The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Joensuu, IS
Content continues below
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
18°
4
16°
5
16°
6
11°
7
13°
8
15°
9
16°
10
16°
11
16°
12
16°
13
15°
14
16°
15
15°
16
15°
17
14°
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Thursday, September 3, 2026
Day
18°
Feels 17
Wind
16 km/h SW
Gust
24 km/h
Humidity
66%
P.O.P
40%
Rain
~1 mm
Night
8°
Feels 6
Wind
13 km/h SW
Gust
19 km/h
Humidity
100%
P.O.P
40%
Rain
<1 mm
Historical Averages
Sep 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
September
Average Temperature
High
13°
Feels 12
Low
7°
Feels 5
Average Precipitation
12 Days
Rain amount
66.2mm
Snow amount
0.1cm