How many hours of daylight does this need for continuous operation? I live in the North, where the nights get long.

I've had a Tempest since it was first introduced. It's relatively easy to set up and maintenance free. I live in the Pacific Northwest and the Tempest is pretty useless during wintertime as the solar panels don't get enough ambient light to fully charge. For the last year, WeatherFlow has promised a battery power pack accessory to mitigate this issue but they keep delaying its release.

Other than the initial cost of the sensor unit, is there any on-going access fee or subscription charge that is required to use the system?

Hi there! The Tempest Weather System is a one-time purchase and there are no required subscriptions/fees for ongoing use. I hope this helps! Kind regards,

We live in the mountains and frequently get storms with large damaging hail. Is the Tempest sensor warranted against hail damage?

I also live in the mountains but in the tropics so I cannot directly answer about hail. I do however want to mention how in my opinion, their warranty is really, really good. I had occasion where my Tempest was recording accurately but not keeping history. Weather-Flow immediately sent me a new one, no questions asked, and indeed, did not even request that I return the faulty one. Just a great experience and I'm sure they would give support in the case of hail. Cheers, Marcel Lauzon, Costa Rica

Does this weather station measure to the nearest whole degree or tenth of a degree?

On the main screen of the Tempest iPad app and on my Apple watch the temperature is displayed as a whole number. However, if you select the device on the main screen of the iPad tempest app you get more detailed information and on this page it displays temperature as xx.x (i.e. in tenths). Thus I believe the answer to your question is that it measures it to tenths of a degree although it displays it to the nearest whole degree depending on where you look.

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Description

🌦️ Own your weather, own your day — stay ahead with Tempest!

BUILT TO LAST - No moving parts and solar power ensure years of near-zero maintenance and reliable performance in any environment.
HYPER LOCAL PRECISION - Machine learning delivers the most accurate weather forecasts tailored to your exact location.
SMART HOME INTEGRATION - Seamlessly connect with Alexa, IFTTT, Rachio, and other platforms to automate your home based on real-time weather.
EFFORTLESS WIRELESS SETUP - Solar-powered sensor with 1000+ ft wireless range installs in minutes—no wiring, no fuss.
ALL IN ONE WEATHER MONITORING - Track wind speed, rainfall, UV index, lightning, humidity, and more from a single sleek device.

The WeatherFlow Tempest Weather System is a cutting-edge, solar-powered, wireless weather station that uses advanced machine learning to provide hyper-local, real-time weather data. Featuring a built-in wind meter, rain gauge, and lightning detection, it integrates effortlessly with smart home platforms like Alexa and IFTTT. Trusted by over 85,000 users and featured in top publications, Tempest offers precise forecasts, instant alerts, and a sleek, maintenance-free design perfect for any modern home or garden.

Specifications

Brand	WeatherFlow
Recommended Uses For Product	Garden, Home
Specific Uses For Product	Lightning Detection, Precipitation, Temperature, UV Index, Wind Speed
Power Source	Solar Powered
Special Feature	Advanced Weather Forecasting using Machine Learning
Material	Plastic
Connectivity Technology	Wi-Fi
Number of Batteries	1 Lithium Ion batteries required.
Style	Modern
Colour	White
Product Dimensions	10.6D x 21W x 21.6H Centimeters
Included Components	Instruction Manual
Temperature Accuracy	0.5 °C
Are Batteries Included	No
Sensor Technology	Non-mechanical
Upper Temperature Rating	140 Degrees Fahrenheit
Item Weight	726 g
Manufacturer	WeatherFlow
Shape	Rectangular
Finish Type	Glossy
Display Type	no display
Temperature Reading Accuracy	plus_minus_0_point_5_degrees_celsius
UPC	859883004298
Country of Origin	China
Model number	2020
Number of Memory Sticks	1
Batteries	1 Lithium Ion batteries required.
Item model number	2020
Lithium battery energy content	3.12 Watt Hours
Lithium Battery Packaging	Batteries contained in equipment
Lithium battery weight	0.49 Grams
Number of lithium metal cells	1

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