Lahti Weather: September
 |
Average Day Temperature: | 59.5°F |
|
Average Night Temperature: | 48.3°F |
|
Sea Water Temperature: | 62.7°F |
|
Number of Sunny Days: | 8 days |
| Sunshine Hours: | 11.5 - 14.2 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.7 in | |
| detailed information | ||
forecast
| Lahti |
Temperature
| Lahti |
Air Temperature in September, °F
The highest day temperature in September 2025 was 78°F. The lowest night temperature was 36°F. The average values for day and night temperatures during September were 63.0°F и 51.4°F respectivly.
Lahti Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Lahti was 61.8°F. The maximum and minimum values were 57.2°F and 65.2°F respectively.
Most of the days in September are gloomy but you can also expect sunny days.
Precipitation Totals in September, in
Precipitation total in September for Lahti is 1.7 in.
The average wind speed in September is 6.7 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Lahti in September is 6.1 hours.
Lahti on the Weather Map
| Espoo |  |
+26 |
| Helsinki | |
+26 |
| Imatra |  |
+28 |
| Juvaskyla | |
+24 |
| Kemi | |
+26 |
| Lahti | |
+24 |
| Lappeenranta |  |
+22 |
| Oulu | |
+30 |
| Pori | |
+30 |
| Porvoo | |
+26 |
| Saariselka | |
+22 |
| Seinajoki | |
+30 |
| Turku | |
+30 |
| Vaasa | |
+30 |
| Vantaa |  |
+26 |
| 0600 |  |
24°F | NE 5 mph |
| 0900 |  |
32°F | NE 7 mph |
| 1200 | |
40°F | NE 9 mph |
| 1500 | |
44°F | NE 8 mph |
| 1800 |  |
34°F | NE 7 mph |
| 2100 |  |
32°F | NE 8 mph |
| 0000 | |
32°F | NE 8 mph |
| 0300 | |
30°F | NE 7 mph |