
</article>
{% endblock %}