With the UK increasingly experiencing more frequent temperature extremes – both hot and cold – now is a good time to revisit what the law says about workplace conditions and how you can help ensure your team remains safe and comfortable.

The Health and Safety Executive (HSE) offers practical guidance to help businesses stay compliant and prepared.

Is There a Maximum Temperature for Workplaces?

You might be surprised to learn that there is no legally defined maximum temperature for workplaces. This is because some environments – such as foundries or bakeries – are expected to operate at higher temperatures due to the nature of the work.

However, this doesn’t mean employers can disregard the risks associated with heat. Health and safety regulations require that you:

  • Maintain a comfortable indoor temperature

  • Ensure the supply of clean, fresh air

What About the Minimum Temperature?

For indoor workspaces, the guidelines are more specific:

  • The temperature should not fall below 16°C

  • For tasks involving rigorous physical effort, it may be acceptable as low as 13°C

Additional Risks for Outdoor Workers

Employees working outdoors face extra challenges when temperatures rise or fall dramatically. Heatstroke, cold stress, and even long-term conditions like skin cancer can pose serious risks. Weather can also impair concentration and the safe handling of machinery or tools.

As an employer, it’s vital to have procedures and protections in place for staff exposed to outdoor working conditions.

Managing Work in Extreme Temperatures

Certain industries naturally involve exposure to extreme heat or cold. If your business falls into this category, make sure you’re addressing potential issues like:

  • Heat stress

  • Dehydration

  • Cold stress

Providing regular breaks, access to water, shade or heating, and appropriate clothing can significantly improve working conditions.

Final Thoughts

While there’s no official maximum workplace temperature, the key takeaway is that employers have a duty to ensure conditions don’t jeopardise staff health. If your team is struggling with temperature-related discomfort, it’s time to reassess your current setup. Even small changes can go a long way.

To learn more, visit the HSE guide: https://www.hse.gov.uk/temperature/employer/index.htm