September weather forecast
Haifa, Israel

Sepember signals a minor shift in Haifa's weather towards the mellower autumn temperatures. The month observes cooling temperatures, from a high of 29.9°C (85.8°F) to a relatively lower 21.7°C (71.1°F). Rainfall remains negligible with a meager 1mm (0.04") making September almost as dry as the summer months of July and August. The sea temperature starts tapering off slightly to 28.1°C (82.6°F), yet remains hospitable for swimming. Even though the daily sunshine duration drops to 10 hours, a continuing high UV index of 9 necessitates adequate sun protection measures.

Temperature

September in Haifa is marked by an average high-temperature of a moderately hot 29.9°C (85.8°F), almost identical to the preceding month. During September, the temperature in Haifa tends to dip to an average of 21.7°C (71.1°F) at night.

Heat index

The heat index in September is calculated to be a very hot 36°C (96.8°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Haifa, Israel, the average relative humidity in September is 74%.

Rainfall

Months with rainfall are January through June, September through December. September is the first month it rains. Throughout September, in the average 0.8 rainfall days, it receives 1mm (0.04") of precipitation. In Haifa, during the entire year, the rain falls for 63.9 days and collects up to 542mm (21.34") of precipitation.

Sea temperature

In Haifa, the average seawater temperature in September is 28.1°C (82.6°F).
Note: Water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

In Haifa, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 06:14 and sunset at 19:04. On the last day of September, in Haifa, sunrise is at 06:33 and sunset at 18:26 IDT.

Sunshine

In September, the average sunshine is 10h.

UV index

In Haifa, Israel, the average daily maximum UV index in September is 9. A UV Index value of 8 to 10 symbolizes a very high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 9 in September translates into the following instructions:
Ensure safety measures are in place, as skin and eyes are vulnerable to quick damage. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Post an outdoor workout or swimming, a broad-spectrum SPF 30+ sunscreen should be applied generously and frequently. Beware! Reflecting off water and sand, UV rays are much stronger.