UKCP09: 5km Gridded Mean Relative Humidity Averages for the UK

1961-1990 monthly averages for mean relative humidity across the United Kingdom, provided on a 5km grid. The dataset consists of 12 files, one for each month, created with financial support from the UK Department for Environment, Food and Rural Affairs (Defra) and promoted by the UK Climate Impacts Programme. Data access requires registration on the Met Office website.

Use Cases

• Modeling historical climate baselines based on the 1961-1990 average period
• Analyzing spatial patterns of atmospheric moisture based on 5km gridded data
• Validating climate model projections for relative humidity based on long-term observational averages

Strengths

• 12 monthly files provide complete annual coverage for the 1961-1990 period
• Data is gridded at a 5km resolution for spatial analysis
• Created with support from a national government department (Defra)

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect temporal bias inherent to the 1961-1990 baseline period

Provenance

Source

Met Office

Collection Method

Likely derived from meteorological station observations and interpolated to a grid.

Time Range

1961-1990

Freshness

Last updated 2026-07-08 13:30:22.158800; freshness should be verified

Geography

United Kingdom