Weather Helsinki - Selected year and month

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Month:   01     02     03     04     05     06     07     08     09     10     11     12     
Weather statistics of month 05/2009
month curves
 
Low temperature -3.0°C 2009-05-01 05:20
High temperature +27.0°C 2009-05-31 15:00
Low wind chill -3.0°C 2009-05-01 05:20
Average temperature +10.9°C  
High wind speed (10min) 11.0m/s 2009-05-09 14:50
Low pressure 999.0hPa 2009-05-23 05:20
High pressure 1035.0hPa 2009-05-30 03:00
Low R.H 14% 2009-05-15 16:20
Days with maxtemp >= +25 °C 2   
daily averages

If mean daily temperature is continuously:
< 0 °C = thermal winter,   > +10°C = thermal summer
0°C - +10°C = thermal spring or thermal autumn

Unit conversions:
  • Temperature: 0 °C = 32 °F,    (°F = 32 +1.8*°C)
  • Wind speed:  1 m/s = 3,6 km/h = 2.23694 mph = 1.94387 kt