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Average Weather in Jämjö Sweden

In Jämjö, the summers are comfortable and partly cloudy and the winters are long, very cold, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 28°F to 69°F and is rarely below 14°F or above 77°F.

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

Climate Summary

very coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow58%58%28%28%overcastclearprecipitation: 2.0 inprecipitation: 2.0 in0.9 in0.9 inmuggy: 3%muggy: 3%0%0%drydrytourism score: 6.8tourism score: 6.80.00.0
Click on each chart for more information.

Temperature

The warm season lasts for 3.0 months, from June 10 to September 9, with an average daily high temperature above 63°F. The hottest day of the year is July 27, with an average high of 69°F and low of 55°F.

The cold season lasts for 4.1 months, from November 22 to March 25, with an average daily high temperature below 43°F. The coldest day of the year is February 9, with an average low of 28°F and high of 36°F.

Average High and Low Temperature

Average High and Low Temperature in JämjöwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 936°FFeb 936°FJul 2769°FJul 2769°F28°F28°F55°F55°FJun 1063°FJun 1063°FSep 963°FSep 963°FNov 2243°FNov 2243°FMar 2543°FMar 2543°F48°F48°F50°F50°F35°F35°F31°F31°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 JämjöJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldcoldcoldcoolcomfortablefreezing
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.

Kitimat, Canada (4,565 miles away) is the far-away foreign place with temperatures most similar to Jämjö (view comparison).

Clouds

In Jämjö, 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 Jämjö begins around April 16 and lasts for 5.9 months, ending around October 11. On June 24, 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 11 and lasts for 6.1 months, ending around April 16. On December 4, the cloudiest day of the year, the sky is overcast or mostly cloudy 72% of the time, and clear, mostly clear, or partly cloudy 28% of the time.

Cloud Cover Categories

Cloud Cover Categories in JämjöclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 2458%Jun 2458%Dec 428%Dec 428%Apr 1643%Apr 1643%Oct 1143%Oct 1143%NowNowclearmostly clearpartly cloudymostly cloudyovercast
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 Jämjö varies throughout the year.

The wetter season lasts 7.2 months, from June 13 to January 18, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 31% on November 13.

The drier season lasts 4.8 months, from January 18 to June 13. The smallest chance of a wet day is 16% on March 19.

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 throughout the year is rain alone, with a peak probability of 30% on November 12.

Daily Chance of Precipitation

Daily Chance of Precipitation in JämjöwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 1331%Nov 1331%Mar 1916%Mar 1916%Jan 125%Jan 125%Jun 1324%Jun 1324%Jan 1824%Jan 1824%NowNowrainsnow
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. Jämjö experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Jämjö. The most rain falls during the 31 days centered around July 20, with an average total accumulation of 2.0 inches.

The least rain falls around February 28, with an average total accumulation of 0.7 inches.

Average Monthly Rainfall

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

The sliding 31-day liquid-equivalent quantity of snowfall in Jämjö does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in JämjösnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inFeb 100.2 inFeb 100.2 inJul 300.0 inJul 300.0 inDec 10.1 inDec 10.1 inNowNow
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 Jämjö varies extremely over the course of the year. In 2021, the shortest day is December 21, with 6 hours, 54 minutes of daylight; the longest day is June 21, with 17 hours, 40 minutes of daylight.

Hours of Daylight and Twilight

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 4:07 AM on June 18, and the latest sunrise is 4 hours, 22 minutes later at 8:29 AM on December 28. The earliest sunset is at 3:20 PM on December 14, and the latest sunset is 6 hours, 29 minutes later at 9:48 PM on June 23.

Daylight saving time (DST) is observed in Jämjö 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 JämjöJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 184:07 AMJun 184:07 AM9:48 PMJun 239:48 PMJun 23Dec 143:20 PMDec 143:20 PM8:29 AMDec 288:29 AMDec 28Mar 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 Jämjö, 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 JämjöJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 190%Mar 190%Aug 13%Aug 13%NowNowcomfortablecomfortabledrydryhumidhumid
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 Jämjö experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from September 17 to March 18, with average wind speeds of more than 10.8 miles per hour. The windiest day of the year is January 6, with an average hourly wind speed of 13.1 miles per hour.

The calmer time of year lasts for 6.0 months, from March 18 to September 17. The calmest day of the year is May 24, with an average hourly wind speed of 8.5 miles per hour.

Average Wind Speed

Average Wind Speed in JämjöwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 613.1 mphJan 613.1 mphMay 248.5 mphMay 248.5 mphSep 1710.8 mphSep 1710.8 mphMar 1810.8 mphMar 1810.8 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 Jämjö varies throughout the year.

The wind is most often from the east for 1.6 weeks, from April 27 to May 8, with a peak percentage of 32% on May 7. The wind is most often from the west for 12 months, from May 8 to April 27, with a peak percentage of 46% on January 1.

Wind Direction

Wind Direction in JämjöWEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastsouthnorth
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

Jämjö 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 2.6 months, from June 29 to September 17, with an average temperature above 58°F. The day of the year with the warmest water is August 8, with an average temperature of 64°F.

The time of year with cooler water lasts for 4.5 months, from December 14 to April 29, with an average temperature below 41°F. The day of the year with the coolest water is March 2, with an average temperature of 36°F.

Average Water Temperature

Average Water Temperature in JämjöwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FAug 864°FAug 864°F36°FMar 236°FMar 2Jun 2958°FJun 2958°FSep 1758°FSep 1758°FDec 1441°FDec 1441°FApr 2941°FApr 2941°FNowNow
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 Jämjö 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 Jämjö for general outdoor tourist activities is from late June to late August, with a peak score in the last week of July.

Tourism Score

Tourism Score in Jämjöbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.80.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism 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 Jämjö for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in JämjöJanFebMarAprMayJunJulAugSepOctNovDec002244668810102.62.60.00.0NowNowprecipitationprecipitationcloudsclouds
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 Jämjö typically lasts for 5.5 months (171 days), from around May 3 to around October 21, rarely starting before April 17 or after May 19, and rarely ending before October 2 or after November 10.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Jämjögrowing 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 2150%Oct 2150%May 1990%May 1990%Oct 290%Oct 290%Apr 1710%Apr 1710%Nov 1010%Nov 1010%0%Feb 150%Feb 15Jul 26100%Jul 26100%NowNowfreezingvery coldcoldcoolcomfortablefrigid
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 Jämjö should appear around May 25, only rarely appearing before May 17 or after June 6.

Growing Degree Days

Growing Degree Days in JämjöJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°FMay 2590°FMay 2590°FAug 13900°FAug 13900°FDec 311,335°FDec 311,335°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 3.2 months, from May 4 to August 11, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is June 24, with an average of 6.5 kWh.

The darker period of the year lasts for 4.1 months, from October 20 to February 24, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest day of the year is December 25, with an average of 0.3 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in JämjöbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 246.5 kWhJun 246.5 kWhDec 250.3 kWhDec 250.3 kWhMay 45.2 kWhMay 45.2 kWhAug 115.2 kWhAug 115.2 kWhOct 201.6 kWhOct 201.6 kWhFeb 241.6 kWhFeb 241.6 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 Jämjö are 56.192 deg latitude, 15.841 deg longitude, and 89 ft elevation.

The topography within 2 miles of Jämjö contains only modest variations in elevation, with a maximum elevation change of 217 feet and an average elevation above sea level of 106 feet. Within 10 miles also contains only modest variations in elevation (404 feet). Within 50 miles contains only modest variations in elevation (932 feet).

The area within 2 miles of Jämjö is covered by trees (58%) and cropland (31%), within 10 miles by trees (46%) and water (38%), and within 50 miles by water (61%) and trees (30%).

Data Sources

This report illustrates the typical weather in Jämjö, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Jämjö.

For each station, the records are corrected for the elevation difference between that station and Jämjö 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 Jämjö is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jämjö and a given station.

The stations contributing to this reconstruction are: Ronneby Airport (69%, 36 kilometers, west) and Kalmar Airport (31%, 61 kilometers, northeast).

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.