Common information

Country
Latvia
Population
1,800

Weather, climate, temperature by months in Roja

Season Autumn Winter Spring Summer
Month Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Year
Record high, °C 25 22 12 15 12 11 17 18 27 30 30 31 31
Average high, °C 14 9 5 1 0 -1 2 6 12 16 18 18 8
Average temperature, °C 12 7 3 0 -1 -2 0 3 8 13 16 16 6
Average low, °C 9 5 1 -1 -3 -5 -2 0 5 10 12 12 4
Record low, °C -2 -5 -12 -20 -27 -31 -21 -7 -3 -1 4 0 -31
Rain, days 19 19 20 15 10 7 10 13 14 14 15 17 173
Snow, days 0 2 7 17 18 15 11 6 1 0 0 0 77
Fog, days 14 17 14 15 15 17 21 19 20 18 19 18 207
Thunderstorms, days 1 0 0 0 0 0 0 0 2 2 3 3 11
Average precipitation, mm. 31 25 29 64 10 6 14 11 28 108 62 40 428
Relative humidity, % 82 84 86 87 87 86 85 79 71 75 78 80 82
Relative humidity morning, % 88 86 86 86 86 87 88 89 88 89 91 90 88
Relative humidity evening, % 73 77 82 84 82 81 79 74 69 71 73 74 77
Wind speed, km/h 14 14 14 14 14 14 9 9 12 12 12 12 13
Monthly sunshine, часов 153 93 39 22 31 62 127 183 264 288 264 229 1754
Day Length, часов 13 11 9 8 8 10 13 15 18 19 18 16 13
Dew point, °C 8 4 0 -2 -3 -5 -2 0 5 9 12 12 38
Growing degree-day, °C 58 0 0 0 0 0 0 0 0 100 181 172 511
Atmosphere pressure, bar 1013 1013 1011 1010 1012 1014 1014 1013 1016 1012 1012 1013 12152
Solar radiation, global, Mj/m2 11 5 2 1 2 4 9 15 21 22 21 17 11

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