September weather forecastSumpango, Guatemala

September

Weather in September

The first month of the autumn, September, is still a warm month in Sumpango, Guatemala, with an average temperature varying between 15°C (59°F) and 23.4°C (74.1°F).

Temperature

The onset of September brings an average high-temperature of a still warm 23.4°C (74.1°F), nearly matching the August temperature. Sumpango's average low-temperature is measured at a refreshing 15°C (59°F) during September.

Humidity

With an average relative humidity of 90%, September is the most humid month.

Rainfall

In September, the rain falls for 28.7 days. Throughout September, 269mm (10.59") of precipitation is accumulated. Throughout the year, in Sumpango, there are 231.3 rainfall days, and 1656mm (65.2") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 13min.
On the first day of September, sunrise is at 05:50 and sunset at 18:14. On the last day of the month, sunrise is at 05:52 and sunset at 17:52 CST.

Sunshine

In September, the average sunshine is 7.7h.

UV index

In Sumpango, Guatemala, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.

Updated: Feb 15, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, in Sumpango, the average high-temperature is 23.4°C (74.1°F), and the average low-temperature is 15°C (59°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in April is computed to be 29°C (84.2°F).

With an average relative humidity of 90%, September is the most humid month in Sumpango, Guatemala.

In September, the average relative humidity in Sumpango is 90%.

In Sumpango, Guatemala, during September, the rain falls for 28.7 days and regularly aggregates up to 269mm (10.59") of precipitation.

In September, the average day length in Sumpango is 12h and 13min.

In September, on the first day of the month, sunrise is at 05:50 and sunset at 18:14. On the last day of the month, in Sumpango, sunrise is at 05:52 and sunset at 17:52 CST.

The average sunshine duration in September in Sumpango is 7.7h.

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health threat 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

24.2°C

23.4°C

22.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7km/h

6.1km/h

9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

2.2

0.9

3.7

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Sumpango, Guatemala

Average high temperature in September: 23.4°C

The warmest month (with the highest average high temperature) is April (27.3°C).
The month with the lowest average high temperature is October (22.5°C).

Average low temperature in September: 15°C

The month with the highest average low temperature is May (16.5°C).
The coldest month (with the lowest average low temperature) is January (11.8°C).

Average pressure in September
Sumpango, Guatemala

Average pressure in September: 1012.6mbar

The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is May (1012.5mbar).

Average wind speed in September
Sumpango, Guatemala

Average wind speed in September: 5.9km/h

The windiest month (with the highest average wind speed) is January (12.8km/h).
The calmest month (with the lowest average wind speed) is September (5.9km/h).

Average humidity in September
Sumpango, Guatemala

Average humidity in September: 90%

The month with the highest relative humidity is September (90%).
The month with the lowest relative humidity is March (69%).

Average rainfall in September
Sumpango, Guatemala

Average rainfall in September: 269mm

The wettest month (with the highest rainfall) is May (285mm).
The driest month (with the least rainfall) is January (7mm).

Average rainfall days in September
Sumpango, Guatemala

Average rainfall days in September: 28.7 days

The month with the highest number of rainy days is September (28.7 days).
The month with the least rainy days is January (6.7 days).

Average daylight in September /
Average sunshine in September
Sumpango, 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 18min).

Average sunshine in September: 7h and 42min

The month with the most sunshine is April (Average sunshine: 11h and 18min).
The month with the least sunshine is October (Average sunshine: 7h and 24min).

Average sunshine days in September
Sumpango, Guatemala

Average sunshine days in September: 0.9 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is September (0.9 days).

Average UV index in September
Sumpango, Guatemala

Average UV index in September: 5

The months with the highest UV index are March and April (UV index 6).
The months with the lowest UV index are August and October (UV index 4).

Average cloud cover in September
Sumpango, Guatemala

Average cloud cover in September: 59

The months with the most cloud cover are June and September (Cloud cover 59).
The months with the least cloud cover are January, February and March (Cloud cover 26).