Jääsjärvi Lake

Large lake in Finland used for fishing

Inland Finnish lake offering boating, fishing and shoreline trails, with cottages and forested surroundings for weekend retreats.

Main image

Jääsjärvi at a Glance#

How to Get to Jääsjärvi#

Accessible by regional roads from nearby towns; local bus services may be available seasonally. A car gives the most straightforward access to lakeside parking and small piers.

Tips for Visiting Jääsjärvi#

  • Bring insect repellent in summer; lakeside insects can be persistent at dusk.
  • Visit local forest tracks that circle the lake-look for small wooden piers often missed by day-trippers.

Best Time to Visit Jääsjärvi#

Summer for water activities; autumn for quiet lakeside walks and color.

Summer (Jun-Aug)
June-August · 12-22°C (54-72°F)
Warm water and long evenings for swimming and paddling.
Autumn (Sep-Oct)
September-October · 5-12°C (41-54°F)
Colorful foliage and quieter trails; early frost possible.

Weather & Climate near Jääsjärvi#

Climate

Jääsjärvi's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in February). Temperatures range from -12°C to 21°C. Moderate rainfall (598 mm/year).

Best Time to Visit
JuneAugustMay
Temperature & Rainfall
Temperature Range
31°
Warmest Month
-40°
Coldest Month
Monthly Conditions

January

January is freezing with highs of -5°C and lows of -11°C. Moderate rainfall (40 mm) and mostly overcast skies.

32 Poor

Comfort

-8°
Feels Like Freezing
-8°C
Temperature
-11° -5°
99%
Humidity
Very Humid

Weather

40 mm
Rainfall
2.7 m/s
Wind
Calm
0.0
UV Index
Low
6.1h daylight

February

February is the coldest month with highs of -5°C and lows of -12°C. The driest month with just 29 mm and mostly overcast skies.

36 Poor

Comfort

-8°
Feels Like Freezing
-8°C
Temperature
-12° -5°
99%
Humidity
Very Humid

Weather

29 mm
Rainfall
2.6 m/s
Wind
Calm
0.1
UV Index
Low
8.7h daylight

March

March is freezing with highs of 1°C and lows of -7°C. Moderate rainfall (34 mm) and partly cloudy skies.

42 Poor

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-7°
95%
Humidity
Very Humid

Weather

34 mm
Rainfall
2.7 m/s
Wind
Calm
0.2
UV Index
Low
11.6h daylight

April

April is cold with highs of 6°C and lows of -2°C. Moderate rainfall (32 mm) and mostly overcast skies.

47 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
83%
Humidity
Very Humid

Weather

32 mm
Rainfall
2.7 m/s
Wind
Calm
0.5
UV Index
Moderate
14.5h daylight

May

May is cold with highs of 15°C and lows of 4°C. Moderate rainfall (33 mm) and partly cloudy skies.

63 Good

Comfort

10°
Feels Like Cold
10°C
Temperature
15°
76%
Humidity
Very Humid

Weather

33 mm
Rainfall
2.7 m/s
Wind
Calm
0.9
UV Index
Moderate
17.2h daylight

June

June is cool with highs of 20°C and lows of 10°C. Moderate rainfall (54 mm) and mostly overcast skies.

65 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
10° 20°
76%
Humidity
Very Humid

Weather

54 mm
Rainfall
2.6 m/s
Wind
Calm
1.2
UV Index
High
18.9h daylight

July

July is cool with highs of 21°C and lows of 12°C. The wettest month with 79 mm of rain and mostly overcast skies.

63 Good

Comfort

17°
Feels Like Cool
17°C
Temperature
12° 21°
78%
Humidity
Very Humid

Weather

79 mm
Rainfall
2.3 m/s
Wind
Calm
1.2
UV Index
High
18.1h daylight

August

August is cool with highs of 18°C and lows of 11°C. Moderate rainfall (78 mm) and partly cloudy skies.

65 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 19°
82%
Humidity
Very Humid

Weather

78 mm
Rainfall
2.3 m/s
Wind
Calm
0.8
UV Index
Moderate
15.6h daylight

September

September is cold with highs of 13°C and lows of 6°C. Moderate rainfall (58 mm) and mostly overcast skies.

55 Acceptable

Comfort

Feels Like Cold
C
Temperature
13°
87%
Humidity
Very Humid

Weather

58 mm
Rainfall
2.5 m/s
Wind
Calm
0.4
UV Index
Low
12.7h daylight

October

October is cold with highs of 7°C and lows of 2°C. Moderate rainfall (60 mm) and mostly overcast skies.

41 Poor

Comfort

Feels Like Cold
C
Temperature
93%
Humidity
Very Humid

Weather

60 mm
Rainfall
2.8 m/s
Wind
Calm
0.1
UV Index
Low
9.8h daylight

November

November is freezing with highs of 1°C and lows of -3°C. Moderate rainfall (54 mm) and mostly overcast skies.

34 Poor

Comfort

-1°
Feels Like Freezing
-1°C
Temperature
-3°
97%
Humidity
Very Humid

Weather

54 mm
Rainfall
2.9 m/s
Wind
Calm
0.0
UV Index
Low
6.9h daylight

December

December is freezing with highs of -3°C and lows of -8°C. Moderate rainfall (47 mm) and mostly overcast skies.

34 Poor

Comfort

-5°
Feels Like Freezing
-5°C
Temperature
-8° -3°
98%
Humidity
Very Humid

Weather

47 mm
Rainfall
2.7 m/s
Wind
Calm
0.0
UV Index
Low
5.1h daylight