September weather forecastSan Mateo, Philippines

Weather in September

The first month of the autumn, September, is still a warm month in San Mateo, Philippines, with an average temperature ranging between min 24.1°C (75.4°F) and max 29.9°C (85.8°F).

Temperature

The introduction of September notes a subtle temperature variation to a still moderately hot 29.9°C (85.8°F) from August's 29.8°C (85.6°F). In San Mateo, an average temperature of 24.1°C (75.4°F) is noted during September nights.

Heat index

In September, the heat index is appraised at a fiery hot 38°C (100.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. 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. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The months with the highest humidity in San Mateo are July through September, with an average relative humidity of 83%.

Rainfall

In San Mateo, Philippines, during September, the rain falls for 25.4 days and regularly aggregates up to 187mm (7.36") of precipitation. In San Mateo, during the entire year, the rain falls for 250.5 days and collects up to 1347mm (53.03") of precipitation.

Daylight

In San Mateo, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 5:43 am and sunset at 6:07 pm. On the last day of September, in San Mateo, sunrise is at 5:44 am and sunset at 5:45 pm PST.

Sunshine

The average sunshine in September in San Mateo is 8.3h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.