Why is everything wet outside even though it did not rain last night?
There are many reasons why everything may be wet outdoors, despite there not having been any raining overnight. Some possible explanations include:

Evaporation: Water molecules in the air can evaporate and become clouds, which then precipitate as rain. If the ground is dry, more water will evaporate from the soil than fall as rain. This process can continue over several hours or days and explain why everything appears to be wet after a relatively brief period of no precipitation.

Drip irrigation: Drip irrigation uses small amounts of water to directly irrigate plants, so some of that moisture remains on the foliage long after the previous rain has fallen. Additionally, when the irrigation system operates, water runs off into nearby areas, creating a damp environment around plant roots.

Rivers and lakes: Even if it does not rain where you live, water flows down rivers and across lake beds. This continuous supply of fresh water can cause local regions to appear moist even though there was no significant precipitation yesterday.

Snowmelt: During spring and early summer, snowpack melts slowly and eventually releases its stored water as runoff into streams and other bodies of water. When this occurs during a drought, additional water may remain on the surface and result in widespread apparent rain.

These are just a few examples of how things might appear wet outdoors even though they have not received any significant rain recently. It's important to keep an eye on local weather conditions and be aware of potential sources of water evaporation and drainage to ensure your plants receive adequate watering and enjoy consistent humidity levels.