In article ,
Chef! writes:
Now I am confused. I sometimes refer to www.metcheck.com. Their 7-day
forecast predicts rainfall to the nearest mm, windspeed to +/- 1 mph,
pressure to the nearest mb, cloud cover to +/-1%.

Does that mean that they are reporting figures to a spurious degree of
accuracy or are their predictions really that accurate for the weather 7
days from now?

The former. You can't achieve that degree of accuracy for a one-day
forecast, never mind seven days.
--
John Hall
"Home is heaven and orgies are vile,
But you *need* an orgy, once in a while."
Ogden Nash (1902-1971)