21 Apr will be cool and the weather will be stable, thunderstorms not likely.
There is a 98% probability of heavy rainfall, moderate sleet and snowfall.
The sky will be overcast:
84% high clouds (above 6,000 meters: Cirrus, Cirrus uncinus, Cirrostratus, Cirrocumulus)
100% middle clouds (from 2,000 to 6,000 meters: Altostratus, Altocumulus)
100% low clouds (below 2,000 meters: Cumulus, Stratocumulus, Stratus, Fractostratus)
1% convective clouds (Cumulonimbus)
The highest temperature will reach 6 degrees Celsius, while the the lowest temperature will drop to 1 degrees Celsius. The wind will be a gentle breeze, fog will form, and the mean air pressure will be 1012 mb. Relative humidity will be very high.