Average Weather in Jrashen Armenia
In Jrashen, the summers are hot and clear; the winters are short, freezing, and partly cloudy; and it is dry year round. Over the course of the year, the temperature typically varies from 21°F to 94°F and is rarely below 11°F or above 101°F.
Based on the beach/pool score, the best time of year to visit Jrashen for hot-weather activities is from late June to early September.
The hot season lasts for 3.5 months, from June 2 to September 18, with an average daily high temperature above 83°F. The hottest day of the year is July 24, with an average high of 94°F and low of 70°F.
The cold season lasts for 2.9 months, from November 29 to February 25, with an average daily high temperature below 48°F. The coldest day of the year is January 14, with an average low of 21°F and high of 36°F.
Average High and Low Temperature
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 Jrashen, 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 Jrashen begins around May 31 and lasts for 4.2 months, ending around October 6. 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 6 and lasts for 7.8 months, ending around May 31. On April 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 46% of the time, and clear, mostly clear, or partly cloudy 54% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Jrashen varies throughout the year.
The wetter season lasts 2.6 months, from April 7 to June 26, with a greater than 14% chance of a given day being a wet day. The chance of a wet day peaks at 23% on May 6.
The drier season lasts 9.4 months, from June 26 to April 7. The smallest chance of a wet day is 5% on August 26.
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 Jrashen changes throughout the year.
Rain alone is the most common for 11 months, from February 3 to December 31. The highest chance of a day with rain alone is 23% on May 6.
Snow alone is the most common for 1.1 months, from December 31 to February 3. The highest chance of a day with snow alone is 3% on January 9.
Daily Chance of Precipitation
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. Jrashen 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 1.0 inches.
The rainless period of the year lasts for 4.3 months, from November 13 to March 23. The least rain falls around January 16, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Jrashen 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
The length of the day in Jrashen varies significantly over the course of the year. In 2018, the shortest day is December 22, with 9 hours, 19 minutes of daylight; the longest day is June 21, with 15 hours, 1 minute of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:32 AM on June 14, and the latest sunrise is 2 hours, 52 minutes later at 8:24 AM on January 5. The earliest sunset is at 5:36 PM on December 8, and the latest sunset is 2 hours, 59 minutes later at 8:35 PM on June 28.
Daylight saving time (DST) is not observed in Jrashen during 2018.
Sunrise & Sunset with Twilight
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 Jrashen, 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, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
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 Jrashen 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 20, with average wind speeds of more than 4.8 miles per hour. The windiest day of the year is March 19, with an average hourly wind speed of 5.7 miles per hour.
The calmer time of year lasts for 4.5 months, from September 20 to February 6. The calmest day of the year is December 31, with an average hourly wind speed of 3.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Jrashen varies throughout the year.
The wind is most often from the west for 3.5 months, from February 13 to May 27, with a peak percentage of 39% on April 6. The wind is most often from the east for 8.5 months, from May 27 to February 13, with a peak percentage of 42% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Jrashen 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 Jrashen for general outdoor tourist activities are from late May to late June and from late August to early October, with a peak score in the second week of September.
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 Jrashen for hot-weather activities is from late June to early September, with a peak score in the third week of August.
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.
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 Jrashen typically lasts for 7.3 months (225 days), from around March 27 to around November 7, rarely starting before March 11 or after April 14, and rarely ending before October 20 or after November 23.
Time Spent in Various Temperature Bands and 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 Jrashen should appear around April 3, only rarely appearing before March 22 or after April 15.
Growing Degree Days
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 19 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 4, with an average of 8.1 kWh.
The darker period of the year lasts for 3.5 months, from October 31 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 2.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Jrashen are 40.053 deg latitude, 44.513 deg longitude, and 2,969 ft elevation.
The topography within 2 miles of Jrashen contains significant variations in elevation, with a maximum elevation change of 702 feet and an average elevation above sea level of 3,014 feet. Within 10 miles contains significant variations in elevation (3,241 feet). Within 50 miles contains large variations in elevation (14,206 feet).
The area within 2 miles of Jrashen is covered by cropland (63%), grassland (11%), and trees (10%), within 10 miles by cropland (42%) and trees (18%), and within 50 miles by cropland (22%) and shrubs (17%).
This report illustrates the typical weather in Jrashen, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Jrashen.
For each station, the records are corrected for the elevation difference between that station and Jrashen 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 Jrashen is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jrashen and a given station.
The stations contributing to this reconstruction are: Zvartnots International Airport (60%, 14 kilometers, northwest); Erebuni Airport (37%, 18 kilometers, north); and Iğdır Airport (3.7%, 81 kilometers, south).
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.
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.