Average Weather in Mehtar Lām Afghanistan
In Mehtar Lām, the summers are long, hot, and clear; the winters are very cold and partly cloudy; and it is dry year round. Over the course of the year, the temperature typically varies from 31°F to 97°F and is rarely below 22°F or above 102°F.
Based on the beach/pool score, the best time of year to visit Mehtar Lām for hot-weather activities is from early June to early September.
The hot season lasts for 4.0 months, from May 20 to September 19, with an average daily high temperature above 87°F. The hottest day of the year is July 6, with an average high of 97°F and low of 75°F.
The cold season lasts for 3.0 months, from December 5 to March 7, with an average daily high temperature below 57°F. The coldest day of the year is January 24, with an average low of 31°F and high of 47°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
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
Mannford, Oklahoma, United States (7,477 miles away) and Memphis, Tennessee, United States (7,455 miles) are the far-away foreign places with temperatures most similar to Mehtar Lām (view comparison).
In Mehtar Lām, 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 Mehtar Lām begins around May 11 and lasts for 6.1 months, ending around November 13. On September 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 99% of the time, and overcast or mostly cloudy 1% of the time.
The cloudier part of the year begins around November 13 and lasts for 5.9 months, ending around May 11. On March 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Mehtar Lām varies throughout the year.
The wetter season lasts 3.2 months, from January 28 to May 3, with a greater than 14% chance of a given day being a wet day. The chance of a wet day peaks at 23% on March 18.
The drier season lasts 8.8 months, from May 3 to January 28. The smallest chance of a wet day is 5% on November 23.
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 throughout the year is rain alone, with a peak probability of 23% on March 19.
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. Mehtar Lām experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from December 31 to November 22, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around March 24, with an average total accumulation of 2.1 inches.
The rainless period of the year lasts for 1.3 months, from November 22 to December 31. The least rain falls around December 15, with an average total accumulation of 0.5 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Mehtar Lām 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 Mehtar Lām varies significantly over the course of the year. In 2018, the shortest day is December 22, with 9 hours, 50 minutes of daylight; the longest day is June 21, with 14 hours, 29 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:35 AM on June 13, and the latest sunrise is 2 hours, 21 minutes later at 6:56 AM on January 7. The earliest sunset is at 4:38 PM on December 5, and the latest sunset is 2 hours, 28 minutes later at 7:06 PM on June 29.
Daylight saving time (DST) is not observed in Mehtar Lām 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 Mehtar Lām, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Mehtar Lām experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 2.2 months, from April 28 to July 1, with average wind speeds of more than 5.1 miles per hour. The windiest day of the year is June 2, with an average hourly wind speed of 6.3 miles per hour.
The calmer time of year lasts for 9.9 months, from July 1 to April 28. The calmest day of the year is November 21, with an average hourly wind speed of 3.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Mehtar Lām varies throughout the year.
The wind is most often from the west for 4.3 weeks, from January 24 to February 23 and for 9.4 months, from March 17 to December 28, with a peak percentage of 66% on June 2. The wind is most often from the east for 3.1 weeks, from February 23 to March 17, with a peak percentage of 31% on March 6. The wind is most often from the north for 3.9 weeks, from December 28 to January 24, with a peak percentage of 33% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Mehtar Lām 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 Mehtar Lām for general outdoor tourist activities are from mid May to early June and from late August to mid October, with a peak score in the last 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 Mehtar Lām for hot-weather activities is from early June to early September, with a peak score in the first week of July.
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 Mehtar Lām typically lasts for 9.7 months (292 days), from around February 25 to around December 14, rarely starting before February 5 or after March 18, and rarely ending before November 23 or after January 1.
Time Spent in Various Temperature Bands and the Growing Season
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
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 Mehtar Lām should appear around March 15, only rarely appearing before March 2 or after March 31.
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 3.5 months, from May 6 to August 23, with an average daily incident shortwave energy per square meter above 7.5 kWh. The brightest day of the year is June 18, with an average of 8.7 kWh.
The darker period of the year lasts for 3.3 months, from November 8 to February 17, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is December 22, with an average of 3.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Mehtar Lām are 34.671 deg latitude, 70.209 deg longitude, and 2,572 ft elevation.
The topography within 2 miles of Mehtar Lām contains only modest variations in elevation, with a maximum elevation change of 440 feet and an average elevation above sea level of 2,521 feet. Within 10 miles contains only modest variations in elevation (6,539 feet). Within 50 miles also contains extreme variations in elevation (15,069 feet).
The area within 2 miles of Mehtar Lām is covered by cropland (57%), artificial surfaces (15%), and grassland (13%), within 10 miles by grassland (44%) and bare soil (35%), and within 50 miles by grassland (50%) and bare soil (17%).
This report illustrates the typical weather in Mehtar Lām, 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 is only a single weather station, Surobi, in our network suitable to be used as a proxy for the historical temperature and dew point records of Mehtar Lām.
At a distance of 46 kilometers from Mehtar Lām, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Mehtar Lām according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.