September weather forecast
San Jerónimo, Guatemala

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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.
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Frequently asked questions

What is the usual temperature for San Jerónimo in September?

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).

What is the average humidity in September in San Jerónimo?

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

How many days does it rain in September in San Jerónimo?

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

How many hours of daylight does San Jerónimo have in September?

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

When is the sunrise / sunset in September in San Jerónimo?

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.

How long on average sun shines in September in San Jerónimo?

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

How high is the UV index in September in San Jerónimo?

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.

Average temperature in September
San Jerónimo, Guatemala

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).

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Average pressure in September
San Jerónimo, Guatemala

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).

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Average wind speed in September
San Jerónimo, Guatemala

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).

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Average humidity in September
San Jerónimo, Guatemala

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%).

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Average rainfall in September
San Jerónimo, Guatemala

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).

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Average rainfall days in September
San Jerónimo, Guatemala

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).

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Average daylight in September /
Average sunshine in September
San Jerónimo, Guatemala

Average daylight in September / Average sunshine in September - San Jerónimo, Guatemala
  • Average daylight in September: 12h and 1min

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 2min

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).

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Average sunshine days in September
San Jerónimo, Guatemala

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).

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Average UV index in September
San Jerónimo, Guatemala

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).

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Average cloud cover in September
San Jerónimo, Guatemala

Average cloud cover in September - San Jerónimo, Guatemala
  • Average cloud cover in September: 62

The month with the most cloud cover is November (Cloud cover 72).
The month with the least cloud cover is April (Cloud cover 37).

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Average visibility in September
San Jerónimo, Guatemala

Average visibility in September - San Jerónimo, Guatemala
  • Average visibility in September: 6km

The month with the highest visibility is April (8km).
The months with the lowest visibility are January and November (5km).

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San Jerónimo, Guatemala

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