Which robot delivery corridors have the worst weather?
Weather is where an operator's all-weather claim meets the pavement. A robot's cameras, traction, and daily uptime all degrade in rain and snow, so the number of wet and snowy days a corridor sees is a direct measure of how hard that claim is being tested. Derived from NOAA 1991-2020 climate normals, the corridors split sharply: dry-summer western corridors face little disruption, while the wet-winter and snow-belt corridors put operations under real seasonal strain. These are climate normals, not live weather, so they describe the typical year a fleet plans around, not any single storm.
Derived from NOAA 1991-2020 climate normals. How we verify.
Weather-disruption days by corridor
| Corridor | Metric | Days | Seasonal detail | Basis |
|---|---|---|---|---|
| LA West Side | Summer precip days | 3 | LA Westside has only 3 precipitation days in summer (Jun-Aug). Winter has 15. Robot operations face minimal weather disruption. From NOAA 1991-2020 monthly normals. | Derived |
| SF Core | Summer precip days | 2 | SF has only 2 precip days in summer but 27 in winter. SF's wet season is concentrated Nov-Mar. From NOAA 1991-2020 monthly normals. | Derived |
| Chicago | winter snow days | 15 | Chicago has 15 snow days concentrated in winter (Dec-Feb: ~12 snow days). Spring has ~3 snow days. Summer/fall: 0. From NOAA 1991-2020. | Derived |
| Miami | Summer precip days | 55 | Miami has 55 precip days in summer (Jun-Aug) — tropical storm season. Winter has 20 precip days. Miami's summer is the worst season for robot operations. From NOAA 1991-2020. | Derived |
| Phoenix | summer temp extreme | 107 | Phoenix July average high is 107°F. Robot battery/cooling systems stressed at these temps. Only 3 precip days in summer but extreme heat is the operational risk. From NOAA 1991-2020. | Derived |
Source: NOAA U.S. Climate Normals (1991-2020) (monthly precipitation and snow-day normals, aggregated to seasons per corridor).
Why weather is the untested edge of the all-weather claim
Most sidewalk operators market their robots as all-weather, but that claim is only as good as the conditions it has actually run in. A corridor with a wet winter or a real snow season stresses the parts of a robot that marketing does not cover: camera visibility in rain, traction on wet or icy pavement, and how many days per year the fleet has to pause. The corridors here with the most precipitation and snow days are where an all-weather claim is genuinely being tested rather than just stated. These are NOAA climate normals, so they describe the typical year, not a specific forecast.
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Every figure is derived from NOAA 1991-2020 U.S. Climate Normals (monthly precipitation and snow-day normals aggregated to seasons per corridor) and carries the Derived basis. These are measured-from-open-data facts, not reviewed DEPLOY registry records, so none carries the registry verified chip. Climate normals describe a typical year, not live weather. How we verify
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