Without metering the scene, the exposure would have been F16 at 1/60 second in bright sunlight. Allowing two additional stops of exposure because the overcast conditions makes the correct exposure F16 at 1/15 second.

You overexposed by four stops. Not two stops as someone else suggested.

Considering the scene, had I made this exposure I probably would have exposed this at F16 1/3 and given N+ development to gain better sky value separation.