UKCP09: 1961-1990 Baseline Monthly Rainfall Days for UK Regions

UKCP09 regional values provide long-term average monthly counts of days with rainfall ≥ 1 mm for the 1961-1990 climate baseline. The Met Office produced these averages for 14 UK administrative regions and 23 river basins by aggregating 5 x 5 km grid cell values. The data is provided as space-delimited text files.

Use Cases

• Analyzing historical monthly rainfall frequency patterns based on the 1961-1990 baseline averages
• Comparing precipitation climatology between UK administrative regions and river basins
• Validating or calibrating hydrological models using long-term regional rainfall day averages

Strengths

• Covers a standard 30-year climate baseline period (1961-1990)
• Provides data for two distinct spatial units: 14 administrative regions and 23 river basins
• Values are derived from a consistent 5 x 5 km grid resolution

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download
• Column-level documentation is absent; field semantics must be inferred after download

Provenance

Source

Met Office

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 13:33:20.000454; freshness should be verified

Geography

United Kingdom (14 administrative regions, 23 river basins)