This graph, which shows data for Friday, Nov. 14, 2014, looks at how Uber’s surge multiplier changes throughout the day in the U Street neighborhood in Northwest Washington, D.C.

The nightlife scene is vibrant along U Street. Uber is commonly used in the area to take bar- and concert-goers home after a night out, and it seemed likely that the ride-sharing service’s popularity would affect prices throughout the day.

There were a lot of changes. The surge multiplier for Uber X spiked 16 times on this Friday.

The somewhat surprising result: prices were significantly higher in the morning — as people headed to work — than at night, when people hit the bars.

The surge multiplier actually peaked in the morning, at 3.5x around 9 a.m. But while prices for some products fluctuated and surged to more than three times the normal fare, they didn’t stay high for long. At 5:50 p.m., for example, the surge multiplier for Uber X reached 2.4x. But by 8 p.m., the surge multiplier had dropped down to 1x until past midnight.

Earlier in the day, between 7:30 a.m. and 10:00 a.m., there were only a few quick breaks — such as between 7:55 a.m. and 8 a.m. — when the fare was 1x. Miss that window by a few minutes, and Uber X riders were faced with fares between 2.8x and 3.3x.