I need to see traffic over a time period not offered by the metrics charts. Is there a way I can customize the time period?

The Metrics Charts show the following time periods by default:

1h, 6h, 12h, 1d, 2d, 7d, 14d, 30d

By modifying the duration parameter in the cloud console URL, you can adjust the time period displayed in the chart. Cloud Console only stores metrics for the past 30 days.  If your duration exceeds 30 days, the chart will cover that time period but data will not exist prior to the 30 day window.

Examples

PT30M - past 30 minutes

PT8HM - past 8 hours

P5D - past 5 days

P3W - past 3 weeks

https://console.cloud.google.com/.../metrics?project=project-id&duration=PT30M