Average Weather in July in Dhamār Yemen
Daily high temperatures decrease by 3°F, from 80°F to 77°F, rarely falling below 72°F or exceeding 83°F.
Daily low temperatures are around 55°F, rarely falling below 52°F or exceeding 58°F. The highest daily average low temperature is 55°F on July 31.
For reference, on June 13, the hottest day of the year, temperatures in Dhamār typically range from 54°F to 81°F, while on December 30, the coldest day of the year, they range from 39°F to 70°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, 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 July
The month of July in Dhamār experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 69% throughout the month. The highest chance of overcast or mostly cloudy conditions is 70% on July 21.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 32% of the time.
For reference, on July 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 70%, while on November 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
Cloud Cover Categories in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Dhamār, the chance of a wet day over the course of July is increasing, starting the month at 2% and ending it at 7%.
For reference, the year's highest daily chance of a wet day is 8% on August 3, and its lowest chance is 1% on November 8.
Probability of Precipitation in July
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during July in Dhamār is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.0 inches.
Average Monthly Rainfall in July
Over the course of July in Dhamār, the length of the day is essentially constant. The shortest day of the month is July 31, with 12 hours, 46 minutes of daylight and the longest day is July 1, with 12 hours, 58 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Dhamār is 5:36 AM on July 1 and the latest sunrise is 9 minutes later at 5:45 AM on July 31.
The latest sunset is 6:35 PM on July 9 and the earliest sunset is 4 minutes earlier at 6:31 PM on July 31.
Daylight saving time is not observed in Dhamār during 2018.
For reference, on June 21, the longest day of the year, the Sun rises at 5:34 AM and sets 12 hours, 59 minutes later, at 6:33 PM, while on December 21, the shortest day of the year, it rises at 6:22 AM and sets 11 hours, 16 minutes later, at 5:38 PM.
Sunrise & Sunset with Twilight in July
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 chance that a given day will be muggy in Dhamār is essentially constant during July, remaining around 0% throughout.
For reference, on August 23, the muggiest day of the year, there are muggy conditions 1% of the time, while on November 3, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
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 Dhamār is essentially constant during July, remaining within 0.3 miles per hour of 7.0 miles per hour throughout.
For reference, on July 25, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on May 1, the calmest day of the year, the daily average wind speed is 5.6 miles per hour.
The highest daily average wind speed during July is 7.3 miles per hour on July 25.
Average Wind Speed in July
Wind Direction in July
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).
While it does not do so every year, freezing temperatures are seen in Dhamār over some winters. The day least likely to be in the growing season is January 1, with a 61% chance.
Time Spent in Various Temperature Bands and the Growing Season in July
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.
The average accumulated growing degree days in Dhamār are rapidly increasing during July, increasing by 479°F, from 2,259°F to 2,738°F, over the course of the month.
Growing Degree Days in July
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 in Dhamār is gradually decreasing during July, falling by 0.7 kWh, from 6.7 kWh to 6.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Dhamār are 14.543 deg latitude, 44.405 deg longitude, and 7,972 ft elevation.
The topography within 2 miles of Dhamār contains only modest variations in elevation, with a maximum elevation change of 279 feet and an average elevation above sea level of 7,950 feet. Within 10 miles contains only modest variations in elevation (2,795 feet). Within 50 miles contains large variations in elevation (8,609 feet).
The area within 2 miles of Dhamār is covered by grassland (47%), bare soil (34%), and sparse vegetation (11%), within 10 miles by grassland (49%) and bare soil (32%), and within 50 miles by bare soil (64%) and sparse vegetation (23%).
This report illustrates the typical weather in Dhamār year round, 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 Dhamār.
For each station, the records are corrected for the elevation difference between that station and Dhamār 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 Dhamār is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Dhamār and a given station.
The stations contributing to this reconstruction are: Dhamar (99%, 4.7 kilometers, north) and Ta'izz International Airport (0.6%, 100 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.