Lake · Finland
Lohjanjärvi
Lake in Uusimaa region, Finland
- Area
- 94.2km²
- Average depth
- 19m
- Elevation
- 26m a.s.l.
- Shoreline
- 268km
- Volume
- 1.8km³
Lohjanjärvi is a lake in Finland. It covers 94.2 km². On average it is 19 m deep. Its surface lies 26 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Lohjanjärvi?
The water is warmest in July, around 20 °C at the surface, and coldest in January, around 0 °C. The surface averages 20 °C or more in July: comfortable for most swimmers.
The lake usually freezes over for about 115 days a year, from around 6 December to 30 March.
On the shore, afternoons reach 20 °C on average in July and -2 °C in February. The driest month is April (43 mm of rain), the wettest October (79 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (93 readings). Shallow bays and beaches are often warmer.
From above
The whole lake from space
Month by month
The year at the lake, month by month
Not a forecast: these are averages over many years. Water is the 2013–2021 average; air, rain, sun and wind are the 1991–2020 average.
Water: 2013–2021 averageClimate: 1991–2020 average
| Month | Water°C | Water high°C | Air high°C | Air low°C | Rainmm | Rainy daysdays | Sunh/day | Windkm/h |
|---|---|---|---|---|---|---|---|---|
| January | Ice | — | -2 | -6 | 60 | 14 | 0.3 | 19 |
| February | Ice | — | -2 | -7 | 48 | 11 | 1.8 | 18 |
| March | Ice | — | 1 | -4 | 43 | 10 | 4.9 | 17 |
| April | 4 | 7 | 6 | 0 | 43 | 9 | 6.9 | 15 |
| May | 10 | 14 | 13 | 6 | 48 | 8 | 8.7 | 14 |
| June | 17 | 19 | 17 | 11 | 63 | 11 | 8.8 | 14 |
| July | 20 | 20 | 20 | 15 | 60 | 12 | 8.3 | 14 |
| August | 20 | 20 | 20 | 14 | 72 | 13 | 6.9 | 15 |
| September | 16 | 18 | 15 | 10 | 61 | 11 | 4.4 | 17 |
| October | 10 | 13 | 9 | 5 | 79 | 14 | 2.0 | 18 |
| November | 4 | 7 | 4 | 1 | 77 | 15 | 0.1 | 19 |
| December | Ice | — | 1 | -3 | 70 | 16 | 0.0 | 20 |
Water: LakeTEMP (Landsat 8, 2013–2021). Air, rain, sun and wind: NASA POWER, 1991–2020 averages. A rainy day has at least 1 mm of rain. Sunshine hours are derived from measured solar radiation.
Size & depth
How big, how deep
- On average, water stays in the lake for about 2.4 years before flowing out.
- Its catchment drains 2,097 km² of land.
- About 23 m³ of water flow out every second, on average.
- Its shoreline is 7.8 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Lohjanjärvi
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 12beaches and swimming spots
Paloniemen Uimaranta, Vivamon uimaranta, Aurlahden uimaranta, Moision uimaranta, Päiväkumpu and 7 more
- 2campsites
Partioniemi, Asuntovaunualue
- 5boat hire and water-sport clubs
Ojamon kaivoslampi, Aquapro, LP-maja, Melan Vääntäjät ry:n vaja, Lohjan Purjehtijat ry:n tukikohta
- 19marinas and slipways
Voudinpuiston veneluiska, Pähkinäniemen veneluiska, Tuusanlahden veneluiska, Aurlahden veneenlaskupaikka, Moision veneluiska and 14 more
- —ferry piers
- 7viewpoints
- 29hotels, B&Bs and chalets
Laiskanlinna, Lohja Spa & Resort, Hietikko, Vivamon lomakeskus, Suurniemen tila and 24 more
- —fishing spots
- 35restaurants and cafés
Towns on the shore
- Lohja45,686 people
- Karjalohja1,657 people
Nearest airport with scheduled flights: Helsinki Vantaa Airport (HEL), 57 km in a straight line.
Car hire at HEL airport (Helsinki)Discover Cars · Affiliate linkOpenStreetMap is built by volunteers: when a number is low, it may just mean nobody has mapped it yet.
Recent years
How each month compared
Afternoon high on the shore. The first row is the reference, the 1991–2020 average in °C; the years below show the difference from it: warmer in orange, cooler in blue.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | -1.8 | -2.2 | 0.8 | 6.5 | 12.6 | 16.9 | 20.5 | 19.8 | 15.3 | 8.7 | 4.0 | 0.7 |
| 2020 | +5.3 | +4.8 | +2.7 | +0.4 | −1.3 | +2.9 | −1.9 | +0.5 | +0.6 | +2.2 | +2.7 | +1.4 |
| 2021 | −0.9 | −2.6 | +0.7 | ±0.0 | −1.0 | +3.8 | +3.0 | −1.5 | −2.1 | +1.4 | +0.3 | −3.4 |
| 2022 | +1.4 | +2.2 | +1.7 | −0.6 | −1.4 | +1.9 | +0.1 | +2.3 | −1.5 | +2.1 | +0.5 | −1.0 |
| 2023 | +1.9 | +2.4 | +0.2 | +1.2 | +0.4 | +2.7 | −1.0 | +0.4 | +2.7 | −0.6 | −1.9 | −3.3 |
| 2024 | −2.2 | +0.7 | +1.2 | −1.5 | +3.5 | +2.1 | +0.3 | +1.1 | +2.5 | +2.4 | +1.4 | +2.1 |
| 2025 | +3.0 | +1.5 | +3.1 | +1.4 | −0.4 | −0.5 | +1.5 | −1.0 | +1.5 | +1.1 | +2.3 | +2.8 |
+1 warmer than usual −1 cooler than usual
EstoniaAbout these numbers
| Outline, area, depth, volume | HydroLAKES v1.0 (Messager et al. 2016) · CC BY 4.0 |
|---|---|
| Water temperature and ice | LakeTEMP v1 (Korver et al. 2024), Landsat 8 2013–2021 · CC BY 4.0 |
| Air, rain, sun, wind | NASA POWER, 1991–2020 · public domain |
| Names and description | Wikidata (Q1329118) · CC0 |
| Around the shore | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average or a count from a public dataset. Licences and methods: data sources.
