Winter Weather in Vammala Finland

Daily high temperatures are around 28°F, rarely falling below 7°F or exceeding 42°F. The lowest daily average high temperature is 25°F on February 3.

Daily low temperatures decrease by 7°F, from 23°F to 16°F, rarely falling below -9°F or exceeding 36°F. The lowest daily average low temperature is 14°F on February 8.

For reference, on July 21, the hottest day of the year, temperatures in Vammala typically range from 53°F to 71°F, while on February 7, the coldest day of the year, they range from 14°F to 25°F.

The figure below shows you a compact characterization of the hourly average winter temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Anchorage, United States (3,965 miles away); Smithers, Canada (4,254 miles); and Laurium, United States (4,032 miles) are the far-away foreign places with temperatures most similar to Vammala (view comparison).

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The winter in Vammala experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 77% throughout the season. The highest chance of overcast or mostly cloudy conditions is 80% on January 28.

The clearest day of the winter is February 28, with clear, mostly clear, or partly cloudy conditions 26% of the time.

For reference, on January 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on July 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Vammala, the chance of a wet day over the course of the winter is very rapidly decreasing, starting the season at 28% and ending it at 17%.

For reference, the year's highest daily chance of a wet day is 34% on July 27, and its lowest chance is 17% on March 10.

Over the course of the winter in Vammala, the chance of a day with only rain decreases from 16% to 6%, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow remains an essentially constant 10% throughout.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Vammala is decreasing, starting the season at 1.1 inches, when it rarely exceeds 2.3 inches or falls below 0.2 inches, and ending the season at 0.4 inches, when it rarely exceeds 1.0 inches.

The lowest average 31-day accumulation is 0.4 inches on February 14.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the winter in Vammala is gradually decreasing, starting the season at 5.0 inches, when it rarely exceeds 9.8 inches or falls below 0.6 inches, and ending the season at 4.2 inches, when it rarely exceeds 8.4 inches or falls below 0.7 inches.

The highest average 31-day accumulation is 7.0 inches on January 16.

Over the course of the winter in Vammala, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 4 hours, 16 minutes, implying an average daily increase of 2 minutes, 52 seconds, and weekly increase of 20 minutes, 7 seconds.

The shortest day of the winter is December 21, with 5 hours, 24 minutes of daylight and the longest day is February 28, with 10 hours, 19 minutes of daylight.

The latest sunrise of the winter in Vammala is 9:45 AM on December 26 and the earliest sunrise is 2 hours, 13 minutes earlier at 7:32 AM on February 28.

The earliest sunset is 3:07 PM on December 16 and the latest sunset is 2 hours, 43 minutes later at 5:50 PM on February 28.

Daylight saving time is observed in Vammala during 2024, but it neither starts nor ends during the winter, so the entire season is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 3:47 AM and sets 19 hours, 26 minutes later, at 11:12 PM, while on December 21, the shortest day of the year, it rises at 9:44 AM and sets 5 hours, 24 minutes later, at 3:08 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the winter of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Vammala is essentially constant during the winter, remaining around 0% throughout.

For reference, on July 28, the muggiest day of the year, there are muggy conditions 2% of the time, while on September 12, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Vammala is essentially constant during the winter, remaining within 0.2 miles per hour of 5.7 miles per hour throughout.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 5.9 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 4.6 miles per hour.

The highest daily average wind speed during the winter is 5.9 miles per hour on January 2.

The hourly average wind direction in Vammala throughout the winter is predominantly from the south, with a peak proportion of 38% on February 23.

Vammala is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Vammala is rapidly decreasing during the winter, falling by 8°F, from 40°F to 32°F, over the course of the season.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Vammala typically lasts for 4.0 months (125 days), from around May 17 to around September 18, rarely starting before April 30 or after June 3, and rarely ending before August 31 or after October 6.

The winter in Vammala is reliably fully outside of the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Vammala are very rapidly decreasing during the winter, decreasing by 1,236°F, from 1,236°F to 0°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Vammala is increasing during the winter, rising by 1.1 kWh, from 0.2 kWh to 1.3 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 0.1 kWh on December 20.

For the purposes of this report, the geographical coordinates of Vammala are 61.333 deg latitude, 22.900 deg longitude, and 187 ft elevation.

The topography within 2 miles of Vammala contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 214 feet. Within 10 miles also contains only modest variations in elevation (358 feet). Within 50 miles contains only modest variations in elevation (689 feet).

The area within 2 miles of Vammala is covered by artificial surfaces (37%), cropland (26%), water (23%), and trees (14%), within 10 miles by trees (66%) and cropland (23%), and within 50 miles by trees (63%) and cropland (22%).