Time zones for airports and weather stations are provided by AskGeo.com . The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. 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 first month of the winter, December, is also a wintry month, with average temperature ranging between max 0.5°C (32.9°F) and min -4.5°C (23.9°F). Low Temp: 19 °F. Stephenville Crossing, Canada (3,219 miles away) and Haines, Alaska, United States (4,124 miles) are the far-away foreign places with temperatures most similar to Helsinki (view comparison). The average high during this season is between 37.1°F (2.8°C) and 26.7°F (-2.9°C). The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. The average maximum temperature lies around … These times of year are fairly slow with tourists. The earliest sunrise is at 3:53 AM on June 19, and the latest sunrise is 5 hours, 32 minutes later at 9:25 AM on December 27. Rain falls throughout the year in Helsinki. Viherkumpu Based on this score, the best time of year to visit Helsinki for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. The percentage of time spent in various temperature bands. Note that these seasonal averages are in contrast with those observed in Helsinki in april with a maximum record of 65°F in 2009 and a minimum record of 23°F in 2012. 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. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The perceived humidity level in Helsinki, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 2% of 2% throughout. Helsinki is located near a large body of water (e.g., ocean, sea, or large lake). The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The warmest month of the year is July, with an average temperature of 17.0 °C | 62.6 °F. All Year January February March April May June July August September October November December. The windier part of the year lasts for 5.7 months, from September 16 to March 6, with average wind speeds of more than 9.2 miles per hour. Hämeenlinna Hyvinkää The weather in Helsinki in December is extremely cold, when degrees are between -3 and 2 and there are 17 days of rain and 11 days of snow in average. February is the coldest month, with an average high-temperature of -1.9°C (28.6°F) and an average low-temperature of -7.4°C (18.7°F). The smallest chance of a wet day is 17% on February 28. Weather on Christmas Eve beginning from 1981. January February March April May June July August September October November December; Avg. Get the monthly weather forecast for Helsinki, Uusimaa, Finland, including daily high/low, historical averages, to help you plan ahead. The average minimum temperature (usually the minimum temperature is noted during the night) in Helsinki in January is -10.0°C (14°F). All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. support@__remove_this_part__weatherspark.com. February has the lowest average temperature of the year. Like much of the country, Helsinki experiences long summer days and very low sun during the winter. The thin dotted line is the corresponding average liquid-equivalent snowfall. The highest chance of a day with snow alone is 10% on January 26. The windiest day of the year is December 12, with an average hourly wind speed of 11.3 miles per hour. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The transitions to and from daylight saving time are indicated by the 'DST' labels. The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The solar day over the course of the year 2020. The stations contributing to this reconstruction are: Helsinki-Malmi Airport (95%, 11 kilometers, northeast) and Tallinn Airport (4.6%, 84 kilometers, south). The day of the year with the warmest water is August 4, with an average temperature of 63Â°F. Kirkkonummi On average, the recorded minimum temperature is 25°F. In Helsinki, the annual water temperature (Gulf of Finland) is on average 7.90°C | 46.22°F. For the purposes of this report, the geographical coordinates of Helsinki are 60.170 deg latitude, 24.935 deg longitude, and 85 ft elevation. The darkest day of the year is December 20, with an average of 0.2 kWh. The temperature here averages 5.1 °C | 41.2 °F. In this report, we use a base of 50Â°F and a cap of 86Â°F. Espoo The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. The wettest month is August with an average of 90mm of rain. Our beach/pool temperature score is 0 for perceived temperatures below 65Â°F, rising linearly to 9 for 75Â°F, to 10 for 82Â°F, falling linearly to 9 for 90Â°F, and to 1 for 100Â°F or hotter. As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Snow alone is the most common for 4.1 weeks, from January 17 to February 15. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. Rain may fall as snow in this month. The amount of rain/snow in December is normal with an average of 58mm (2.3in). The weather in Helsinki in January is extremely cold, when degrees are between -4 and 0 and there are 19 days of rain and 14 days of snow in average. 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