Greatest Daily Precipitation

The greatest daily precipitation over the forecast period (p1d).

Week 1 and week 2 forecasted index is available daily from September 1 to August 31.

Week 3 and week 4 forecasted index is available weekly (Thursday) from September 1 to August 31.

Units: mm

Precipitation (moisture availability) establishes the economic yield potential and product quality of field crops. Both dry and wet precipitation extremes have the ability to inhibit proper crop growth. The greatest daily precipitation index covers the risk of excessive precipitation in the short term, while the other indices pertain to longer term moisture availability.

Agriculture and Agri-Food Canada (AAFC) and Environment and Climate Change Canada (ECCC) have together developed a suite of extreme agrometeorological indices based on four main categories of weather factors: temperature, precipitation, heat, and wind. The extreme weather indices are intended as short-term prediction tools and generated using ECCC’s medium range forecasts to create a weekly index product on a daily and weekly basis.

Data and Resources

Additional Info

Field Value
Last Updated January 20, 2026, 00:32 (UTC)
Created January 16, 2026, 20:34 (UTC)
crisis_categories Canicules
criticality_level Élevé
data_formats GEOTIF; PDF
description_fr The greatest daily precipitation over the forecast period (p1d). Week 1 and week 2 forecasted index is available daily from September 1 to August 31. Week 3 and week 4 forecasted index is available weekly (Thursday) from September 1 to August 31. Units: mm Precipitation (moisture availability) establishes the economic yield potential and product quality of field crops. Both dry and wet precipitation extremes have the ability to inhibit proper crop growth. The greatest daily precipitation index covers the risk of excessive precipitation in the short term, while the other indices pertain to longer term moisture availability. Agriculture and Agri-Food Canada (AAFC) and Environment and Climate Change Canada (ECCC) have together developed a suite of extreme agrometeorological indices based on four main categories of weather factors: temperature, precipitation, heat, and wind. The extreme weather indices are intended as short-term prediction tools and generated using ECCC’s medium range forecasts to create a weekly index product on a daily and weekly basis.
fair_openness Level 2 - Machine-readable
geographic_scope Canada
opening_level Donnée ouverte au grand public
sector nature_and_environment
sensitivity_level Faible
source_inventaire Inventaire_F
source_url https://donnees.montreal.ca/dataset/57e5248f-bd91-4381-af6e-57747158895e/resource/573d6d63-1407-40b3-a2b9-78ff8b9217ef/download/pluviometrie-quantite_2025-2027.csv
title_fr Greatest Daily Precipitation
update_frequency Chaque jour