What happened to weather app data source?

I have a Pixel 7a, and have run Pixels for years. Sometime in the last 2-3 months, the weather app & widget has gone completely off the rails for its forecast. I live in Squamish, Canada, and almost every day the weather app shows a temperature that is 5-10°C (10-20°F) off of what the actual temperature is (as measured at the airport, the government meteorology report, and my manual outdoor thermometer).

Like what the hell? I can understand variance within a couple degrees, but Google weather is literally predicting deep freezes when the nighttime temp doesn't go below 5C, and it tells me that it's currently 10C outside (jeans & hoody weather) when it's actually 20C (shorts and t-shirt).

Any insight into what has changed, or if there is any hope of a fix? (Slim chance I know, but it's so ridiculously off I have some hope it will get noticed)