Climate and Average Weather Year Round in Ras al-Khaimah United Arab Emirates
In Ras al-Khaimah, the summers are long, sweltering, muggy, and arid; the winters are comfortable and dry; and it is mostly clear year round. Over the course of the year, the temperature typically varies from 55°F to 108°F and is rarely below 49°F or above 113°F.
Based on the beach/pool score, the best times of year to visit Ras al-Khaimah for hot-weather activities are from late March to early May and from mid October to late November.
Climate in Ras al-Khaimah
Average Temperature in Ras al-Khaimah
The hot season lasts for 4.6 months, from May 8 to September 28, with an average daily high temperature above 102°F. The hottest day of the year is July 25, with an average high of 108°F and low of 87°F.
The cool season lasts for 3.0 months, from December 5 to March 5, with an average daily high temperature below 83°F. The coldest day of the year is January 15, with an average low of 55°F and high of 76°F.
Average High and Low Temperature in Ras al-Khaimah
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 Ras al-Khaimah
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
In Ras al-Khaimah, 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 Ras al-Khaimah begins around September 2 and lasts for 6.2 months, ending around March 9. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 93% of the time, and overcast or mostly cloudy 7% of the time.
The cloudier part of the year begins around March 9 and lasts for 5.8 months, ending around September 2. On July 29, the cloudiest day of the year, the sky is overcast or mostly cloudy 45% of the time, and clear, mostly clear, or partly cloudy 55% of the time.
Cloud Cover Categories in Ras al-Khaimah
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
Ras al-Khaimah 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 9%, 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. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 9% on January 27.
Daily Chance of Precipitation in Ras al-Khaimah
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. Ras al-Khaimah experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 3.7 months, from December 10 to April 1, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 5, with an average total accumulation of 0.8 inches.
The rainless period of the year lasts for 8.3 months, from April 1 to December 10. The least rain falls around September 10, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall in Ras al-Khaimah
The length of the day in Ras al-Khaimah varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 32 minutes of daylight; the longest day is June 21, with 13 hours, 45 minutes of daylight.
Hours of Daylight and Twilight in Ras al-Khaimah
The earliest sunrise is at 5:24 AM on June 9, and the latest sunrise is 1 hour, 40 minutes later at 7:04 AM on January 13. The earliest sunset is at 5:24 PM on November 30, and the latest sunset is 1 hour, 47 minutes later at 7:11 PM on July 3.
Daylight saving time (DST) is not observed in Ras al-Khaimah during 2021.
Sunrise & Sunset with Twilight in Ras al-Khaimah
The figure below presents a compact representation of key lunar data for 2021. 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.
Moon Rise, Set & Phases in Ras al-Khaimah
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.
Ras al-Khaimah experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.6 months, from April 30 to November 19, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is August 20, with muggy conditions 87% of the time.
The least muggy day of the year is January 16, with muggy conditions 2% of the time.
Humidity Comfort Levels in Ras al-Khaimah
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 Ras al-Khaimah experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.6 months, from December 10 to May 31, with average wind speeds of more than 7.2 miles per hour. The windiest day of the year is February 18, with an average hourly wind speed of 8.7 miles per hour.
The calmer time of year lasts for 6.4 months, from May 31 to December 10. The calmest day of the year is October 11, with an average hourly wind speed of 5.7 miles per hour.
Average Wind Speed in Ras al-Khaimah
The predominant average hourly wind direction in Ras al-Khaimah varies throughout the year.
The wind is most often from the east for 1.7 months, from July 19 to September 9, with a peak percentage of 45% on August 18. The wind is most often from the west for 10 months, from September 9 to July 19, with a peak percentage of 56% on January 1.
Wind Direction in Ras al-Khaimah
Ras al-Khaimah 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 some seasonal variation over the course of the year.
The time of year with warmer water lasts for 4.1 months, from June 8 to October 13, with an average temperature above 87°F. The day of the year with the warmest water is July 31, with an average temperature of 91°F.
The time of year with cooler water lasts for 3.4 months, from December 25 to April 8, with an average temperature below 76°F. The day of the year with the coolest water is February 19, with an average temperature of 72°F.
Average Water Temperature in Ras al-Khaimah
Best Time of Year to Visit
To characterize how pleasant the weather is in Ras al-Khaimah 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 Ras al-Khaimah for general outdoor tourist activities is from mid November to late March, with a peak score in the second week of February.
Tourism Score in Ras al-Khaimah
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 Ras al-Khaimah for hot-weather activities are from late March to early May and from mid October to late November, with a peak score in the first week of November.
Beach/Pool Score in Ras al-Khaimah
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 Ras al-Khaimah 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.
Time Spent in Various Temperature Bands and the Growing Season in Ras al-Khaimah
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.
Growing Degree Days in Ras al-Khaimah
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 2.5 months, from April 25 to July 11, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 1, with an average of 7.9 kWh.
The darker period of the year lasts for 2.8 months, from November 11 to February 5, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest day of the year is December 20, with an average of 4.0 kWh.
Average Daily Incident Shortwave Solar Energy in Ras al-Khaimah
For the purposes of this report, the geographical coordinates of Ras al-Khaimah are 25.790 deg latitude, 55.943 deg longitude, and 7 ft elevation.
The topography within 2 miles of Ras al-Khaimah contains only modest variations in elevation, with a maximum elevation change of 223 feet and an average elevation above sea level of 2 foot. Within 10 miles contains only modest variations in elevation (2,621 feet). Within 50 miles contains large variations in elevation (6,877 feet).
The area within 2 miles of Ras al-Khaimah is covered by water (49%) and bare soil (41%), within 10 miles by water (47%) and bare soil (45%), and within 50 miles by water (62%) and bare soil (36%).
This report illustrates the typical weather in Ras al-Khaimah, 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 Ras al-Khaimah.
For each station, the records are corrected for the elevation difference between that station and Ras al-Khaimah 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 Ras al-Khaimah is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ras al-Khaimah and a given station.
The stations contributing to this reconstruction are: Ras Al Khaimah International Airport (OMRK, 98%, 1.6 kilometers, northwest); Sharjah International Airport (OMSJ, 0.9%, 67 kilometers, southwest); and Fujairah International Airport (OMFJ, 0.6%, 85 kilometers, southeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.