Climate in Kymi

Average daytime and nighttime temperatures

All climatic diagrams on this site result from the collected data from 14 measuring weather stations in Kymi.
All data correspond to the average monthly values of the last 20 years.

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The climate widely corresponds to Central European weather conditions. It is cold, wet and a few beautiful summer months are also happening during a year. It won't be really warm here and given to the water temperatures of 17 degrees maximum you will leave your bathing togs at home. Due to the warmer temperatures the best time for traveling is from May to September. Less attractive are the cold months from October to March.
Overview: Climate in Finland
Daylengths and sun positions in Finland
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Kymi
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 9 hours per day, June is the sunniest month in greater region Kymi. In December the sun shines the shortest.
Rainy days per monthRainy days per month in Kymi
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 13 rainy days, December offers the most number of rainy days, and in April the least.
Precipitation in mm/dayPrecipitation in Kymi
The amount of precipitation is measured in millimeters per square meter. Thus, at two mm/day, two liters of water fall on one square meter within 24 hours. With only 0.9 mm, the least rain falls in March. July, on the other hand, has the most rain.
Water temperatureWater temperatures in Kymi
Water temperature depends not only on solar radiation within the same region, but also on ocean currents. For example, depending on the season, cold or warm water masses are moved from other areas. The warmest temperatures in Kymi are in August, when the water is 17 °C.
Relative humidity in %Relative humidity in Kymi
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With only 65% humidity on average, it is quite dry in June. The highest value of 90% is experienced here in November.
Absolute humidity in g/m³Absolute humidity in Kymi
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy.
Climate charts for other greater regions in Finland

Map of Kymi

Most important cities in the greater region »Kymi«

The greater region has a west-east extension of about 420 km and over 290 km from north to south.

It consists of the two provinces South Karelia and Southern Ostrobothnia.

CityPopulationGeo position
Lappeenranta59,27661° 3' 31"N28° 11' 19"E
Seinäjoki32,14962° 47' 40"N22° 49' 42"E
Imatra29,61561° 10' 19"N28° 45' 9"E
Kauhajoki14,52662° 25' 60"N22° 10' 60"E
Lapua14,09162° 58' 9"N23° 0' 32"E
Nurmo11,90862° 49' 43"N22° 54' 36"E
Ilmajoki11,69362° 43' 60"N22° 34' 0"E
Kurikka10,62862° 37' 0"N22° 25' 0"E
Joutseno10,60361° 7' 5"N28° 30' 27"E
Alavus9,42262° 34' 60"N23° 37' 0"E
Alajärvi8,79363° 0' 0"N23° 49' 0"E
Jalasjärvi8,66262° 30' 0"N22° 45' 0"E
Kauhava7,89663° 6' 11"N23° 4' 17"E
Ähtäri6,83562° 33' 15"N24° 3' 43"E
Teuva6,09262° 28' 55"N21° 44' 30"E
Ruokolahti5,78061° 16' 60"N28° 49' 60"E
Ylistaro5,58062° 56' 22"N22° 30' 47"E
Luumäki5,30560° 55' 34"N27° 34' 53"E
Alahärmä4,91563° 13' 60"N22° 51' 0"E
Taipalsaari4,77861° 8' 60"N28° 3' 0"E
Jurva4,45062° 40' 60"N21° 58' 60"E
Rautjärvi4,31661° 25' 60"N29° 21' 0"E
Parikkala4,27461° 32' 60"N29° 30' 0"E
Kuortane4,21962° 47' 60"N23° 30' 0"E
Savitaipale4,19561° 12' 0"N27° 41' 60"E
Lappajärvi3,58863° 12' 0"N23° 37' 60"E
Vimpeli3,41863° 9' 43"N23° 49' 9"E
Töysä3,14462° 37' 41"N23° 49' 6"E
Lemi3,03461° 3' 45"N27° 48' 21"E
Evijärvi2,87863° 22' 0"N23° 28' 60"E

Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants:, United Nations Statistics Division and own research.
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