Posio Temperature by Month
Posio, Lapland, Finland has an average annual maximum temperature of 5°C (41°F), ranging from -7°C (19°F) in January to 20°C (68°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Posio Monthly Temperatures
In Posio, temperatures can shift dramatically between pleasant in summer and very cold in winter. Nights follow the same pattern, with lows ranging from 11°C (52°F) in July to -14°C (7°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Posio by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak.
The chart below shows the average temperature throughout the year:
Temperature: Posio vs Finland
The map below shows the annual temperature across Finland. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Posio vs World: Temperature Compared
Posio's average annual maximum temperature is 5°C (41°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Posio?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Posio, January is the coolest month, with average highs of -7°C (19°F) and humidity around 86% — considered very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Posio this rarely lasts long on the ground.
For more on Posio's weather — including monthly rainfall, sunshine hours, and humidity — visit our Posio climate page.
