| No significant weather observed |
0 |
| Haze, smoke or dust in suspension in the air, visibility ≥ 1 km |
4 |
| Haze, smoke or dust in suspension in the air, visibility < 1 km |
5 |
| Mist |
10 |
| Fog was observed during the preceding hour but not at the time of
observation |
20 |
| Precipitation was observed during the preceding hour but not at the time of
observation |
21 |
| Drizzle (not freezing) or snow grains was observed during the preceding hour but
not at the time of observation |
22 |
| Rain (not freezing) was observed during the preceding hour but not at the time of
observation |
23 |
| Snow was observed during the preceding hour but not at the time of
observation |
24 |
| Freezing rain or freezing drizzle was observed during the preceding hour but not
at the time of observation |
25 |
| Fog |
30 |
| Fog or ice fog, in patches |
31 |
| Fog or ice fog, has become thinner during the past hour |
32 |
| Fog or ice fog, no appreciable change during the past hour |
33 |
| Fog or ice fog, has begun or become thicker during the past hour |
34 |
| Precipitation |
40 |
| Precipitation, slight or moderate |
41 |
| Precipitation, heavy |
42 |
| Liquid precipitation, slight or moderate |
43 |
| Liquid precipitation, heavy |
44 |
| Solid precipitation, slight or moderate |
45 |
| Solid precipitation, heavy |
46 |
| Freezing precipitation, slight or moderate |
47 |
| Freezing precipitation, freezing, heavy |
48 |
| Drizzle |
50 |
| Drizzle, not freezing, slight |
51 |
| Drizzle, not freezing, moderate |
52 |
| Drizzle, not freezing, heavy |
53 |
| Drizzle, freezing, light |
54 |
| Drizzle, freezing, moderate |
55 |
| Drizzle, freezing, heavy |
56 |
| Drizzle and rain mixed, slight |
57 |
| Drizzle and rain mixed, moderate or heavy |
58 |
| Rain |
60 |
| Rain, light |
61 |
| Rain, moderate |
62 |
| Rain, heavy |
63 |
| Rain, freezing, light |
64 |
| Rain, freezing, moderate |
65 |
| Rain, freezing, heavy |
66 |
| Rain (or drizzle) and snow, light |
67 |
| Rain (or drizzle) and snow, moderate or heavy |
68 |
| Snow |
70 |
| Snow, light |
71 |
| Snow, moderate |
72 |
| Snow, heavy |
73 |
| Ice pellets, light |
74 |
| Ice pellets, moderate |
75 |
| Ice pellets, heavy |
76 |
| Snow grains |
77 |
| Ice crystals |
78 |
| Showers or intermittent precipitation |
80 |
| Rain showers, light |
81 |
| Rain showers, moderate |
82 |
| Rain showers, heavy |
83 |
| Rain showers, violent ( >32 mm/h ) |
84 |
| Snow showers, light |
85 |
| Snow showers, moderate |
86 |
| Snow showers, heavy |
87 |
| Hail |
89 |
