September weather forecast
Jalapa, Guatemala

September

Weather in September

September maintains the tropical climate patterns, with high humidity and rainfall. The increase in rainfall to 269 millimeters compared to August indicates the apex of the second wave of the wet season. Even though comparisons with August indicate September's weather to be similar, rainfall spikes during this month. The weather heralds the peak of the second wet cycle, with constant showers and high humidity. Thus, September can be considered the encore of the tropical period in Jalapa, characterized by substantial rainfall.

Temperature

The onset of September in Jalapa brings with it an average high-temperature of a still warm 23.4°C (74.1°F), showing a negligible variation from the month before. During September, Jalapa experiences an average low-temperature of 15°C (59°F) at night.

Humidity

The most humid month is September, with an average relative humidity of 90%.

Rainfall

In Jalapa, in September, it is raining for 28.7 days, with typically 269mm (10.59") of accumulated precipitation. In Jalapa, during the entire year, the rain falls for 231.3 days and collects up to 1656mm (65.2") of precipitation.

Daylight

In September, the average length of the day is 12h and 13min.
On the first day of September, sunrise is at 05:47 and sunset at 18:11. On the last day of the month, sunrise is at 05:49 and sunset at 17:49 CST.

Sunshine

In Jalapa, the average sunshine in September is 7.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: During September, 5 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Suggestions to elude sunburn are provided. To guard against the harmful effects of the Sun, minimize exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Frequently asked questions

What is the average September temperature?
The high-temperature, in September, in Jalapa, is 23.4°C (74.1°F), while the low-temperature averages to 15°C (59°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in April is computed to be 29°C (84.2°F).
What is the most humid month?
September is the most humid month, with an average relative humidity of 90%.
What is the average humidity in September?
In September, the average relative humidity is 90%.
How many days does it rain in September?
In Jalapa, Guatemala, in September, during 28.7 rainfall days, 269mm (10.59") of precipitation is typically accumulated.
What is the average length of the day in September?
The average day length in September is 12h and 13min.
When are sunrise and sunset in September?
In September, on the first day of the month, sunrise is at 05:47 and sunset at 18:11. On the last day of the month, sunrise is at 05:49 and sunset at 17:49 CST.
How many hours of sunshine does Jalapa have in September?
In Jalapa, the average sunshine duration in September is 7.7h.
How high is the UV index in September?
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Jalapa, 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
Jalapa, 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
Jalapa, 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
Jalapa, 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
Jalapa, 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
Jalapa, 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
Jalapa, 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 4min

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
Jalapa, 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
Jalapa, 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
Jalapa, 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).

Average visibility in September
Jalapa, Guatemala
  • Average visibility in September: 6km

The month with the highest visibility is March (10km).
The month with the lowest visibility is September (6km).

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