The Hidden Costs of Running Your Own Weather Server

Self-hosted weather software like CumulusMX and WeeWX is free. You download it, install it, and start collecting data. The sticker price is zero, which makes it an easy choice compared to a paid service.

But free software is not the same as zero cost. When you add up everything required to keep a self-hosted weather site running, the total is often higher than people expect. This post breaks down where the money and time actually go.

What hardware do you need to self-host weather software?

Self-hosting CumulusMX or WeeWX needs a computer running 24/7 — for most owners a Raspberry Pi with a case, power supply, and microSD card, roughly €80–120 up front. The Pi itself lasts for years, but the SD card is a consumable: continuous logging wears it out, so budget for at least one replacement.

In detail: a Pi 4 with a case and power supply costs roughly €70–100, more for a Pi 5, plus €10–20 for a decent microSD card. A good quality card extends the time between failures, but it will still wear out eventually under continuous write load. Over three years, you will probably replace the SD card at least once; some owners go through two or three. Repurposing an old laptop or desktop avoids the purchase but costs more in electricity, as the next section shows.

How much electricity does a weather server use?

A Raspberry Pi draws about 5–10 watts, which works out to roughly 45–90 kWh per year of continuous running. At European electricity prices of roughly €0.25–0.40 per kWh, that is about €10–35 per year just to keep the machine on.

This is not a major expense, but it is not zero, and it adds up over the life of the setup. Run the same numbers for a repurposed desktop PC — which can draw several times the power of a Pi — and the annual figure climbs accordingly. Whatever the machine, this is a cost that never appears on the "free software" label.

How much does web hosting for a weather website cost?

Self-hosted weather software generates web pages, but those pages still need to be served somewhere, and the common answer is a shared hosting plan at about €3–10 per month — €36–120 per year. Most classic weather templates also require PHP and MySQL support, which rules out the very cheapest static-only plans.

Some owners point their domain at their home IP address instead, which is unreliable without a static IP and exposes their home network to the internet. Shared hosting sidesteps that, at a price. Over three years, that is €108–360 in hosting costs alone.

Do you still need to pay for a domain name?

A custom domain costs about €10–15 per year whether you self-host or use a managed service, so it does not tip the comparison either way. The real difference is what surrounds the domain: self-hosters manage DNS and SSL certificate renewal themselves (or through their host), while hosted platforms typically include automatic SSL with the domain setup.

How much time does self-hosting actually take?

Plan for an afternoon to a full weekend of setup — the Pi, the weather software, the web host, FTP, the domain, and SSL — plus one to two hours a month of ongoing maintenance. Over a year, that adds up to roughly 15–30 hours, which dwarfs every cash cost in this list.

The rough breakdown for a first-time user:

• Setting up the Pi and installing the software: 2–4 hours
• Configuring the weather software: 1–3 hours
• Setting up the web host and FTP: 1–2 hours
• Configuring a custom domain and SSL: 1 hour
• Monthly maintenance (checking logs, updates, troubleshooting): 1–2 hours

If you value your time at even a modest rate, the total far exceeds any subscription cost. And note that this is server time only — the station itself needs its own seasonal attention (cleaning the rain gauge, checking the radiation shield) whichever way you host; the seasonal station maintenance checklist covers that separate list.

What does self-hosting cost over three years?

Over three years, a typical self-hosted setup costs roughly €258–670 in cash — hardware, replacement SD cards, electricity, hosting, and a domain — plus 50–100 hours of time. A hosted service like Pro Weather at €59/year lands at €207–222 including the same domain, with setup measured in minutes.

The table shows that over three years, the cash cost of self-hosting is comparable to or higher than a managed service — and that is before you account for your time. Money is only half the story, too: the day-to-day reliability pain points of self-hosting are a separate bill.

Is self-hosting a weather server worth it?

For tinkerers, yes: the hobby value of running your own stack is real, and the costs above are simply the price of a satisfying project. If you just want a weather website that stays online, the sums point the other way — a hosted service costs less cash and dramatically less time.

The point is not that self-hosting is too expensive. For many people, running a Pi and tinkering with software is part of the enjoyment, and that is worth paying for. But if you are not in it for the tinkering, the hidden costs of self-hosting add up to more than the visible price of a managed service. With Pro Weather, you pay a predictable monthly or yearly fee and get everything included: hosting, updates, data retention, and no hardware to manage.

For a feature comparison, see Pro Weather vs CumulusMX and Pro Weather vs WeeWX.

Common questions

How much electricity does a Raspberry Pi use per year?

A Raspberry Pi running a weather server typically draws 5–10 watts continuously, which is roughly 45–90 kWh over a full year. At European rates of €0.25–0.40 per kWh, that costs about €10–35 annually. A repurposed desktop PC doing the same job can easily draw several times as much, so the "free" old computer is often the more expensive option to run.

Is self-hosting cheaper than a hosted weather site?

In pure cash terms it is usually comparable or more expensive once you count hardware, SD card replacements, electricity, and web hosting — roughly €258–670 over three years against €207–222 for a hosted service including a domain. Count your time at any reasonable rate and self-hosting clearly costs more. The honest exception: if you already own the hardware and enjoy the tinkering, the hours are part of the hobby, not a cost.

Can I run CumulusMX or WeeWX without paying for web hosting?

Yes. Both programs happily log data locally without publishing anything, and you can serve pages from the Pi itself on your home network. Costs appear when you want a public website: either a shared hosting plan, or exposing your home connection to the internet — which brings static-IP, uptime, and security headaches that most owners prefer to pay a few euros a month to avoid.

Does staying inside WeatherLink avoid these costs?

Davis's own cloud avoids the home server entirely, but it has its own price structure: the free Basic plan is limited — no historic data through the API and slower updates — while Pro and Pro+ are paid upgrades. See what is free and what costs money across WeatherLink's plans before deciding which subscription, if any, fits your setup.