Monthly weather forecast in Helsinki
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|
| 24 September, Sunday. day, 13°; night, 9°; rain | 25 September, Monday. day, 12°; night, 10°; overcast | 26 September, Tuesday. day, 13°; night, 10°; overcast | 27 September, Wednesday. day, 12°; night, 10°; clear | 28 September, Thursday. day, 18°; night, 15°; partly cloudy | 29 September, Friday. day, 17°; night, 15°; light rain | 30 September, Saturday. day, 16°; night, 11°; light rain |
| 1 October, Sunday. day, 14°; night, 9°; partly cloudy | 2 October, Monday. day, 14°; night, 11°; partly cloudy | 3 October, Tuesday. day, 14°; night, 11°; light rain | 4 October, Wednesday. day, 12°; night, 8°; light rain | 5 October, Thursday. day, 11°; night, 9°; partly cloudy | 6 October, Friday. day, 11°; night, 7°; partly cloudy | 7 October, Saturday. day, 10°; night, 9°; overcast |
| 8 October, Sunday. day, 13°; night, 7°; overcast | 9 October, Monday. day, 6°; night, 6°; partly cloudy | 10 October, Tuesday. day, 7°; night, 6°; overcast | 11 October, Wednesday. day, 9°; night, 7°; clear | 12 October, Thursday. day, 9°; night, 4°; mostly clear | 13 October, Friday. day, 10°; night, 7°; partly cloudy | 14 October, Saturday. day, 10°; night, 6°; partly cloudy |
| 15 October, Sunday. day, 10°; night, 8°; partly cloudy | 16 October, Monday. day, 8°; night, 2°; overcast | 17 October, Tuesday. day, 2°; night, 1°; partly cloudy | 18 October, Wednesday. day, 2°; night, -1°; mostly clear | 19 October, Thursday. day, 1°; night, -1°; mostly clear | 20 October, Friday. day, -1°; night, -1°; partly cloudy | 21 October, Saturday. day, 1°; night, 1°; partly cloudy |
| 22 October, Sunday. day, 6°; night, 4°; partly cloudy | 23 October, Monday. day, 9°; night, 10°; partly cloudy | 24 October, Tuesday. day, 10°; night, 6°; partly cloudy | 25 October, Wednesday. day, 9°; night, 11°; partly cloudy | 26 October, Thursday. day, 13°; night, 12°; partly cloudy | 27 October, Friday. day, 11°; night, 9°; partly cloudy | Next, the average data for 10 years28 October, Saturday. day, 7°; night, 6°; overcast |
Average for 30 days
4 sunny days; 4 days with precipitation; 22 cloudy days;
air humidity 80%; 2 millimeters of precipitation (1% of annual average); Wind south-westerly 5.9 Meters per second; Water temperature +16°