Climate in Joensuu (Finland)

The climate of Joensuu is cold continental, with freezing winters and mild summers.
The city is located in eastern Finland, in North Karelia.
The white nights, when it doesn't get completely dark even at midnight, occur from 3 May to 11 August.
In winter, there can be cold spells of arctic origin. The coldest record is -39 °C (-38.2 °F) and was set in January 1968.
In summer, there can be short hot periods. Generally the temperature does not exceed 31/32 °C (88/90 °F), but in July 2010 it reached 37 °C (99 °F), even though for only one day.

Best Time

The best time to visit Joensuu is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.

Joensuu - Climate data

The average temperature of the coldest month (February) is of -8.8 °C (16.1 °F), that of the warmest month (July) is of 17.2 °C (63.0 °F). Here are the average temperatures.
Precipitation amounts to 655 millimeters (25.8 inches) per year: so, it is at an intermediate level. It ranges from 35 mm (1.4 in) in the driest months (April, May) to 75 mm (3 in) in the wettest one (August). Here is the average precipitation.

Joensuu - Weather by month

Based on the period 1991-2020

---

January is generally a freezing cold month. The average temperature is of -8.8 °C (16 °F), with a minimum of -12 °C (10.4 °F) and a maximum of -5.6 °C (21.9 °F).
On the coldest nights of the month, the temperature usually drops to around -26.5 °C (-15.5 °F). However, it dropped to -38.3 °C (-36.9 °F) in January 2003.
On the warmest days of the month, the temperature usually reaches around 3 °C (37.5 °F). However, it reached 6.4 °C (43.5 °F) in January 2020.
Precipitation amounts to 50 mm (2 in), distributed over 12 days.
The day lasts on average 6 hours and 5 minutes. So the days are short.
The average humidity is 90%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

February, the coldest month of the year, is generally a freezing cold month. The average temperature is of -8.8 °C (16 °F), with a minimum of -12.3 °C (9.9 °F) and a maximum of -5.4 °C (22.3 °F).
On the coldest nights of the month, the temperature usually drops to around -26 °C (-14.5 °F). However, it dropped to -36 °C (-32.8 °F) in February 1994.
On the warmest days of the month, the temperature usually reaches around 2.5 °C (37 °F). However, it reached 5.8 °C (42.4 °F) in February 2020.
Precipitation amounts to 40 mm (1.6 in), distributed over 10 days.
The day lasts on average 8 hours and 55 minutes.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

March is generally a very cold month. The average temperature is of -4.1 °C (25 °F), with a minimum of -8.1 °C (17.4 °F) and a maximum of -0.1 °C (31.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -18.5 °C (-1.5 °F). However, it dropped to -26.5 °C (-15.7 °F) in March 1998.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 7.5 °C (45 °F). However, it reached 15 °C (59 °F) in March 2000.
Precipitation amounts to 40 mm (1.6 in), distributed over 10 days.
The day lasts on average 11 hours and 55 minutes.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

April is generally a cold month. The average temperature is of 2.0 °C (36 °F), with a minimum of -2.3 °C (27.9 °F) and a maximum of 6.3 °C (43.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -11 °C (12.5 °F). However, it dropped to -19.1 °C (-2.4 °F) in April 1998.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 15 °C (59 °F). However, it reached 23.5 °C (74.3 °F) in April 2001.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 15 hours and 0 minutes.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 10 kph (7 mph).

---

May is generally a mild month. The average temperature is of 8.9 °C (48 °F), with a minimum of 3.7 °C (38.7 °F) and a maximum of 14.1 °C (57.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -4 °C (24.5 °F). However, it dropped to -10 °C (14 °F) in May 1995.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 23.5 °C (74 °F). However, it reached 29.2 °C (84.6 °F) in May 2014.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 18 hours and 0 minutes. So the days are very long.
The average humidity is 62%.
The average wind speed is 11 kph (7 mph).

---

June is generally a mild month. The average temperature is of 14.1 °C (57 °F), with a minimum of 9.2 °C (48.5 °F) and a maximum of 18.9 °C (66.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 2 °C (35.5 °F). However, it dropped to -3 °C (26.6 °F) in June 2003.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26.5 °C (80 °F). However, it reached 32 °C (89.6 °F) in June 1998.
Precipitation amounts to 70 mm (2.8 in), distributed over 12 days.
The day lasts on average 19 hours and 55 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 65%.
The average wind speed is 11 kph (7 mph).

---

July, the warmest month of the year, is generally a very mild month. The average temperature is of 17.2 °C (63 °F), with a minimum of 12.6 °C (54.6 °F) and a maximum of 21.9 °C (71.4 °F).
On the coldest nights of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 2.6 °C (36.7 °F) in July 1992.
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, it reached 37.2 °C (99 °F) in July 2010.
Precipitation amounts to 70 mm (2.8 in), distributed over 10 days.
The day lasts on average 18 hours and 50 minutes. So the days are very long.
The average humidity is 69%.
The average wind speed is 10 kph (6 mph).

---

August is generally a very mild month. The average temperature is of 15.1 °C (59 °F), with a minimum of 10.8 °C (51.5 °F) and a maximum of 19.4 °C (66.9 °F).
On the coldest nights of the month, the temperature usually drops to around 4.5 °C (39.5 °F). However, it dropped to 0 °C (32 °F) in August 2010.
On the warmest days of the month, the temperature usually reaches around 26 °C (79 °F). However, it reached 31.4 °C (88.5 °F) in August 2010.
Precipitation amounts to 75 mm (3 in), distributed over 10 days.
The day lasts on average 15 hours and 55 minutes. So the days are long.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).

---

September is generally a mild month. The average temperature is of 9.8 °C (50 °F), with a minimum of 6.2 °C (43.2 °F) and a maximum of 13.3 °C (56 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1 °C (30 °F). However, it dropped to -4.6 °C (23.7 °F) in September 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 20 °C (68.5 °F). However, it reached 24.1 °C (75.4 °F) in September 1996.
Precipitation amounts to 60 mm (2.4 in), distributed over 11 days.
The day lasts on average 12 hours and 55 minutes.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

October is generally a cold month. The average temperature is of 3.4 °C (38 °F), with a minimum of 0.9 °C (33.7 °F) and a maximum of 5.9 °C (42.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -8 °C (18 °F). However, it dropped to -15.6 °C (3.9 °F) in October 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 12.5 °C (54.5 °F). However, it reached 19 °C (66.2 °F) in October 2018.
Precipitation amounts to 60 mm (2.4 in), distributed over 11 days.
The day lasts on average 9 hours and 50 minutes.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

November is generally a very cold month. The average temperature is of -1.8 °C (29 °F), with a minimum of -4 °C (24.9 °F) and a maximum of 0.3 °C (32.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -14 °C (6.5 °F). However, it dropped to -26.5 °C (-15.7 °F) in November 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 7 °C (45 °F). However, it reached 10.5 °C (50.9 °F) in November 2011.
Precipitation amounts to 60 mm (2.4 in), distributed over 13 days.
The day lasts on average 6 hours and 55 minutes. So the days are short.
The average humidity is 92%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).

---

December is generally a freezing cold month. The average temperature is of -5.8 °C (22 °F), with a minimum of -8.5 °C (16.7 °F) and a maximum of -3.1 °C (26.3 °F).
On the coldest nights of the month, the temperature usually drops to around -21.5 °C (-6.5 °F). However, it dropped to -33 °C (-27.4 °F) in December 2010.
On the warmest days of the month, the temperature usually reaches around 3.5 °C (38.5 °F). However, it reached 8.3 °C (46.9 °F) in December 2006.
Precipitation amounts to 55 mm (2.2 in), distributed over 12 days.
The day lasts on average 5 hours and 5 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 92%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).