Climate and monthly weather forecast
Siwa Oasis, Egypt

In the heart of Egypt's Western Desert, Siwa Oasis boasts a Subtropical desert climate, as denoted by the Köppen climate classification BWh. This locale experiences high temperatures and minimal rainfall, hallmarks of its predominant desert climate. The annual distribution of weather elements exhibits a unique pattern, set by the rhythmic interplay of heat, humidity, daylight, and rare precipitation.

Throughout the year, the oasis navigation sees temperatures sway between a sultry 37.5°C (99.5°F) during peak summer to a more moderate 5.6°C (42.1°F) in the winter. The relative humidity ranges from 33% in June to 59% in December, highlighting the dryness of the summer months and the slightly wetter winter season. Siwa Oasis experiences minimal rainfall throughout the year, with the highest recorded monthly average being a mere 2mm (0.08"). The daylight hours display a gradual increase from 10.5 hours in January to a peak of 14 hours in June, before steadily decreasing towards the year-end. Correspondingly, sunshine hours vary from a high of 11.7 hours in August to a low of 7.4 hours in January.

In this arid landscape, a few distinct characteristics merit attention. The scorching summer months from May to August have virtually no rainfall, reaffirming the desert climate. The winter months, although relativity dryer, have a smidgen above average rainfall with 2mm (0.08") recorded in January and December. This cyclical rhythm of weather conditions is instrumental in shaping the unique desert ecosystem of Siwa Oasis.

While the best time to visit Siwa Oasis is subjective and depends on individual preference, certain months provide a more agreeable climate for most visitors. Typically, the months spanning from October to April offer the most comfortable conditions for experiencing the oasis. During this period, the maximum temperatures oscillate from a mild 20.5°C (68.9°F) to a warm 30.5°C (86.9°F) along with low humidity levels around 44% to 56%. This relatively moderate phase, coupled with ample sunshine hours ranging from 8.2 to 10.5 per day, presents a favorable opportunity to experience Siwa's rich history, distinct architecture, and picturesque landscapes. Those planning a visit during this period will enjoy comfortable weather conditions receptive to outdoor activities and sightseeing.

Generally, the unforgiving summer months from May to September yield the harshest climate to unfurl the mesmerizing charm of Siwa Oasis. During this period, the oasis battles intense heat, with temperatures often scaling to an extreme high of 37.5°C (99.5°F). Alongside, the relative humidity drops to as low as 33%, further accentuating the heat and aridity. Combined with zero rainfall and extensive daylight hours from 13.6 to 14, these arduous conditions can make outdoor activities strenuous and less enjoyable. It is recommended that prospective tourists avoid planning their visit during this sweltering climate.

The onset of spring witnesses Siwa Oasis enveloped in a moderately warm and comparatively more comfortable climate. In this phase, extending from March to May, daily temperatures often hover between a pleasing 10.1°C (50.2°F) to a slightly hot 34°C (93.2°F). Although spring does provide minor respite from the cooler winter months, the late spring period begins to usher in the approaching summer's heat. The relative humidity begins to fall from 46% in March to a low of 34% in May, and rainfall registers only 1mm (0.04") in March and April and zero in May. This period also registers increased daylight and sunshine hours, building up to the extended sunlit summer days.

Riding on the prevailing BWh Subtropical desert climate, Siwa Oasis encounters scorching summer months from June to August. The soaring maximum temperature, ranging from 34.6°C (94.3°F) to a searing 37.5°C (99.5°F), underscores the aridity of this period. The region is mostly dry with zero rainfall and low relative humidity oscillating between 33% and 37%. With plush daylight and sunshine hours, stretching from 13.8 to 14 and 11.4 to 11.7 respectively, the relentless sun dominates, making this desert kingdom come alive in all its resplendent glory.

Autumn in Siwa Oasis, running from September to November, marks a gradual but notable transition from the extreme heat to the relatively cooler phase of the year. During this period, the thermostat retreats from a high of 34.6°C (94.3°F) in September to a much milder 25°C (77°F) in November. Corresponding to this, the relative humidity commences its upward journey from 44% to 56%, creating a marginally more moist ambiance. The lack of rainfall, however, remains constant, with no recorded precipitation. As daylight hours curtail from 12.3 to 10.7 and sunshine hours trim from 10.5 to 8.9, the sun's grip on the oasis begins to loosen, ushering in the cooler winter months.

Winter arrives in Siwa from December to February, revealing a stark contrast to the searing summer months. During this time, daily temperatures range from a low of 5.6°C (42.1°F) to a moderate high of 21.5°C (70.7°F). This period also registers a slight uptick in relative humidity levels from 56% to 59%, reflecting an increase in moisture. The minimal average rainfall of 1mm (0.04") to 2mm (0.08"), although inconsequential, represents the highest precipitation levels of the year. Daylight hours shrink to a low of 10.3 hours in December, and sunshine hours drop to 7.4 in January, marking the short, crisp winter days characteristic of Siwa's desert clime.

January is the opening act of the year in Siwa Oasis, Egypt. The winter season is in full swing as the region experiences relatively cool temperatures, a respite from the intense heat of the summer months. Notably, temperatures range from 5.6°C (42.1°F) to 19.3°C (66.7°F), giving locals and tourists alike a pleasant weather condition for various outdoor activities. Weather in January »

As Siwa Oasis transitions from January to February, subtle changes in the climate parameters can be noticed. The slightly warmer temperatures make outdoor exploration more appealing. Humidity drops from January's level, meaning this period of the year tends to feel less moist, enhancing comfort in the oasis. Weather in February »

With the arrival of March, Siwa Oasis begins to shake off the remaining chill, making way for warmer weather. This shift in temperature, coupled with decreasing humidity, promotes a drier and more comfortable climate. Despite the heat, the weather remains nice for outdoor pursuits. Weather in March »

April in Siwa Oasis welcomes a significant rise in temperature, signifying the onset of warmer days as the region heads towards the summer season. This rise in temperature from 24.5°C (76.1°F) to 29.9°C (85.8°F) reaffirms April as the gateway to the sweltering heat. Weather in April »

May signals the full onset of the sizzling summer season in Siwa Oasis. The temperatures rise further, making it one of the hottest months of the year. Despite the intense heat, very little humidity provides some level of comfort. Rainfall is practically non-existent during this time of the year, contributing to the intensely dry conditions. Weather in May »

June is no stranger to the sweltering heat as it grapples with soaring temperatures in Siwa Oasis. The temperature and humidity levels continue to follow the summer pattern, maintaining a dry and hot atmosphere. Although the sun blazes more fiercely than ever, it doesn't generally interrupt the day-to-day life in the oasis. Weather in June »

July in Siwa Oasis spells peak summer weather with sweltering temperatures hitting their annual maximum, noted to rise up to 37.5°C (99.5°F). The unusually high temperatures coupled with the ever-so-slight increase in humidity make for a hot and mildly stuffy condition. Weather in July »

August finds Siwa Oasis still in the firm grip of the summer season. The weather remains predominantly hot, but there is a minor drop in temperature compared to those of July. A marginally higher level of humidity can make the climate mildly sticky but still very much bearable. Weather in August »

September ushers in a gentle relief from summer heat in Siwa Oasis as the temperature takes a slight dip. However, relative humidity inches upwards, somewhat offsetting the comfort brought about by the cooler temperatures. Yet, the conduct of outdoor activities continues unabated. Weather in September »

The transition into October brings a more comfortable climate in Siwa Oasis. With the summers slowly receding, the oasis is bestowed with a mild and agreeable weather pattern. The daytime temperatures, though still warm, are not as blistering as those of the past months. Weather in October »

November marks the return of cooler climate in Siwa Oasis with temperatures falling steadily. The subtler warmth coupled with the increase in humidity creates a cozy atmosphere. Far from the heart of the summer season, the oasis basks in a more moderate, pleasant weather condition. Weather in November »

December closes the annual weather cycle in Siwa Oasis with the return of winter, the most gentle of seasons in this region. The air turns crisp as temperatures drop down to 6.5°C (43.7°F), providing a stark contrast to the oppressive summer heat. Weather in December »