Show the Weather Temperature in the Mac Menu Bar

What you need

Multimeter for macOS 13 or later, $19.99 once.
Your latitude and longitude.

Set it up

Find your latitude and longitude. Open-Meteo’s place search gives them for any town (the first result’s latitude and longitude):
Terminal
```
curl -s 'https://geocoding-api.open-meteo.com/v1/search?name=Plano&count=1'
```
Add a Web Address meter with your coordinates in this address, and the key path current.temperature_2m. Drop &temperature_unit=fahrenheit for Celsius.
Web address
```
https://api.open-meteo.com/v1/forecast?latitude=33.02&longitude=-96.70&current=temperature_2m&temperature_unit=fahrenheit
```
Refresh every 15 minutes. Set the range to your local extremes (for example 10 to 110) and the unit to °F.

Multimeter settings

In Customize This Meter… (from the meter’s menu):

Settings for this meter
Setting	Value
Source	Web Address
Web address	`https://api.open-meteo.com/v1/forecast?latitude=LAT&longitude=LON&current=temperature_2m&temperature_unit=fahrenheit`
Key path	`current.temperature_2m`
Refresh every	15 minutes
Range	10 to 110 (°F) or -10 to 40 (°C)
Unit	`°F` or `°C`
Alerts	High values: warning 95, critical 100 (or Low values for frost)
Label	`OUT`
Face	Thermometer, Label & Value or Arc Gauge

Tested: Run on October 29, 2026 for Plano, Texas: 74.9 °F (feels like 82.5).

More on this source, including every format it reads, in the Web Address guide.

Limits

Open-Meteo allows up to 10,000 calls a day for non-commercial use without a key; one meter every 15 minutes uses 96. Its models update about every hour.
It’s a weather model for your coordinates, not a thermometer outside your window; it can differ from a nearby station by a degree or two.

Variations

Feels like, humidity, wind

Ask for more in current=, comma separated, and pick one per meter: apparent_temperature, relative_humidity_2m, wind_speed_10m (add &wind_speed_unit=mph), precipitation, cloud_cover.

Today’s high

Use &daily=temperature_2m_max&timezone=auto&forecast_days=1 and the key path daily.temperature_2m_max.0.

Troubleshooting

What the meter says, why, and what to do
Symptom	Cause	Fix
No number found in the response	The key path doesn’t match the reply.	Run `curl -s` with the address and read the JSON. Dots walk into objects, numbers pick array items (`items.0.count`).
Couldn’t reach the address	No network, a typo in the host, or the service is down.	Open the address in your browser. Multimeter tries again at the next refresh.
The server answered 400	A typo in a variable name in `current=`.	Check the names against open-meteo.com’s docs; the error message in the reply says which one.

Questions

Can it show the weather icon or conditions?

Meters show numbers. current=weather_code gives a WMO code (0 clear, 61 rain, 71 snow) if you want an alert on rain or snow.

Does it use my location automatically?

No. You type your coordinates once, so nothing asks for location access.

Show the temperature outside in your Mac menu bar