1. WeatherSpark.com
  2. Finland
  3. Kymenlaakso

Average Weather in Hamina Finland

In Hamina, the summers are comfortable and partly cloudy and the winters are freezing, dry, and overcast. Over the course of the year, the temperature typically varies from 17°F to 71°F and is rarely below -2°F or above 80°F.

Based on the tourism score, the best time of year to visit Hamina for warm-weather activities is from late June to mid August.

Climate Summary

freezingvery coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow58%58%20%20%overcastclearprecipitation: 2.3 inprecipitation: 2.3 in1.0 in1.0 inmuggy: 2%muggy: 2%0%0%drydrytourism score: 6.9tourism score: 6.90.00.0
Click on each chart for more information.

Temperature

The warm season lasts for 3.0 months, from June 4 to September 3, with an average daily high temperature above 62°F. The hottest day of the year is July 24, with an average high of 71°F and low of 57°F.

The cold season lasts for 3.7 months, from November 30 to March 20, with an average daily high temperature below 35°F. The coldest day of the year is February 7, with an average low of 17°F and high of 26°F.

Average High and Low Temperature

Average High and Low Temperature in HaminawarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec-10°F-10°F0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 726°FFeb 726°FJul 2471°FJul 2471°F17°F17°F57°F57°FJun 462°FJun 462°FSep 362°FSep 362°FNov 3035°FNov 3035°FMar 2035°FMar 2035°F47°F47°F50°F50°F28°F28°F24°F24°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. 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.

Average Hourly Temperature

Average Hourly Temperature in HaminaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Stephenville Crossing, Canada (3,277 miles away) is the far-away foreign place with temperatures most similar to Hamina (view comparison).

Clouds

In Hamina, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Hamina begins around April 21 and lasts for 5.6 months, ending around October 9. On July 17, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 58% of the time, and overcast or mostly cloudy 42% of the time.

The cloudier part of the year begins around October 9 and lasts for 6.4 months, ending around April 21. On January 23, the cloudiest day of the year, the sky is overcast or mostly cloudy 80% of the time, and clear, mostly clear, or partly cloudy 20% of the time.

Cloud Cover Categories

Cloud Cover Categories in HaminaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 1758%Jul 1758%Jan 2320%Jan 2320%Apr 2139%Apr 2139%Oct 940%Oct 940%NowNowclearmostly clearmostly cloudyovercastpartly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Hamina varies throughout the year.

The wetter season lasts 7.6 months, from June 6 to January 26, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 33% on November 10.

The drier season lasts 4.4 months, from January 26 to June 6. The smallest chance of a wet day is 18% on March 4.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Hamina changes throughout the year.

Rain alone is the most common for 10 months, from March 3 to January 14. The highest chance of a day with rain alone is 32% on October 22.

Snow alone is the most common for 1.6 months, from January 14 to March 3. The highest chance of a day with snow alone is 12% on January 26.

Daily Chance of Precipitation

Daily Chance of Precipitation in HaminasnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 1033%Nov 1033%Mar 418%Mar 418%Jan 1426%Jan 1426%Jan 128%Jan 128%Jun 626%Jun 626%NowNowsnowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Hamina experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 12 months, from February 24 to February 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around October 11, with an average total accumulation of 2.3 inches.

The rainless period of the year lasts for 1.9 weeks, from February 11 to February 24. The least rain falls around February 18, with an average total accumulation of 0.5 inches.

Average Monthly Rainfall

Average Monthly Rainfall in HaminarainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inOct 112.3 inOct 112.3 inFeb 180.5 inFeb 180.5 inAug 252.3 inAug 252.3 inJun 242.2 inJun 242.2 inNowNow
The average rainfall (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 thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Hamina experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.7 months, from October 29 to April 21, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 28, with an average total liquid-equivalent accumulation of 0.6 inches.

The snowless period of the year lasts for 6.3 months, from April 21 to October 29. The least snow falls around August 1, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in HaminasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 inJan 280.6 inJan 280.6 inAug 10.0 inAug 10.0 inOct 290.1 inOct 290.1 inApr 210.1 inApr 210.1 in
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 thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Hamina varies extremely over the course of the year. In 2021, the shortest day is December 21, with 5 hours, 41 minutes of daylight; the longest day is June 21, with 19 hours, 6 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in HaminaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2019 hr, 6 minJun 2119 hr, 6 minJun 2112 hr, 16 minSep 2212 hr, 16 minSep 225 hr, 41 minDec 215 hr, 41 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 3:39 AM on June 19, and the latest sunrise is 5 hours, 40 minutes later at 9:20 AM on December 27. The earliest sunset is at 2:58 PM on December 16, and the latest sunset is 7 hours, 47 minutes later at 10:45 PM on June 22.

Daylight saving time (DST) is observed in Hamina during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in HaminaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 193:39 AMJun 193:39 AM10:45 PMJun 2210:45 PMJun 22Dec 162:58 PMDec 162:58 PM9:20 AMDec 279:20 AMDec 27Mar 28DSTMar 28DSTDSTOct 31DSTOct 31daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

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 perceived humidity level in Hamina, 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 1% of 1% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in HaminaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 60%Nov 60%Jul 312%Jul 312%drydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Hamina experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.7 months, from September 16 to March 6, with average wind speeds of more than 7.9 miles per hour. The windiest day of the year is December 12, with an average hourly wind speed of 9.7 miles per hour.

The calmer time of year lasts for 6.3 months, from March 6 to September 16. The calmest day of the year is July 3, with an average hourly wind speed of 6.2 miles per hour.

Average Wind Speed

Average Wind Speed in HaminawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphDec 129.7 mphDec 129.7 mphJul 36.2 mphJul 36.2 mphSep 167.9 mphSep 167.9 mphMar 67.9 mphMar 67.9 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Hamina varies throughout the year.

The wind is most often from the south for 3.2 months, from January 21 to April 28 and for 1.6 months, from October 29 to December 17, with a peak percentage of 35% on November 25. The wind is most often from the west for 6.0 months, from April 28 to October 29 and for 1.1 months, from December 17 to January 21, with a peak percentage of 35% on October 2.

Wind Direction

Wind Direction in HaminaWSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
northeastsouthwest
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 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Hamina 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 water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.5 months, from July 2 to September 17, with an average temperature above 57°F. The day of the year with the warmest water is August 5, with an average temperature of 63°F.

The time of year with cooler water lasts for 4.7 months, from December 10 to May 1, with an average temperature below 38°F. The day of the year with the coolest water is February 25, with an average temperature of 31°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Hamina throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Hamina for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July.

Tourism Score

Tourism Score in Haminabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.90.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Hamina for hot-weather activities is from mid July to early August, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score in HaminaJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.03.00.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing 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 Hamina typically lasts for 5.4 months (167 days), from around May 3 to around October 16, rarely starting before April 15 or after May 20, and rarely ending before September 28 or after November 7.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Haminagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 350%May 350%Oct 1650%Oct 1650%May 2090%May 2090%Sep 2890%Sep 2890%Apr 1510%Apr 1510%Nov 710%Nov 710%Jul 24100%Jul 24100%NowNowfrigidfreezingvery coldcoolcoldcomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within 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.

Based on growing degree days alone, the first spring blooms in Hamina should appear around May 25, only rarely appearing before May 15 or after June 7.

Growing Degree Days

Growing Degree Days in HaminaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°FMay 2590°FMay 2590°FAug 8900°FAug 8900°FDec 311,296°FDec 311,296°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.1 months, from May 6 to August 10, with an average daily incident shortwave energy per square meter above 5.0 kWh. The brightest day of the year is June 29, with an average of 6.2 kWh.

The darker period of the year lasts for 4.5 months, from October 13 to February 27, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest day of the year is December 21, with an average of 0.1 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in HaminabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 296.2 kWhJun 296.2 kWhDec 210.1 kWhDec 210.1 kWhMay 65.0 kWhMay 65.0 kWhAug 105.0 kWhAug 105.0 kWhOct 131.3 kWhOct 131.3 kWhFeb 271.3 kWhFeb 271.3 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Hamina are 60.570 deg latitude, 27.198 deg longitude, and 36 ft elevation.

The topography within 2 miles of Hamina contains only modest variations in elevation, with a maximum elevation change of 102 feet and an average elevation above sea level of 22 feet. Within 10 miles also contains only modest variations in elevation (295 feet). Within 50 miles contains only modest variations in elevation (604 feet).

The area within 2 miles of Hamina is covered by artificial surfaces (42%), trees (23%), cropland (14%), and herbaceous vegetation (11%), within 10 miles by trees (52%) and water (25%), and within 50 miles by water (46%) and trees (42%).

Data Sources

This report illustrates the typical weather in Hamina, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Hamina.

For each station, the records are corrected for the elevation difference between that station and Hamina according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Hamina is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hamina and a given station.

The stations contributing to this reconstruction are: Utti Airport (63%, 39 kilometers, north); Lappeenranta Airport (25%, 74 kilometers, northeast); and Helsinki-Malmi Airport (12%, 124 kilometers, west).

Other Data

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.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

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.