Average Weather in Haymā’ Oman
In Haymā’, the summers are long, sweltering, humid, arid, and partly cloudy and the winters are short, comfortable, dry, and mostly clear. Over the course of the year, the temperature typically varies from 56°F to 110°F and is rarely below 50°F or above 114°F.
Based on the beach/pool score, the best times of year to visit Haymā’ for hot-weather activities are from mid March to mid April and from early October to late November.
The hot season lasts for 4.3 months, from May 3 to September 14, with an average daily high temperature above 104°F. The hottest day of the year is July 2, with an average high of 110°F and low of 82°F.
The cool season lasts for 2.8 months, from November 29 to February 21, with an average daily high temperature below 86°F. The coldest day of the year is January 11, with an average low of 56°F and high of 80°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
In Haymā’, 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 Haymā’ begins around September 7 and lasts for 8.6 months, ending around May 25. On November 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 13% of the time.
The cloudier part of the year begins around May 25 and lasts for 3.4 months, ending around September 7. On July 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 58% of the time, and clear, mostly clear, or partly cloudy 42% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
Haymā’ 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 4%, with an average value of 1%.
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 4% on March 24.
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. Haymā’ experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Haymā’. The most rain falls during the 31 days centered around March 14, with an average total accumulation of 0.3 inches.
The least rain falls around September 9, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Haymā’ varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 56 minutes of daylight; the longest day is June 21, with 13 hours, 20 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:34 AM on June 5, and the latest sunrise is 1 hour, 18 minutes later at 6:52 AM on January 17. The earliest sunset is at 5:33 PM on November 25, and the latest sunset is 1 hour, 24 minutes later at 6:58 PM on July 4.
Daylight saving time (DST) is not observed in Haymā’ during 2021.
Sunrise & Sunset with Twilight
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
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.
Haymā’ experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.8 months, from March 17 to November 11, during which time the comfort level is muggy, oppressive, or miserable at least 11% of the time. The muggiest day of the year is August 4, with muggy conditions 44% of the time.
The least muggy day of the year is January 12, with muggy conditions 1% of the time.
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 Haymā’ experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 3.6 months, from May 28 to September 16, with average wind speeds of more than 9.7 miles per hour. The windiest day of the year is July 29, with an average hourly wind speed of 12.4 miles per hour.
The calmer time of year lasts for 8.4 months, from September 16 to May 28. The calmest day of the year is November 18, with an average hourly wind speed of 6.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Haymā’ varies throughout the year.
The wind is most often from the south for 8.4 months, from February 12 to October 23, with a peak percentage of 66% on August 5. The wind is most often from the east for 1.5 months, from October 23 to December 9, with a peak percentage of 48% on November 15. The wind is most often from the north for 2.1 months, from December 9 to February 12, with a peak percentage of 48% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Haymā’ 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 Haymā’ for general outdoor tourist activities is from early November to early March, with a peak score in the first week of December.
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 Haymā’ for hot-weather activities are from mid March to mid April and from early October to late November, with a peak score in the last week of October.
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 Haymā’ 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
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
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 2.7 months, from April 1 to June 22, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest day of the year is May 15, with an average of 7.8 kWh.
The darker period of the year lasts for 2.5 months, from November 14 to January 28, with an average daily incident shortwave energy per square meter below 5.6 kWh. The darkest day of the year is December 18, with an average of 5.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Haymā’ are 19.959 deg latitude, 56.276 deg longitude, and 443 ft elevation.
The topography within 2 miles of Haymā’ contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 431 feet. Within 10 miles also contains only modest variations in elevation (190 feet). Within 50 miles also contains only modest variations in elevation (384 feet).
The area within 2 miles of Haymā’ is covered by bare soil (100%), within 10 miles by bare soil (100%), and within 50 miles by bare soil (99%).
This report illustrates the typical weather in Haymā’, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Haymā’ is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.
The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Haymā’, according to the International Standard Atmosphere .
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.
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.