September weather forecast
Acul, Guatemala

September

Weather in September

September, the first month of the autumn in Acul, is also an enjoyable month, with an average temperature ranging between max 16.7°C (62.1°F) and min 9.8°C (49.6°F).

Temperature

Acul experiences its lowest temperatures in September, with an average peak of 16.7°C (62.1°F) and a low of 9.8°C (49.6°F).

Humidity

September is the most humid month, with an average relative humidity of 93%.

Rainfall

In Acul, in September, it is raining for 29.9 days, with typically 471mm (18.54") of accumulated precipitation. Throughout the year, there are 295.3 rainfall days, and 2656mm (104.57") of precipitation is accumulated.

Daylight

In Acul, the average length of the day in September is 12h and 13min.
On the first day of September in Acul, Guatemala, sunrise is at 05:52 and sunset at 18:16. On the last day of the month, sunrise is at 05:54 and sunset at 17:54 CST.

Sunshine

The months with the least sunshine are June and September, with an average of 5.4h of sunshine.

UV index

January, June, August, September and November, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 in September interprets into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.

Frequently asked questions

What is the coldest month?
With average high temperatures of 16.7°C (62.1°F) and lows of 9.8°C (49.6°F), September is the coldest month.
What is the average September temperature?
The average high-temperature, in September, in Acul, is 16.7°C (62.1°F), while the average low-temperature is 9.8°C (49.6°F).
What is the most humid month in Acul?
With an average relative humidity of 93%, September is the most humid month.
What is the average humidity in September?
The average relative humidity in September is 93%.
How many days does it rain in September?
In Acul, in September, it is raining for 29.9 days, with typically 471mm (18.54") of accumulated precipitation.
What is the average length of the day in September?
In September, the average day length is 12h and 13min.
What time are sunrise and sunset in September?
On the first day of September, sunrise is at 05:52 and sunset at 18:16. On the last day of the month, sunrise is at 05:54 and sunset at 17:54 CST.
What are the months with the least sunshine?
The months with the least sunshine are June and September, with an average of 5.4h of sunshine.
How long on average sun shines in September in Acul?
In Acul, the average sunshine duration in September is 5.4h.
When is the lowest UV index?
January, June, August, September and November, with an average maximum UV index of 3, are months with the lowest UV index.
How high is the UV index in September?
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health risk from 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
Acul, Guatemala
  • Average high temperature in September: 16.7°C

The warmest month (with the highest average high temperature) is April (21°C).
The month with the lowest average high temperature is September (16.7°C).

  • Average low temperature in September: 9.8°C

The month with the highest average low temperature is June (10.4°C).
The coldest month (with the lowest average low temperature) is January (6°C).

Average pressure in September
Acul, Guatemala
  • Average pressure in September: 1013.1mbar

The month with the highest atmospheric pressure is January (1016.3mbar).
The month with the lowest atmospheric pressure is May (1013mbar).

Average wind speed in September
Acul, Guatemala
  • Average wind speed in September: 4.6km/h

The windiest month (with the highest average wind speed) is July (6.5km/h).
The calmest month (with the lowest average wind speed) is May (4.4km/h).

Average humidity in September
Acul, Guatemala
  • Average humidity in September: 93%

The month with the highest relative humidity is September (93%).
The months with the lowest relative humidity are March and April (77%).

Average rainfall in September
Acul, Guatemala
  • Average rainfall in September: 471mm

The wettest month (with the highest rainfall) is June (521mm).
The driest month (with the least rainfall) is February (24mm).

Average rainfall days in September
Acul, Guatemala
  • Average rainfall days in September: 29.9 days

The month with the highest number of rainy days is August (30 days).
The month with the least rainy days is February (16 days).

Average daylight in September /
Average sunshine in September
Acul, 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 12min).

  • Average sunshine in September: 5h and 2min

The month with the most sunshine is April (Average sunshine: 9h and 48min).
The months with the least sunshine are June and September (Average sunshine: 5h and 24min).

Average sunshine days in September
Acul, Guatemala
  • Average sunshine days in September: 0.1 days

The month with the most sunshine days is December (9.5 days).
The month with the least sunshine days is September (0.1 days).

Average UV index in September
Acul, Guatemala
  • Average UV index in September: 3

The months with the highest UV index are February, March, April, May, July, October and December (UV index 4).
The months with the lowest UV index are January, June, August, September and November (UV index 3).

Average cloud cover in September
Acul, Guatemala
  • Average cloud cover in September: 75

The months with the most cloud cover are June and September (Cloud cover 75).
The month with the least cloud cover is March (Cloud cover 41).

Average visibility in September
Acul, Guatemala
  • Average visibility in September: 5km

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

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