Riga
Latvia
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 31 | 22 | 15 | 10 | 8 | 16 | 18 | 25 | 30 | 33 | 34 | 34 | 34 |
| Average high, °C | 16 | 11 | 5 | 1 | 0 | 0 | 2 | 8 | 14 | 17 | 20 | 20 | 10 |
| Average temperature, °C | 13 | 8 | 3 | 0 | -2 | -3 | 0 | 4 | 10 | 14 | 17 | 16 | 7 |
| Average low, °C | 10 | 5 | 1 | -2 | -5 | -5 | -2 | 1 | 6 | 10 | 13 | 13 | 4 |
| Record low, °C | -2 | -7 | -18 | -26 | -33 | -32 | -24 | -10 | -4 | 1 | 5 | 5 | -33 |
| Fog, days | 17 | 20 | 20 | 23 | 22 | 22 | 24 | 20 | 19 | 20 | 19 | 20 | 246 |
| Thunderstorms, days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 3 | 2 | 12 |
| Average precipitation, mm. | 80 | 73 | 76 | 64 | 48 | 33 | 32 | 35 | 38 | 46 | 69 | 74 | 669 |
| Relative humidity, % | 81 | 83 | 87 | 87 | 87 | 86 | 83 | 76 | 76 | 77 | 79 | 79 | 82 |
| Relative humidity morning, % | 88 | 88 | 87 | 88 | 87 | 87 | 88 | 88 | 87 | 90 | 91 | 90 | 88 |
| Relative humidity evening, % | 71 | 75 | 83 | 85 | 84 | 80 | 74 | 68 | 64 | 69 | 72 | 71 | 75 |
| Wind speed, km/h | 12 | 13 | 14 | 15 | 15 | 13 | 13 | 11 | 11 | 12 | 10 | 11 | 13 |
| Monthly sunshine, часов | 188 | 105 | 41 | 26 | 34 | 66 | 135 | 204 | 288 | 294 | 290 | 257 | 1928 |
| Day Length, часов | 13 | 11 | 9 | 8 | 8 | 10 | 13 | 15 | 17 | 19 | 18 | 16 | 13 |
| Dew point, °C | 8 | 5 | 1 | -1 | -3 | -4 | -2 | 1 | 5 | 10 | 12 | 12 | 44 |
| Growing degree-day, °C | 83 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 100 | 198 | 198 | 580 |
| Solar radiation, global, Mj/m2 | 12 | 6 | 2 | 1 | 2 | 4 | 10 | 16 | 22 | 23 | 22 | 18 | 11 |