Climate and Average Weather Year Round in Umm Şalāl ‘Alī Qatar

In Umm Şalāl ‘Alī, the summers are long, sweltering, muggy, arid, and partly cloudy and the winters are comfortable, dry, windy, and mostly clear. Over the course of the year, the temperature typically varies from 56°F to 109°F and is rarely below 50°F or above 114°F.

Based on the beach/pool score, the best times of year to visit Umm Şalāl ‘Alī for hot-weather activities are from early April to early May and from mid October to late November.

The hot season lasts for 4.4 months, from May 9 to September 22, with an average daily high temperature above 101°F. The hottest month of the year in Umm Şalāl ‘Alī is July, with an average high of 108°F and low of 87°F.

The cool season lasts for 3.1 months, from December 2 to March 5, with an average daily high temperature below 79°F. The coldest month of the year in Umm Şalāl ‘Alī is January, with an average low of 56°F and high of 71°F.

In Umm Şalāl ‘Alī, 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 Umm Şalāl ‘Alī begins around September 6 and lasts for 6.2 months, ending around March 13.

The clearest month of the year in Umm Şalāl ‘Alī is October, during which on average the sky is clear, mostly clear, or partly cloudy 87% of the time.

The cloudier part of the year begins around March 13 and lasts for 5.8 months, ending around September 6.

The cloudiest month of the year in Umm Şalāl ‘Alī is August, during which on average the sky is overcast or mostly cloudy 45% of the time.

Umm Şalāl ‘Alī 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 0% to 6%, with an average value of 2%.

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 Umm Şalāl ‘Alī is March, with an average of 1.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 6% on March 14.

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. Umm Şalāl ‘Alī experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Umm Şalāl ‘Alī. The month with the most rain in Umm Şalāl ‘Alī is March, with an average rainfall of 0.4 inches.

The month with the least rain in Umm Şalāl ‘Alī is June, with an average rainfall of 0.0 inches.

The length of the day in Umm Şalāl ‘Alī varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 33 minutes of daylight; the longest day is June 20, with 13 hours, 44 minutes of daylight.

The earliest sunrise is at 4:43 AM on June 8, and the latest sunrise is 1 hour, 39 minutes later at 6:22 AM on January 14. The earliest sunset is at 4:43 PM on November 29, and the latest sunset is 1 hour, 46 minutes later at 6:29 PM on July 1.

Daylight saving time (DST) is not observed in Umm Şalāl ‘Alī 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.

Umm Şalāl ‘Alī experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.2 months, from May 15 to November 23, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The month with the most muggy days in Umm Şalāl ‘Alī is August, with 25.1 days that are muggy or worse.

The month with the fewest muggy days in Umm Şalāl ‘Alī is February, with 0.6 days that are muggy or worse.

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 Umm Şalāl ‘Alī experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 2.6 months, from April 29 to July 18, with average wind speeds of more than 9.3 miles per hour. The windiest month of the year in Umm Şalāl ‘Alī is February, with an average hourly wind speed of 10.9 miles per hour.

The calmer time of year lasts for 9.4 months, from July 18 to April 29. The calmest month of the year in Umm Şalāl ‘Alī is September, with an average hourly wind speed of 7.6 miles per hour.

The predominant average hourly wind direction in Umm Şalāl ‘Alī is from the north throughout the year.

Umm Şalāl ‘Alī is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 28 to October 11, with an average temperature above 88°F. The month of the year in Umm Şalāl ‘Alī with the warmest water is August, with an average temperature of 92°F.

The time of year with cooler water lasts for 3.4 months, from December 22 to April 4, with an average temperature below 72°F. The month of the year in Umm Şalāl ‘Alī with the coolest water is February, with an average temperature of 67°F.

To characterize how pleasant the weather is in Umm Şalāl ‘Alī 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 time of year to visit Umm Şalāl ‘Alī for general outdoor tourist activities is from mid November to early April, with a peak score in the last week of November.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Umm Şalāl ‘Alī for hot-weather activities are from early April to early May and from mid October to late November, with a peak score in the first week of November.

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 Umm Şalāl ‘Alī 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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.6 months, from May 4 to July 22, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest month of the year in Umm Şalāl ‘Alī is June, with an average of 8.0 kWh.

The darker period of the year lasts for 2.9 months, from November 9 to February 6, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest month of the year in Umm Şalāl ‘Alī is December, with an average of 4.0 kWh.

For the purposes of this report, the geographical coordinates of Umm Şalāl ‘Alī are 25.470 deg latitude, 51.397 deg longitude, and 52 ft elevation.

The topography within 2 miles of Umm Şalāl ‘Alī is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 56 feet. Within 10 miles is essentially flat (167 feet). Within 50 miles contains only modest variations in elevation (571 feet).

The area within 2 miles of Umm Şalāl ‘Alī is covered by bare soil (100%), within 10 miles by bare soil (80%) and water (11%), and within 50 miles by water (51%) and bare soil (47%).