Porvoo in Fall
In fall (September, October and November), Porvoo sees average daytime highs around 9°C and overnight lows near 3°C, with 160 mm of precipitation over about 31 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 18°C in early September to 1°C by late November. The sky is clear or mostly clear about 13% of the time across fall, and the air most often feels dry.
Fall is Porvoo's 3rd-best season to visit on our travel score. For the whole year in context, see Porvoo's year-round climate.
- Avg daytime high
- 9°C
- 3rd-warmest season
- Avg overnight low
- 3°C
- Precipitation
- 160 mm
- 31 wet days
- Avg wind
- 13 km/h
- Travel score
- 2.0
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Porvoo in Fall
Over the season highs ease from about 18°C in early September to 1°C by late November.
A typical fall day in Porvoo reaches about 9°C and drops to 3°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Porvoo
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 48 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Porvoo weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -2° / -7° | 45 | 10.7 | 10.5 | 6.3 | 0.0 |
| Feb | -2° / -8° | 39 | 9 | 8.9 | 8.6 | 0.0 |
| Mar | 2° / -5° | 36 | 8.5 | 7.4 | 11.3 | 0.0 |
| Apr | 9° / 0° | 36 | 8.8 | 2.3 | 14.2 | 1.7 |
| May | 15° / 5° | 45 | 9.4 | 0.1 | 16.8 | 4.8 |
| Jun | 19° / 10° | 71 | 11.9 | 0 | 18.5 | 5.8 |
| Jul | 22° / 13° | 68 | 11.2 | 0 | 17.8 | 6.4 |
| Aug | 21° / 12° | 65 | 11.7 | 0 | 15.4 | 6.1 |
| Sep | 15° / 8° | 51 | 9.9 | 0 | 12.6 | 4.5 |
| Oct | 8° / 3° | 55 | 10.4 | 0.8 | 9.7 | 1.4 |
| Nov | 3° / -1° | 54 | 10.9 | 4.7 | 7.1 | 0.0 |
| Dec | -0° / -4° | 53 | 11.7 | 9.3 | 5.5 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 13% of the time across fall.
Chance of precipitation in Fall
Porvoo gets around 160 mm of rain and snow over 31 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 13 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 14 hours in early September to 6 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 1.3 kWh/m².
Is fall a good time to visit Porvoo?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Porvoo.
What to pack for Porvoo in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Porvoo sees daytime highs around 9°C and nights near 3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 31 days see rain.
Sea temperature near Porvoo in Fall
The nearest coast averages about 11°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 30 km away) is warmest in August at about 17°C and coldest in March near 1°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 1 | 1 | 2 | 6 | 12 | 16 | 17 | 15 | 10 | 7 | 4 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 1 | Bracing |
| Mar | 1 | Bracing |
| Apr | 2 | Bracing |
| May | 6 | Bracing |
| Jun | 12 | Bracing |
| Jul | 16 | Cool |
| Aug | 17 | Cool |
| Sep | 15 | Bracing |
| Oct | 10 | Bracing |
| Nov | 7 | Bracing |
| Dec | 4 | Bracing |
UV index in Porvoo in Fall
Clear-sky midday UV across fall averages around 1. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Porvoo peaks around June 18 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 3 | 4 | 5 | 5 | 4 | 2 | 1 | 0 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | High | Moderate | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Low |
| Apr | 3 | Moderate |
| May | 4 | Moderate |
| Jun | 5 | High |
| Jul | 5 | Moderate |
| Aug | 4 | Moderate |
| Sep | 2 | Moderate |
| Oct | 1 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Where is Porvoo?
Porvoo sits at 60.4°N, 25.7°E, 29 m above sea level, in Finland. The nearest listed city is Sibbo, 22 km away.
Topography around Porvoo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Porvoo.
Within 3 km, the terrain around Porvoo has only modest variations in elevation — a maximum elevation change of 58 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 98 m; within 80 km, only modest variations in elevation — a maximum elevation change of 226 m.
The land around Porvoo is covered by trees (51%) and artificial surfaces (22%) within 3 km, trees (61%) within 16 km, and trees (43%) and water (42%) within 80 km.
Finland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 85% of US
- price level, 2025
- GDP per capita
- $56,149
- 2025
- Happiness
- 7.8 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1
- per 100k, 2023
- Road deaths
- 3.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 603
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Porvoo (60.3923°, 25.6651°, elevation 29 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.