September weather forecastSan Jerónimo, Guatemala

September

Weather in September

The first month of the autumn, September, is also a moderately hot month in San Jerónimo, Guatemala, with an average temperature varying between 25.3°C (77.5°F) and 16.9°C (62.4°F).

Temperature

San Jerónimo's average high-temperature in September is a still moderately hot 25.3°C (77.5°F), indicating a subtle variation from August. The average low-temperature of 16.9°C (62.4°F) is witnessed in San Jerónimo during September.

Humidity

The average relative humidity in September in San Jerónimo is 90%.

Rainfall

In San Jerónimo, in September, during 29.4 rainfall days, 345mm (13.58") of precipitation is typically accumulated. In San Jerónimo, Guatemala, during the entire year, the rain falls for 297.8 days and collects up to 2530mm (99.61") of precipitation.

Daylight

In San Jerónimo, the average length of the day in September is 12h and 13min.
On the first day of September, sunrise is at 05:48 and sunset at 18:12. On the last day of the month, sunrise is at 05:50 and sunset at 17:50 CST.

Sunshine

In San Jerónimo, the average sunshine in September is 7.3h.

UV index

In San Jerónimo, Guatemala, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

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

Frequently asked questions

The average high-temperature and low-temperature in San Jerónimo, Guatemala, during September are 25.3°C (77.5°F) and 16.9°C (62.4°F) respectively. In April, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 31°C (87.8°F).

The average relative humidity in September in San Jerónimo, Guatemala, is 90%.

In San Jerónimo, Guatemala, in September, it is raining for 29.4 days, with typically 345mm (13.58") of accumulated precipitation.

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

In September, on the first day of the month, sunrise is at 05:48 and sunset at 18:12. On the last day of the month, sunrise is at 05:50 and sunset at 17:50 CST.

The average sunshine duration in September in San Jerónimo, Guatemala, is 7.3h.

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

25.8°C

25.3°C

23.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

4.8km/h

4.3km/h

5.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

2.5

0.6

2.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
San Jerónimo, Guatemala

Average high temperature in September: 25.3°C

The warmest month (with the highest average high temperature) is April (27.8°C).
The month with the lowest average high temperature is January (21.2°C).

Average low temperature in September: 16.9°C

The month with the highest average low temperature is June (17.6°C).
The coldest month (with the lowest average low temperature) is January (12.5°C).

Average pressure in September
San Jerónimo, Guatemala

Average pressure in September: 1013mbar

The month with the highest atmospheric pressure is January (1017.3mbar).
The months with the lowest atmospheric pressure are May and September (1013mbar).

Average wind speed in September
San Jerónimo, Guatemala

Average wind speed in September: 4.1km/h

The windiest months (with the highest average wind speed) are March and April (5.5km/h).
The calmest month (with the lowest average wind speed) is September (4.1km/h).

Average humidity in September
San Jerónimo, Guatemala

Average humidity in September: 90%

The month with the highest relative humidity is November (91%).
The month with the lowest relative humidity is April (76%).

Average rainfall in September
San Jerónimo, Guatemala

Average rainfall in September: 345mm

The wettest month (with the highest rainfall) is June (377mm).
The driest month (with the least rainfall) is February (71mm).

Average rainfall days in September
San Jerónimo, Guatemala

Average rainfall days in September: 29.4 days

The month with the highest number of rainy days is September (29.4 days).
The month with the least rainy days is March (19.4 days).

Average daylight in September /
Average sunshine in September
San Jerónimo, 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 18min

The month with the most sunshine is April (Average sunshine: 10h and 12min).
The months with the least sunshine are January and November (Average sunshine: 4h and 42min).

Average sunshine days in September
San Jerónimo, Guatemala

Average sunshine days in September: 0.6 days

The month with the most sunshine days is March (8.8 days).
The month with the least sunshine days is September (0.6 days).

Average UV index in September
San Jerónimo, 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 January, November and December (UV index 4).