September weather forecast
Trojas, Costa Rica

September

Weather in September

The first month of the autumn, September, is also a moderately hot month in Trojas, Costa Rica, with temperature in the range of an average low of 19.2°C (66.6°F) and an average high of 26.3°C (79.3°F).

Temperature

Trojas in September witnesses an average high-temperature of a still warm 26.3°C (79.3°F), indicating a slight variation from August's 26.7°C (80.1°F). Trojas, during the nights of September, experiences an average temperature drop to a refreshing 19.2°C (66.6°F).

Humidity

The average relative humidity in September in Trojas is 87%.

Rainfall

In Trojas, in September, during 29.4 rainfall days, 288mm (11.34") of precipitation is typically accumulated. Throughout the year, in Trojas, there are 272 rainfall days, and 2217mm (87.28") of precipitation is accumulated.

Daylight

In Trojas, the average length of the day in September is 12h and 11min.
On the first day of September in Trojas, sunrise is at 05:27 and sunset at 17:46. On the last day of the month, sunrise is at 05:25 and sunset at 17:28 CST.

Sunshine

In September, the average sunshine is 7.6h.

UV index

January through April, June, July, September, October and December, with an average maximum UV index of 6, are months with the highest UV index in Trojas. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

Frequently asked questions

What is the temperature in September in Trojas?
Trojas in September has an average high-temperature of 26.3°C (79.3°F) and an average low-temperature of 19.2°C (66.6°F). In May, the average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 32°C (89.6°F).
What is the average humidity in September in Trojas?
In September, the average relative humidity in Trojas, Costa Rica, is 87%.
How much does it rain in Trojas in September?
In Trojas, in September, it is raining for 29.4 days, with typically 288mm (11.34") of accumulated precipitation.
How many hours of daylight does Trojas have in September?
In Trojas, Costa Rica, the average day length in September is 12h and 11min.
When are sunrise and sunset in September in Trojas?
In September, on the first day of the month, sunrise is at 05:27 and sunset at 17:46. On the last day of the month, sunrise is at 05:25 and sunset at 17:28 CST.
How long on average sun shines in September in Trojas?
In Trojas, the average sunshine duration in September is 7.6h.
What are the months with the highest UV index in Trojas?
The months with the highest UV index in Trojas, Costa Rica, are January through April, June, July, September, October and December, with an average maximum UV index of 6.
What is the UV index intensity in September in Trojas?
In Trojas, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health 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
Trojas, Costa Rica
  • Average high temperature in September: 26.3°C

The warmest months (with the highest average high temperature) are March and April (29.7°C).
The month with the lowest average high temperature is October (25.4°C).

  • Average low temperature in September: 19.2°C

The month with the highest average low temperature is May (19.8°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

Average pressure in September
Trojas, Costa Rica
  • Average pressure in September: 1011mbar

The month with the highest atmospheric pressure is January (1012.1mbar).
The month with the lowest atmospheric pressure is October (1010.7mbar).

Average wind speed in September
Trojas, Costa Rica
  • Average wind speed in September: 3.8km/h

The windiest month (with the highest average wind speed) is February (10.6km/h).
The calmest month (with the lowest average wind speed) is September (3.8km/h).

Average humidity in September
Trojas, Costa Rica
  • Average humidity in September: 87%

The month with the highest relative humidity is October (89%).
The month with the lowest relative humidity is March (70%).

Average rainfall in September
Trojas, Costa Rica
  • Average rainfall in September: 288mm

The wettest month (with the highest rainfall) is October (396mm).
The driest month (with the least rainfall) is February (17mm).

Average rainfall days in September
Trojas, Costa Rica
  • Average rainfall days in September: 29.4 days

The month with the highest number of rainy days is October (30.2 days).
The month with the least rainy days is February (10.3 days).

Average daylight in September /
Average sunshine in September
Trojas, Costa Rica
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).

  • Average sunshine in September: 7h and 4min

The month with the most sunshine is March (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 0min).

Average sunshine days in September
Trojas, Costa Rica
  • Average sunshine days in September: 0.5 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is September (0.5 days).

Average UV index in September
Trojas, Costa Rica
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, June, July, September, October and December (UV index 6).
The months with the lowest UV index are May, August and November (UV index 5).

Average cloud cover in September
Trojas, Costa Rica
  • Average cloud cover in September: 50

The month with the most cloud cover is October (Cloud cover 54).
The month with the least cloud cover is February (Cloud cover 19).

Average visibility in September
Trojas, Costa Rica
  • Average visibility in September: 7km

The months with the highest visibility are February and March (10km).
The months with the lowest visibility are August, September, October and November (7km).

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