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Climate and Average Weather Year Round in Slavyanovo Bulgaria

In Slavyanovo, the summers are warm and mostly clear and the winters are very cold, dry, and partly cloudy. Over the course of the year, the temperature typically varies from 24°F to 87°F and is rarely below 11°F or above 96°F.

Based on the beach/pool score, the best time of year to visit Slavyanovo for hot-weather activities is from late June to late August.

Climate in Slavyanovo

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow87%87%43%43%clearovercastprecipitation: 2.1 inprecipitation: 2.1 in0.9 in0.9 inmuggy: 21%muggy: 21%0%0%drydrybeach/pool score: 7.6beach/pool score: 7.60.00.0
Slavyanovo weather by month. Click on each chart for more information.

Average Temperature in Slavyanovo

The hot season lasts for 3.7 months, from May 25 to September 16, with an average daily high temperature above 77°F. The hottest day of the year is July 30, with an average high of 87°F and low of 63°F.

The cold season lasts for 3.1 months, from November 24 to February 28, with an average daily high temperature below 47°F. The coldest day of the year is January 20, with an average low of 24°F and high of 37°F.

Average High and Low Temperature in Slavyanovo

Average High and Low Temperature in SlavyanovohotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2037°FJan 2037°FJul 3087°FJul 3087°F24°F24°F63°F63°FMay 2577°FMay 2577°FSep 1677°FSep 1677°FNov 2447°FNov 2447°FFeb 2847°FFeb 2847°F55°F55°F54°F54°F33°F33°F30°F30°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 Slavyanovo

Average Hourly Temperature in SlavyanovoJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablecomfortablewarmhotfreezing
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.

Oxford, Ohio, United States (5,225 miles away) and Bowling Green, Maryland, United States (4,990 miles) are the far-away foreign places with temperatures most similar to Slavyanovo (view comparison).

Compare Slavyanovo to another city:

Clouds

In Slavyanovo, 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 Slavyanovo begins around June 9 and lasts for 3.5 months, ending around September 24. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 13% of the time.

The cloudier part of the year begins around September 24 and lasts for 8.5 months, ending around June 9. On December 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 57% of the time, and clear, mostly clear, or partly cloudy 43% of the time.

Cloud Cover Categories in Slavyanovo

Cloud Cover Categories in SlavyanovoclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2187%Jul 2187%Dec 1243%Dec 1243%Jun 965%Jun 965%Sep 2465%Sep 2465%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 Slavyanovo varies throughout the year.

The wetter season lasts 2.7 months, from April 27 to July 18, with a greater than 22% chance of a given day being a wet day. The chance of a wet day peaks at 32% on June 3.

The drier season lasts 9.3 months, from July 18 to April 27. The smallest chance of a wet day is 13% on January 24.

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 Slavyanovo changes throughout the year.

Rain alone is the most common for 11 months, from February 5 to December 27. The highest chance of a day with rain alone is 32% on June 3.

Snow alone is the most common for 1.3 months, from December 27 to February 5. The highest chance of a day with snow alone is 7% on December 30.

Daily Chance of Precipitation in Slavyanovo

Daily Chance of Precipitation in SlavyanovosnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 332%Jun 332%Jan 2413%Jan 2413%Dec 2718%Dec 2718%Apr 2722%Apr 2722%Jul 1822%Jul 1822%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. Slavyanovo experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from February 9 to December 31, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 13, with an average total accumulation of 2.1 inches.

The rainless period of the year lasts for 1.3 months, from December 31 to February 9. The least rain falls around January 19, with an average total accumulation of 0.4 inches.

Average Monthly Rainfall in Slavyanovo

Average Monthly Rainfall in SlavyanovorainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inJun 132.1 inJun 132.1 inJan 190.4 inJan 190.4 inSep 281.5 inSep 281.5 inDec 310.5 inDec 310.5 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. Slavyanovo experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.5 months, from November 3 to March 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 January 3, with an average total liquid-equivalent accumulation of 0.6 inches.

The snowless period of the year lasts for 7.5 months, from March 19 to November 3. The least snow falls around July 23, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall in Slavyanovo

Average Liquid-Equivalent Monthly Snowfall in SlavyanovosnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inJan 30.6 inJan 30.6 inJul 230.0 inJul 230.0 inNov 30.1 inNov 30.1 inMar 190.1 inMar 190.1 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 Slavyanovo varies significantly over the course of the year. In 2021, the shortest day is December 21, with 8 hours, 57 minutes of daylight; the longest day is June 21, with 15 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in Slavyanovo

Hours of Daylight and Twilight in SlavyanovoJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2015 hr, 25 minJun 2115 hr, 25 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 228 hr, 57 minDec 218 hr, 57 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 5:39 AM on June 15, and the latest sunrise is 2 hours, 14 minutes later at 7:53 AM on January 3. The earliest sunset is at 4:44 PM on December 10, and the latest sunset is 4 hours, 21 minutes later at 9:05 PM on June 26.

Daylight saving time (DST) is observed in Slavyanovo 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 Slavyanovo

Sunrise & Sunset with Twilight and Daylight Saving Time in SlavyanovoJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:39 AMJun 155:39 AM9:05 PMJun 269:05 PMJun 26Dec 104:44 PMDec 104:44 PM7:53 AMJan 37:53 AMJan 3Mar 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 Slavyanovo

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.

Slavyanovo experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.2 months, from May 31 to September 7, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The muggiest day of the year is July 29, with muggy conditions 21% of the time.

The least muggy day of the year is December 4, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Slavyanovo

Humidity Comfort Levels in SlavyanovomuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 40%Dec 40%Jul 2921%Jul 2921%May 315%May 315%Sep 75%Sep 75%NowNowmuggymuggyhumidhumidcomfortablecomfortabledrydry
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 Slavyanovo experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from November 13 to April 26, with average wind speeds of more than 7.5 miles per hour. The windiest day of the year is February 3, with an average hourly wind speed of 8.5 miles per hour.

The calmer time of year lasts for 6.6 months, from April 26 to November 13. The calmest day of the year is August 11, with an average hourly wind speed of 6.5 miles per hour.

Average Wind Speed in Slavyanovo

Average Wind Speed in SlavyanovowindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphFeb 38.5 mphFeb 38.5 mphAug 116.5 mphAug 116.5 mphNov 137.5 mphNov 137.5 mphApr 267.5 mphApr 267.5 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 Slavyanovo varies throughout the year.

The wind is most often from the east for 2.7 weeks, from August 5 to August 24, with a peak percentage of 35% on August 20. The wind is most often from the west for 11 months, from August 24 to August 5, with a peak percentage of 56% on January 1.

Wind Direction in Slavyanovo

Wind Direction in SlavyanovoWEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
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 Slavyanovo 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 Slavyanovo for general outdoor tourist activities is from late May to late September, with a peak score in the first week of September.

Tourism Score in Slavyanovo

Tourism Score in Slavyanovobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.47.40.10.16.86.8NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 Slavyanovo for hot-weather activities is from late June to late August, with a peak score in the first week of August.

Beach/Pool Score in Slavyanovo

Beach/Pool Score in Slavyanovobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.67.60.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 Slavyanovo typically lasts for 7.2 months (220 days), from around March 26 to around November 1, rarely starting before March 7 or after April 14, and rarely ending before October 16 or after November 17.

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

Time Spent in Various Temperature Bands and the Growing Season in Slavyanovogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2650%Mar 2650%Nov 150%Nov 190%Apr 1490%Apr 1490%Oct 1690%Oct 1610%Mar 710%Mar 710%Nov 1710%Nov 170%Jan 200%Jan 20Jul 12100%Jul 12100%freezingvery coldcoldcoolcomfortablewarmhotfrigid
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 Slavyanovo should appear around March 29, only rarely appearing before March 13 or after April 15.

Growing Degree Days in Slavyanovo

Growing Degree Days in SlavyanovoJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°FMar 2989°FMar 2989°FJun 8900°FJun 8900°FJul 191,800°FJul 191,800°FDec 313,494°FDec 313,494°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 3.3 months, from May 14 to August 22, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is July 7, with an average of 7.3 kWh.

The darker period of the year lasts for 3.5 months, from October 30 to February 15, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 15, with an average of 1.5 kWh.

Average Daily Incident Shortwave Solar Energy in Slavyanovo

Average Daily Incident Shortwave Solar Energy in SlavyanovobrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 77.3 kWhJul 77.3 kWhDec 151.5 kWhDec 151.5 kWhMay 146.2 kWhMay 146.2 kWhAug 226.2 kWhAug 226.2 kWhOct 302.7 kWhOct 302.7 kWhFeb 152.7 kWhFeb 152.7 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 Slavyanovo are 43.467 deg latitude, 24.867 deg longitude, and 443 ft elevation.

The topography within 2 miles of Slavyanovo contains only modest variations in elevation, with a maximum elevation change of 341 feet and an average elevation above sea level of 476 feet. Within 10 miles contains only modest variations in elevation (968 feet). Within 50 miles contains very significant variations in elevation (6,106 feet).

The area within 2 miles of Slavyanovo is covered by cropland (62%) and artificial surfaces (28%), within 10 miles by cropland (79%), and within 50 miles by cropland (66%) and trees (20%).

Data Sources

This report illustrates the typical weather in Slavyanovo, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Slavyanovo.

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

The stations contributing to this reconstruction are: Dolna Mitropoliya Air Base (LBPL, 66%, 30 kilometers, west); Gorna Orechovista (LBGO, 16%, 77 kilometers, southeast); Ruse Airport (LBRS, 11%, 97 kilometers, northeast); and Graf Ignatievo (LBPG, 7%, 131 kilometers, south).

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.