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Climate and Average Weather Year Round in Kotlje Slovenia

In Kotlje, the summers are comfortable and wet, the winters are freezing and dry, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 21°F to 77°F and is rarely below 9°F or above 86°F.

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

Climate in Kotlje

very coldcoldcoolcomfortablewarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow65%65%36%36%overcastclearprecipitation: 3.9 inprecipitation: 3.9 in1.2 in1.2 inmuggy: 3%muggy: 3%0%0%drydrytourism score: 6.9tourism score: 6.90.00.0
Kotlje weather by month. Click on each chart for more information.

Average Temperature in Kotlje

The warm season lasts for 3.5 months, from May 27 to September 10, with an average daily high temperature above 68°F. The hottest day of the year is August 1, with an average high of 77°F and low of 55°F.

The cold season lasts for 3.2 months, from November 20 to February 27, with an average daily high temperature below 42°F. The coldest day of the year is January 13, with an average low of 21°F and high of 33°F.

Average High and Low Temperature in Kotlje

Average High and Low Temperature in KotljewarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1333°FJan 1333°FAug 177°FAug 177°F21°F21°F55°F55°FMay 2768°FMay 2768°FSep 1068°FSep 1068°FNov 2042°FNov 2042°FFeb 2742°FFeb 2742°F48°F48°F49°F49°F30°F30°F25°F25°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 in Kotlje

Average Hourly Temperature in KotljeJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablewarm
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.

Nakusp, Canada (5,187 miles away) and Banner Elk, North Carolina, United States (4,758 miles) are the far-away foreign places with temperatures most similar to Kotlje (view comparison).

Compare Kotlje to another city:

Clouds

In Kotlje, 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 Kotlje begins around June 12 and lasts for 3.4 months, ending around September 25. On July 22, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 65% of the time, and overcast or mostly cloudy 35% of the time.

The cloudier part of the year begins around September 25 and lasts for 8.6 months, ending around June 12. On November 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 64% of the time, and clear, mostly clear, or partly cloudy 36% of the time.

Cloud Cover Categories in Kotlje

Cloud Cover Categories in KotljeclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2265%Jul 2265%Nov 2036%Nov 2036%Jun 1250%Jun 1250%Sep 2551%Sep 2551%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 Kotlje varies throughout the year.

The wetter season lasts 5.2 months, from April 20 to September 28, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 40% on June 12.

The drier season lasts 6.8 months, from September 28 to April 20. The smallest chance of a wet day is 14% on January 21.

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 Kotlje changes throughout the year.

Rain alone is the most common for 11 months, from January 29 to December 30. The highest chance of a day with rain alone is 40% on June 12.

Snow alone is the most common for 4.3 weeks, from December 30 to January 29. The highest chance of a day with snow alone is 8% on January 1.

Daily Chance of Precipitation in Kotlje

Daily Chance of Precipitation in KotljesnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1240%Jun 1240%Jan 2114%Jan 2114%Dec 3017%Dec 3017%Apr 2027%Apr 2027%Sep 2827%Sep 2827%NowNowrainsnowmixed
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. Kotlje experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Kotlje. The most rain falls during the 31 days centered around August 31, with an average total accumulation of 3.9 inches.

The least rain falls around January 20, with an average total accumulation of 0.6 inches.

Average Monthly Rainfall in Kotlje

Average Monthly Rainfall in KotljeJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inAug 313.9 inAug 313.9 inJan 200.6 inJan 200.6 inJun 223.8 inJun 223.8 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. Kotlje experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.8 months, from October 24 to April 19, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 9, with an average total liquid-equivalent accumulation of 0.6 inches.

The snowless period of the year lasts for 6.2 months, from April 19 to October 24. The least snow falls around July 29, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall in Kotlje

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 Kotlje varies significantly over the course of the year. In 2021, the shortest day is December 21, with 8 hours, 34 minutes of daylight; the longest day is June 21, with 15 hours, 50 minutes of daylight.

Hours of Daylight and Twilight in Kotlje

Hours of Daylight and Twilight in KotljeJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2015 hr, 50 minJun 2115 hr, 50 minJun 2112 hr, 11 minSep 2212 hr, 11 minSep 228 hr, 34 minDec 218 hr, 34 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 5:06 AM on June 16, and the latest sunrise is 2 hours, 38 minutes later at 7:44 AM on January 1. The earliest sunset is at 4:12 PM on December 10, and the latest sunset is 4 hours, 45 minutes later at 8:57 PM on June 26.

Daylight saving time (DST) is observed in Kotlje 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 in Kotlje

Sunrise & Sunset with Twilight and Daylight Saving Time in KotljeJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 165:06 AMJun 165:06 AM8:57 PMJun 268:57 PMJun 26Dec 104:12 PMDec 104:12 PM7:44 AMJan 17:44 AMJan 1Mar 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 in Kotlje

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 Kotlje, 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.

Humidity Comfort Levels in Kotlje

Humidity Comfort Levels in KotljeJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 170%Nov 170%Jul 223%Jul 223%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 Kotlje experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.9 months, from November 23 to May 19, with average wind speeds of more than 3.8 miles per hour. The windiest day of the year is March 12, with an average hourly wind speed of 4.5 miles per hour.

The calmer time of year lasts for 6.1 months, from May 19 to November 23. The calmest day of the year is August 10, with an average hourly wind speed of 3.2 miles per hour.

Average Wind Speed in Kotlje

Average Wind Speed in KotljewindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphMar 124.5 mphMar 124.5 mphAug 103.2 mphAug 103.2 mphNov 233.8 mphNov 233.8 mphMay 193.8 mphMay 193.8 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 Kotlje varies throughout the year.

The wind is most often from the north for 4.0 weeks, from April 1 to April 29 and for 2.9 months, from June 23 to September 19, with a peak percentage of 31% on July 21. The wind is most often from the west for 1.4 weeks, from April 29 to May 9 and for 6.3 months, from September 23 to April 1, with a peak percentage of 27% on April 29. The wind is most often from the south for 1.5 months, from May 9 to June 23 and for 4.0 days, from September 19 to September 23, with a peak percentage of 29% on June 10.

Wind Direction in Kotlje

Wind Direction in KotljeWNSNWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

Best Time of Year to Visit

To characterize how pleasant the weather is in Kotlje 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 Kotlje for general outdoor tourist activities is from late June to late August, with a peak score in the first week of August.

Tourism Score in Kotlje

Tourism Score in Kotljebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.90.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 Kotlje for hot-weather activities is from early July to mid August, with a peak score in the last week of July.

Beach/Pool Score in Kotlje

Beach/Pool Score in KotljeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.54.50.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
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 Kotlje typically lasts for 5.8 months (177 days), from around April 20 to around October 14, rarely starting before April 2 or after May 9, and rarely ending before September 28 or after October 31.

Time Spent in Various Temperature Bands and the Growing Season in Kotlje

Time Spent in Various Temperature Bands and the Growing Season in Kotljegrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2050%Apr 2050%Oct 1450%Oct 1450%May 990%May 990%Sep 2890%Sep 2890%Apr 210%Apr 210%Oct 3110%Oct 3110%0%Feb 40%Feb 4Jul 28100%Jul 28100%NowNowfreezingvery coldcoldcoolcomfortablewarmfrigid
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 Kotlje should appear around April 25, only rarely appearing before April 13 or after May 9.

Growing Degree Days in Kotlje

Growing Degree Days in KotljeJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°FApr 2590°FApr 2590°FJul 14900°FJul 14900°FSep 291,800°FSep 291,800°FDec 311,894°FDec 311,894°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 3.5 months, from May 2 to August 18, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is July 9, with an average of 6.5 kWh.

The darker period of the year lasts for 3.4 months, from October 28 to February 12, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest day of the year is December 14, with an average of 1.2 kWh.

Average Daily Incident Shortwave Solar Energy in Kotlje

Average Daily Incident Shortwave Solar Energy in KotljebrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 96.5 kWhJul 96.5 kWhDec 141.2 kWhDec 141.2 kWhMay 25.5 kWhMay 25.5 kWhAug 185.5 kWhAug 185.5 kWhOct 282.3 kWhOct 282.3 kWhFeb 122.3 kWhFeb 122.3 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 Kotlje are 46.521 deg latitude, 14.987 deg longitude, and 1,467 ft elevation.

The topography within 2 miles of Kotlje contains large variations in elevation, with a maximum elevation change of 2,638 feet and an average elevation above sea level of 1,881 feet. Within 10 miles contains large variations in elevation (5,909 feet). Within 50 miles also contains extreme variations in elevation (7,851 feet).

The area within 2 miles of Kotlje is covered by trees (62%) and cropland (28%), within 10 miles by trees (69%) and cropland (15%), and within 50 miles by trees (57%) and cropland (27%).

Data Sources

This report illustrates the typical weather in Kotlje, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Kotlje.

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

The stations contributing to this reconstruction are: Celje Airport (LJCL, 25%, 37 kilometers, southeast); Klagenfurt Airport (LOWK, 18%, 52 kilometers, west); Ljubljana Jože Pučnik Airport (LJLJ, 18%, 52 kilometers, southwest); Maribor Edvard Rusjan Airport (LJMB, 16%, 54 kilometers, east); Graz Airport (LOWG, 14%, 63 kilometers, northeast); and Zeltweg Airport (LOXZ, 9%, 78 kilometers, north).

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.