Yes
you do need a jacket based on the weather in Koukkukatu 1, 15700 Lahti, Finland 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
50°F10°C & Clear
Wind is 2 mph4 km/h from the SW, gusting to 4 mph7 km/h
| May 18 | ||||
| 8pm | 50°F10°C | 3 mph4 km/h SW | Clear | |
| 9pm | 50°F10°C | 2 mph4 km/h SW | Clear | |
| 10pm | 49°F9°C | 3 mph5 km/h SW | Mostly Clear | |
| 11pm | 51°F10°C | 3 mph5 km/h SW | Clear | |
| May 19 | ||||
| 12am | 55°F13°C | 3 mph5 km/h SW | Clear | |
| 1am | 59°F15°C | 4 mph6 km/h SW | Clear | |
| 2am | 63°F17°C | 5 mph7 km/h SW | Clear | |
| 3am | 67°F19°C | 6 mph9 km/h SW | Clear | |
| 4am | 69°F21°C | 6 mph10 km/h SW | Clear | |
| 5am | 72°F22°C | 7 mph11 km/h SW | Clear | |
| 6am | 74°F23°C | 8 mph13 km/h SW | Mostly Clear | |
| 7am | 75°F24°C | 9 mph14 km/h SW | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 18 | 49°F9°C | 76°F25°C | 8 mph12 km/h from SW | Clear | Mostly Clear |
| May 19 | 49°F9°C | 64°F18°C | 7 mph12 km/h from N | Partly Cloudy | Mostly Clear |
| May 20 | 44°F6°C | 66°F19°C | 4 mph7 km/h from NE | Mostly Clear | Clear |
| May 21 | 47°F8°C | 73°F23°C | 2 mph4 km/h from E | Mostly Clear | Clear |
| May 22 | 49°F9°C | 73°F23°C | 7 mph11 km/h from SE | Mostly Clear | Mostly Clear |
| May 23 | 51°F11°C | 78°F26°C | 8 mph12 km/h from S | Mostly Clear | Mostly Clear |
| May 24 | 54°F12°C | 80°F27°C | 6 mph10 km/h from W | Partly Cloudy | Mostly Clear |
Yes
Low of 49°F10°C, High of 64°F18°CWind: 7 mph12 km/h
Precipitation: None