It is extremely cryptic but in aviation we have a TAF, Terminal Aerodrome Forecast. It shows, for the few hundred airports for which it is prepared, very specific sky conditions by periods of time for the next 24 to 30 hours. So instead of cloudy, mostly cloudy, partly sunny, it shows cloud cover (clear, few, scattered, broken, overcast), sometimes cloud type (usually cumulus when forecast) and .... this is the key ... altitude. For a landscape image there is a huge difference between 1500 ft scattered and 12000 ft scattered.
I get mine undecoded because it is so fast to read. You can get it decoded. The times are in GMT. Here is DCA for the next 24 hours:
KDCA 182338Z 1900/2006 02008G16KT 5SM -RA BR BKN008 OVC015
FM190200 02015G28KT 5SM -RA BR SCT008 OVC015
TEMPO 1902/1903 BKN008
FM191000 01022G36KT P6SM VCSH SCT025 BKN035
FM191600 01020G34KT P6SM FEW080 SCT250
FM191900 01015G25KT P6SM FEW200
FM200000 02008KT P6SM SKC
This basically says that tomorrow from sunrise until mid morning it will be very windy with scatter showers. The clouds will be scattered at 2500 feet and broken at 3500 feet. But tomorrow night, clear skies. Maybe I'll do a little astrophotography.
But you can get it decoded.
The decoded version is sooooo long that I will just post a link. You can enter your nearby airport (KBOS, KJFk, etc) to get your forecast. These are mid to large airports. You would be surprised at the smaller airports for which these are generated. KMRB for example: Martinsburg WV.
The forecast is updated every 6 hours. These are the best forecasts we can produce as so so much is riding on them. But, it is weather.
I used this recently when planning a sunrise over the city. The forecast was for high (6000 feet scattered) clouds becoming clear. I wanted the clouds so as to capture the sun illuminating them from below. It was clear. Again, weather.
AWC - Terminal Aerodrome Forecasts (TAFs)