UKCP09: 1961-1990 Baseline Monthly Air Frost Days for UK Regions

Long-term 1961-1990 climate baseline averages for days of air frost across 14 UK administrative regions and 23 river basins. Each regional value is an average of underlying 5 x 5 km grid cell values, provided as space-delimited text files by the UK Met Office. The data was created with support from the UK Department for Environment, Food and Rural Affairs (Defra) and promoted by the UK Climate Impacts Programme.

Use Cases

• Analyzing historical frost frequency patterns based on monthly averages for UK regions.
• Comparing baseline air frost conditions between administrative regions and river basins.
• Validating climate models using the 1961-1990 long-term average reference period.

Strengths

• Data covers a 30-year climate baseline period (1961-1990).
• Provides values for 14 administrative regions and 23 river basins.
• Spatial detail is derived from averaging underlying 5 x 5 km grid cells.

Limitations

• Row count and specific column definitions are unknown, requiring inspection after download.
• Data freshness should be verified despite the listed last update date of 2026-07-08.
• Access requires registration on the Met Office website, which may be a barrier.

Provenance

Source

Met Office (UK)

Collection Method

Averages of 5 x 5 km grid cell values within defined regional boundaries.

Time Range

1961-1990

Freshness

Last updated 2026-07-08 13:31:00.322970; freshness should be verified.

Geography

United Kingdom (14 administrative regions, 23 river basins)