September weather forecastTelemán, Guatemala

September

Weather in September

The first month of the autumn, September, is still a warm month in Telemán, Guatemala, with temperature in the range of an average low of 18.7°C (65.7°F) and an average high of 29.5°C (85.1°F).

Temperature

Telemán records an average high-temperature of a still warm 29.5°C (85.1°F) in September, maintaining a close correlation with August's 29.7°C (85.5°F). September generally records an average low-temperature of 18.7°C (65.7°F).

Heat index

September's mean heat index is appraised at a very hot 37°C (98.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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 natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In Telemán, the average relative humidity in September is 83%.

Rainfall

In Telemán, during September, the rain falls for 23.2 days and regularly aggregates up to 98mm (3.86") of precipitation. Throughout the year, there are 193.9 rainfall days, and 636mm (25.04") of precipitation is accumulated.

Daylight

In Telemán, the average length of the day in September is 12h and 13min.
On the first day of September, sunrise is at 05:46 and sunset at 18:10. On the last day of the month, sunrise is at 05:48 and sunset at 17:48 CST.

Sunshine

The average sunshine in September is 8.3h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 6 suggests this advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.

Updated: Jun 13, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Telemán, in September, the average high-temperature is 29.5°C (85.1°F), and the average low-temperature is 18.7°C (65.7°F). The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 37°C (98.6°F).

In September, the average relative humidity in Telemán is 83%.

In Telemán, in September, it is raining for 23.2 days, with typically 98mm (3.86") of accumulated precipitation.

The average day length in September is 12h and 13min.

In September, on the first day of the month, sunrise is at 05:46 and sunset at 18:10. On the last day of the month, sunrise is at 05:48 and sunset at 17:48 CST.

In September, the average sunshine duration is 8.3h.

In September, the average daily maximum UV index in Telemán is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

29.7°C

29.5°C

28°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.1km/h

5.5km/h

6.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

7.1

4.3

7.9

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Telemán, Guatemala

Average high temperature in September: 29.5°C

The warmest month (with the highest average high temperature) is April (32.3°C).
The month with the lowest average high temperature is January (25.1°C).

Average low temperature in September: 18.7°C

The month with the highest average low temperature is May (20.2°C).
The coldest month (with the lowest average low temperature) is January (15.7°C).

Average pressure in September
Telemán, Guatemala

Average pressure in September: 1012.5mbar

The month with the highest atmospheric pressure is January (1016.3mbar).
The month with the lowest atmospheric pressure is September (1012.5mbar).

Average wind speed in September
Telemán, Guatemala

Average wind speed in September: 5.1km/h

The windiest month (with the highest average wind speed) is January (7.6km/h).
The calmest month (with the lowest average wind speed) is September (5.1km/h).

Average humidity in September
Telemán, Guatemala

Average humidity in September: 83%

The months with the highest relative humidity are October and November (84%).
The month with the lowest relative humidity is April (67%).

Average rainfall in September
Telemán, Guatemala

Average rainfall in September: 98mm

The wettest month (with the highest rainfall) is June (111mm).
The driest month (with the least rainfall) is March (8mm).

Average rainfall days in September
Telemán, Guatemala

Average rainfall days in September: 23.2 days

The month with the highest number of rainy days is June (23.8 days).
The month with the least rainy days is December (9.3 days).

Average daylight in September /
Average sunshine in September
Telemán, Guatemala

Average daylight in September: 12h and 12min

The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).

Average sunshine in September: 8h and 18min

The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).