Outdoor robot events: weather, surfaces and heat

Some robots can work outdoors, but only in dry, mild weather on a firm, flat surface, with a covered fallback ready. Unitree's user manual for the G1 sets an operating range of 0–40 °C in good weather and rules out rain, while Pepper is designed for indoor use only. Build the outdoor plan around the robot's limits, not the other way round.

What the manufacturers say

Unitree G1 (user manual, edition 1.6):

Operate at 0–40 °C in good weather; not in fog, snow, rain, lightning, sandstorms or windstorms.
Not waterproof: no water on the ground, no rain, snow or wet conditions.
Not dustproof: no gravel floors or dusty environments.
Keep it in sight and at least 2 metres from obstacles, complex terrain, crowds and water.
Store it in a dry, cool room away from sunlight and rain.

Pepper (an archived Aldebaran support page and the specification published by Maxtronics):

Designed for indoor use only; do not use it outside.
Working temperature 5–35 °C and humidity 20–80 %; protection class IPX0. Under the IEC's IP code, a second digit of 0 means no protection against liquids.
A smooth, flat floor without carpets or rugs, no slopes or stairs nearby and at least 90 cm of free space around it; the specification gives a maximum slope of 5° (at rest) and a maximum obstacle height of 1.5 cm.

Unitree Go2 (robot dog): Unitree's page mentions agile movement over gravel and slopes and climbing angles of up to 40° on some versions, but states no water or dust rating and no operating temperature. Ask the supplier before planning rain or dust exposure; see Unitree Go2.

For any other model, ask for the manufacturer's written operating limits.

Surfaces

Outdoor ground is the most common problem. The G1 manual asks for an open, flat, unobstructed area, slower walking on slopes or uneven ground, no very low-friction surfaces such as ice, no soft ground such as thick spongy surfaces, and extra care on smooth glass or ceramic tiles. Our safety page adds that cable mats, gratings, thresholds and polished stone all change how a legged robot walks.

Build a flat, rigid platform or use a stage, with a non-slip finish and no gaps.
Cover cables with flat ramps, outside the robot's walking area.
Keep the robot away from fountains, pools and wet grass.
Plan the route from the vehicle: a G1 manual published by the German distributor MYBOTSHOP notes that the transport case's built-in wheels are not suitable outdoors and recommends an extra trolley. See transport and setup.

Heat, sun and cold

Shade is essential on hot days. The G1 relies on local air cooling, according to Unitree, and its manual says to store it away from sunlight.
Batteries are temperature-sensitive. Unitree's G1 battery manual warns that charging or discharging outside its temperature limits can damage the battery or even cause fire, says not to charge when it is too hot or too cold, and gives 0–40 °C for storage. It adds that use at low temperatures severely shortens battery life. Pepper's battery is specified for charging at 10–35 °C.
Charging takes time. Unitree gives about 2 hours of running time per G1 battery and about 1.5 hours to charge one, so plan a shaded, dry charging spot and spare batteries; see battery life at events.
People need protection too. Operators and hosts outdoors need shade, water and breaks.

Rain, wind and dust

Assume no rain at all for the models above. A marquee with a solid floor is the minimum; side walls help against wind-driven rain.
Agree what happens at the first drops: who stops the robot, where it goes and how long it takes to resume.
Wind: the G1 manual rules out windstorms. Also secure lightweight branding, flags and signs near the robot.
Dust: the MYBOTSHOP manual includes checking that no water, oil, sand or soil is inside the robot before power-on. Dusty paths, sand and gravel are a no.
Lightning: stop and move indoors.

Wireless and power

The G1 manual says not to operate near sources of electromagnetic interference, such as high-voltage power lines, transmission stations, mobile-phone base stations and broadcast towers, and to avoid Wi-Fi interference, if necessary by switching off other Wi-Fi sources. Outdoor sites often have production networks and radios, so ask the supplier how they control the robot and test on the day. Arrange weather-protected power for charging. More in venue requirements.

A weather plan

Set go/no-go rules with the supplier, based on the manufacturer's limits: temperature, rain, wind and ground condition.
Book a covered fallback position in a tent or building nearby, ready from the start.
Name the decision-maker and the times you check the forecast, for example the day before and on the morning.
Put it in the contract: what happens to fees if weather stops the robot; see cancellations and change orders.
Brief your hosts so visitors get a clear message if the robot moves inside.

Checklist

Manufacturer operating limits in writing for the exact model
Shade and a dry, covered fallback area
Flat, rigid, non-slip platform with cables ramped
Distance from water, crowds and obstacles marked
Shaded charging point with weather-protected power
Spare batteries kept away from heat and cold
Go/no-go rules and a decision-maker agreed
Weather clause in the contract
Outdoor details included in your request

FAQ

Can a humanoid robot be used in the rain?

Not the common event models covered here. Unitree says the G1 is not waterproof and must not run in rain or wet conditions, and Pepper is rated IPX0 and meant for indoor use only, so plan a covered area.

What temperatures can event robots work in?

Unitree's manual gives 0–40 °C for the G1, and Pepper's specification gives 5–35 °C. Other models differ, so ask the supplier for the manufacturer's written limits.

Can a robot walk on grass or gravel?

The G1 manual rules out gravel, dusty areas and soft ground, and Pepper needs smooth, flat floors. Unitree mentions gravel for the Go2 robot dog but gives no weather rating, so a flat platform is the safest option.

What if the forecast turns bad on the day?

Agree go/no-go rules, a covered fallback position and the commercial consequences in advance, and write them into the contract so the decision on the day is quick.

Sources

How this guide was made: prepared with AI assistance; every factual statement was checked against the sources listed above on 12 October 2026. Spotted an error? Write to info@humanoid4rent.com.