donnerwetter.de

Readiness by lane

Green: donnerwetter.de. Thin bar: Weather Forecast peer median.

Priority fixes for donnerwetter.de

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.

   What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.

   84% of Weather Forecast peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: CDN Guide for Website Owners

2. Priority 2 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   88% of Weather Forecast peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   39% of Weather Forecast peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

4. Priority 4 · Enable

   XML sitemap discoverable

   Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.

   What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.

   66% of Weather Forecast peers do this.

   Guide: XML Sitemap Guide: Include Only URLs You Stand Behind

What donnerwetter.de already does well

Practices fewer than half of Weather Forecast peers use.

• Modern image formats in useWebP or AVIF images detected.23% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.31% of peers
• Structured data presentJSON-LD structured data found.39% of peers

What we saw

Homepage checked

https://www.donnerwetter.de/

Homepage response

HTTP 200

TLS

TLSv1.2

Certificate

Sectigo, 365-day validity, expiring 2027-02-06

DNS operators

GoDaddy DNS

DMARC policy

p=reject

Homepage HTML

91 KB, gzip

Images on homepage

24 (jpg 10, png 9, gif 5, webp 1)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Weather Forecast sites

• buienradar.be51
• jma.go.jp53
• meteociel.fr53
• sat24.com52
• willyweather.com.au54

Weather Forecast readiness benchmark