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Homeowner Guide

Colorado Hail Season Guide

Colorado's hail season runs April through September, with peak activity May through August along the Front Range. The I-25 corridor between Denver and Pueblo — Hail Alley — averages more damaging hail than anywhere in the U.S. Hail 1 inch or larger typically damages roofs.

The Calendar

Hail Season, Month by Month

The season is narrower than most people expect. Across the 672 ground-confirmed hail days in our record, 88% fell in May, June, or July — and June alone accounted for about half. Here is how the confirmed hail days break down:

Share of the 672 ground-confirmed hail days in Red Hawk's 139-city record, 2021–2026. No April hail day in these cities was confirmed on the ground over that period — April storms happen, but measured hail here is overwhelmingly a May-to-July event.

Radar-indicated hail is not measured hail.
The size quoted after a storm is often a radar algorithm's high-end estimate of what might exist inside the cloud — not what landed on your roof. When someone cites hail size at your door, ask whether anyone measured it.

Before the Season

Get Ahead of the First Storm

  • Get a baseline inspection so pre-season condition is documented — free, photo-documented, written report.
  • Photograph your roof, gutters, and siding from the ground while everything is undamaged.
  • Pull out your policy: note your deductible and whether coverage is ACV or RCV before you ever need it.
  • Clear gutters and trim overhanging branches — storm debris compounds hail damage.

After a Storm

The First 24 Hours

  • Photograph hailstones next to a coin for scale before they melt, and damage from the ground before anything is moved.
  • Check the soft metals that date a storm — gutters, downspouts, AC fins, window screens, mailboxes.
  • Don't climb on the roof, and don't sign anything at the door the day of the storm.
  • If hail was 1 inch or larger, schedule an inspection and report the claim promptly.

If a storm did hit, the claim itself has its own playbook — see our step-by-step guide to filing a roof insurance claim in Colorado, or go deeper on storm-day law and documentation in the hail season survival guide.

Frequently Asked Questions

Colorado's hail season runs roughly April through September, with peak activity in late May through early August along the Front Range.

The I-25 corridor between Cheyenne, Denver, and Pueblo — known as Hail Alley — sees more damaging hail than anywhere else in the United States.

Hail 1 inch or larger (quarter-sized) typically causes shingle damage. Hail 1.75+ inches (golf-ball-sized) almost always causes documented damage requiring replacement.

Red Hawk maintains a hail record for 139 Front Range cities built from National Weather Service Local Storm Reports — hail people actually measured on the ground — covering 672 confirmed hail days backed by 5,422 individual reports since 2021.

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