Climate and Average Weather Year Round in Milāḩ Yemen

In Milāḩ, the summers are short, warm, arid, and overcast and the winters are cool, dry, and mostly clear. Over the course of the year, the temperature typically varies from 42°F to 84°F and is rarely below 36°F or above 86°F.

Based on the tourism score, the best times of year to visit Milāḩ for warm-weather activities are from mid February to mid May and from mid August to early November.

The warm season lasts for 2.5 months, from May 17 to August 3, with an average daily high temperature above 81°F. The hottest month of the year in Milāḩ is June, with an average high of 83°F and low of 58°F.

The cool season lasts for 3.3 months, from October 27 to February 7, with an average daily high temperature below 74°F. The coldest month of the year in Milāḩ is December, with an average low of 43°F and high of 71°F.

In Milāḩ, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Milāḩ begins around September 14 and lasts for 7.4 months, ending around April 27.

The clearest month of the year in Milāḩ is November, during which on average the sky is clear, mostly clear, or partly cloudy 79% of the time.

The cloudier part of the year begins around April 27 and lasts for 4.6 months, ending around September 14.

The cloudiest month of the year in Milāḩ is July, during which on average the sky is overcast or mostly cloudy 68% of the time.

Milāḩ does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 1% to 5%, with an average value of 3%.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Milāḩ is August, with an average of 1.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 5% on August 10.

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. Milāḩ experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Milāḩ. The month with the most rain in Milāḩ is August, with an average rainfall of 0.3 inches.

The month with the least rain in Milāḩ is November, with an average rainfall of 0.1 inches.

The length of the day in Milāḩ varies over the course of the year. In 2024, the shortest day is December 21, with 11 hours, 17 minutes of daylight; the longest day is June 20, with 12 hours, 59 minutes of daylight.

The earliest sunrise is at 5:31 AM on June 1, and the latest sunrise is 59 minutes later at 6:29 AM on January 23. The earliest sunset is at 5:28 PM on November 21, and the latest sunset is 1 hour, 5 minutes later at 6:34 PM on July 9.

Daylight saving time (DST) is not observed in Milāḩ during 2024.

The figure below presents a compact representation of key lunar data for 2024. 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.

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 Milāḩ, 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.

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

The windier part of the year lasts for 2.6 months, from August 25 to November 12, with average wind speeds of more than 5.9 miles per hour. The windiest month of the year in Milāḩ is October, with an average hourly wind speed of 6.7 miles per hour.

The calmer time of year lasts for 9.4 months, from November 12 to August 25. The calmest month of the year in Milāḩ is January, with an average hourly wind speed of 5.0 miles per hour.

The predominant average hourly wind direction in Milāḩ varies throughout the year.

The wind is most often from the south for 1.9 months, from February 22 to April 18, with a peak percentage of 44% on March 28. The wind is most often from the east for 1.5 months, from April 18 to June 4 and for 5.2 months, from September 16 to February 22, with a peak percentage of 50% on May 17. The wind is most often from the north for 3.4 months, from June 4 to September 16, with a peak percentage of 52% on July 7.

To characterize how pleasant the weather is in Milāḩ 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 Milāḩ for general outdoor tourist activities are from mid February to mid May and from mid August to early November, with a peak score in the first week of October.

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 Milāḩ for hot-weather activities is from mid May to late September, with a peak score in the second week of June.

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.

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).

Temperatures in Milāḩ are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

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.

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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from February 27 to June 14, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Milāḩ is May, with an average of 7.3 kWh.

The darker period of the year lasts for 1.2 months, from July 11 to August 17, with an average daily incident shortwave energy per square meter below 6.4 kWh. The darkest month of the year in Milāḩ is December, with an average of 6.2 kWh.

For the purposes of this report, the geographical coordinates of Milāḩ are 14.416 deg latitude, 44.786 deg longitude, and 7,142 ft elevation.

The topography within 2 miles of Milāḩ contains only modest variations in elevation, with a maximum elevation change of 410 feet and an average elevation above sea level of 7,155 feet. Within 10 miles contains only modest variations in elevation (2,680 feet). Within 50 miles contains large variations in elevation (8,255 feet).

The area within 2 miles of Milāḩ is covered by cropland (33%), grassland (30%), bare soil (22%), and sparse vegetation (15%), within 10 miles by bare soil (49%) and sparse vegetation (30%), and within 50 miles by bare soil (71%) and sparse vegetation (15%).