London first. It is a light-layer day rather than a raincoat day: cloudier this morning, then brighter with high cloud, topping out near 68°F / 20°C and falling to 57°F / 14°C. Wednesday turns cooler with a couple of showers—about 60°F / 16°C—so a compact umbrella may be useful tomorrow.

New York, briefly. Sunny, 67°F / 19°C, then 53°F / 12°C tonight. Wednesday stays sunny and turns breezier in the afternoon.