Not an expert but here's what I found from a little research:
It's hard to quantify, but it does seem like regional predictions are less accurate than continental, and predictions about rainfall are less accurate than temperature. However, predictions of rising temperature are essentially guaranteed.
> There is considerable confidence that climate models provide
credible quantitative estimates of future climate change, particularly
at continental scales and above ...
> Confidence in model estimates is higher
for some climate variables (e.g., temperature) than for others
(e.g., precipitation).
> Over several decades of development, models
have consistently provided a robust and unambiguous picture of
significant climate warming
It's hard to quantify, but it does seem like regional predictions are less accurate than continental, and predictions about rainfall are less accurate than temperature. However, predictions of rising temperature are essentially guaranteed.
> There is considerable confidence that climate models provide credible quantitative estimates of future climate change, particularly at continental scales and above ...
> Confidence in model estimates is higher for some climate variables (e.g., temperature) than for others (e.g., precipitation).
> Over several decades of development, models have consistently provided a robust and unambiguous picture of significant climate warming
Sources:
[1] https://oceanservice.noaa.gov/education/pd/climate/factsheet... [2] https://archive.ipcc.ch/publications_and_data/ar4/wg1/en/faq...