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Average Weather in Yerevan Armenia

In Yerevan, the summers are hot and clear, the winters are freezing and partly cloudy, and it is dry year round. Over the course of the year, the temperature typically varies from 19°F to 92°F and is rarely below 8°F or above 99°F.

Climate Summary

very coldcoldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec98%98%52%52%clearovercastprecipitation: 1.1 inprecipitation: 1.1 in0.2 in0.2 inmuggy: 1%muggy: 1%0%0%drydrybeach/pool score: 8.8beach/pool score: 8.80.00.0
Click on each chart for more information.

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

Temperature

The hot season lasts for 3.5 months, from June 2 to September 18, with an average daily high temperature above 81°F. The hottest day of the year is July 28, with an average high of 92°F and low of 68°F.

The cold season lasts for 3.0 months, from November 28 to February 28, with an average daily high temperature below 48°F. The coldest day of the year is January 23, with an average low of 19°F and high of 37°F.

Average High and Low Temperature

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 YerevanJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldcoldcoldcoolcomfortablewarmwarmhotcoolfreezingvery coldfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Belleville, Kansas, United States (6,424 miles away) is the far-away foreign place with temperatures most similar to Yerevan (view comparison).

Clouds

In Yerevan, 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 Yerevan begins around May 31 and lasts for 4.2 months, ending around October 7. On August 17, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 98% of the time, and overcast or mostly cloudy 2% of the time.

The cloudier part of the year begins around October 7 and lasts for 7.8 months, ending around May 31. On April 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 48% of the time, and clear, mostly clear, or partly cloudy 52% of the time.

Cloud Cover Categories

Cloud Cover Categories in YerevanclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1798%Aug 1798%Apr 1252%Apr 1252%May 3175%May 3175%Oct 775%Oct 775%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 2.7 months, from April 6 to June 27, with a greater than 15% chance of a given day being a wet day. The chance of a wet day peaks at 24% on May 6.

The drier season lasts 9.3 months, from June 27 to April 6. The smallest chance of a wet day is 6% on January 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 Yerevan changes throughout the year.

Rain alone is the most common for 12 months, from January 15 to January 1. The highest chance of a day with rain alone is 24% on May 6.

Snow alone is the most common for 2.0 weeks, from January 1 to January 15. The highest chance of a day with snow alone is 3% on January 8.

Daily Chance of Precipitation

Daily Chance of Precipitation in YerevanrainJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 624%May 624%Jan 46%Jan 46%Jan 16%Jan 16%Apr 615%Apr 615%Jun 2715%Jun 2715%rainsnow
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. Yerevan experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.7 months, from March 23 to November 13, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 12, with an average total accumulation of 1.1 inches.

The rainless period of the year lasts for 4.3 months, from November 13 to March 23. The least rain falls around January 19, with an average total accumulation of 0.1 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 Yerevan 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 YerevansnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.2 in0.4 in0.6 in0.8 in1.0 in1.2 inJan 10.2 inJan 10.2 inJul 170.0 inJul 170.0 inDec 120.1 inDec 120.1 inFeb 130.1 inFeb 130.1 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 Yerevan varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 19 minutes of daylight; the longest day is June 21, with 15 hours, 2 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 5:31 AM on June 14, and the latest sunrise is 2 hours, 53 minutes later at 8:24 AM on January 4. The earliest sunset is at 5:35 PM on December 6, and the latest sunset is 2 hours, 59 minutes later at 8:35 PM on June 27.

Daylight saving time (DST) is not observed in Yerevan during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in YerevanJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:31 AMJun 145:31 AM8:35 PMJun 278:35 PMJun 27Dec 65:35 PMDec 65:35 PM8:24 AMJan 48:24 AMJan 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

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 Yerevan, 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 YerevanJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 110%Nov 110%Jul 191%Jul 191%comfortablecomfortabledrydryhumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

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 Yerevan experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.4 months, from February 6 to September 19, with average wind speeds of more than 4.9 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 5.9 miles per hour.

The calmer time of year lasts for 4.6 months, from September 19 to February 6. The calmest day of the year is January 1, with an average hourly wind speed of 3.9 miles per hour.

Average Wind Speed

Average Wind Speed in YerevanwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphApr 85.9 mphApr 85.9 mphJan 13.9 mphJan 13.9 mphSep 194.9 mphSep 194.9 mph
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 Yerevan varies throughout the year.

The wind is most often from the east for 5.6 months, from May 25 to November 12, with a peak percentage of 56% on July 27. The wind is most often from the west for 1.1 months, from November 12 to December 16 and for 4.9 months, from December 27 to May 25, with a peak percentage of 32% on December 9. The wind is most often from the south for 1.6 weeks, from December 16 to December 27, with a peak percentage of 33% on December 22.

Wind Direction

Wind Direction in YerevanWEWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 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 Yerevan 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 times of year to visit Yerevan for general outdoor tourist activities are from late May to late June and from late August to late September, with a peak score in the second week of September.

Tourism Score

Tourism Score in YerevanJanFebMarAprMayJunJulAugSepOctNovDec02468108.28.20.00.07.87.86.66.6 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Yerevan for hot-weather activities is from late June to early September, with a peak score in the second week of August.

Beach/Pool Score

Beach/Pool Score in Yerevanbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.88.80.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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 Yerevan typically lasts for 7.2 months (219 days), from around March 30 to around November 5, rarely starting before March 12 or after April 19, and rarely ending before October 18 or after November 22.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Yerevangrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 3050%Mar 3050%Nov 550%Nov 590%Apr 1990%Apr 1990%Oct 1890%Oct 1810%Mar 1210%Mar 1210%Nov 2210%Nov 220%Dec 220%Dec 22Jul 15100%Jul 15100%freezingvery coldcomfortablewarmhotfrigidcoldcoolsweltering
The percentage of time spent in various temperature bands: 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 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 Yerevan should appear around April 7, only rarely appearing before March 26 or after April 18.

Growing Degree Days

Growing Degree Days in YerevanJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°F4,000°FApr 788°FApr 788°FJun 11900°FJun 11900°FJul 171,800°FJul 171,800°FDec 313,928°FDec 313,928°F
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 20 to August 26, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is July 5, with an average of 8.0 kWh.

The darker period of the year lasts for 3.5 months, from October 30 to February 13, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 22, with an average of 2.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in YerevanbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJul 58.0 kWhJul 58.0 kWhDec 222.2 kWhDec 222.2 kWhMay 206.9 kWhMay 206.9 kWhAug 266.9 kWhAug 266.9 kWhOct 303.4 kWhOct 303.4 kWhFeb 133.4 kWhFeb 133.4 kWh
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 Yerevan are 40.181 deg latitude, 44.514 deg longitude, and 3,465 ft elevation.

The topography within 2 miles of Yerevan contains very significant variations in elevation, with a maximum elevation change of 1,293 feet and an average elevation above sea level of 3,475 feet. Within 10 miles contains very significant variations in elevation (4,344 feet). Within 50 miles also contains extreme variations in elevation (14,206 feet).

The area within 2 miles of Yerevan is covered by trees (36%), grassland (27%), shrubs (19%), and sparse vegetation (11%), within 10 miles by cropland (31%) and trees (22%), and within 50 miles by cropland (23%) and trees (18%).

Data Sources

This report illustrates the typical weather in Yerevan, 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 Yerevan.

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

The stations contributing to this reconstruction are: Erebuni Airport (88%, 3.7 kilometers, north) and Zvartnots International Airport (12%, 11 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 Tables of the Sun, Moon and Planets , 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 aiports 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.