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NEC monthly summary

Helping settle contractual claims

The NEC states that extension to contract claims can only be granted if the weather has been exceptionally severe. The weather must have been worse than could have been expected one year out of ten, in terms of:

  • Monthly rainfall total
  • Number of days with rainfall greater than 5 mm
  • Number of days with an air frost
  • Number of days with snow lying at 0900 UTC


The NEC Monthly Summary helps you to settle claims quickly and efficiently and provides the following information.

  • A comparison of weather experienced during the month with the 1-in-10-year values of the month
  • Summaries for 150 locations in the UK
  • The monthly weather information required by users of the Institution of Civil Engineers New Engineering Contract (NEC)
For further information or to purchase one of our building and construction services, please send an e-mail to construction@metoffice.gov.uk or call our 24-hour Customer Centre.