September weather forecastCot, Costa Rica

September

Weather in September

The first month of the autumn, September, is also an agreeable month in Cot, Costa Rica, with an average temperature ranging between min 16.5°C (61.7°F) and max 22.9°C (73.2°F).

Temperature

The onset of September brings with it an average high-temperature of an agreeable 22.9°C (73.2°F), showing a negligible variation from the month before. The average low-temperature of 16.5°C (61.7°F) is witnessed in Cot during September.

Humidity

The average relative humidity in September is 89%.

Rainfall

In Cot, in September, it is raining for 29.7 days, with typically 320mm (12.6") of accumulated precipitation. Throughout the year, there are 305 rainfall days, and 2534mm (99.76") of precipitation is accumulated.

Daylight

The average length of the day in September in Cot is 12h and 11min.
On the first day of September in Cot, Costa Rica, sunrise is at 05:26 and sunset at 17:44. On the last day of the month, sunrise is at 05:24 and sunset at 17:26 CST.

Sunshine

In Cot, the average sunshine in September is 7.3h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 5. The months with the lowest UV index in Cot, Costa Rica, are January through December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 5 in September suggests the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in September, in Cot, records 22.9°C (73.2°F), while the low-temperature is 16.5°C (61.7°F).

In Cot, the average relative humidity in September is 89%.

In Cot, in September, during 29.7 rainfall days, 320mm (12.6") of precipitation is typically accumulated.

The average day length in September is 12h and 11min.

In September, on the first day of the month, sunrise is at 05:26 and sunset at 17:44. On the last day of the month, in Cot, Costa Rica, sunrise is at 05:24 and sunset at 17:26 CST.

In Cot, the average sunshine duration in September is 7.3h.

The months with the highest UV index are January through December, with an average maximum UV index of 5.

January through December, with an average maximum UV index of 5, are months with the lowest UV index.

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from 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

23°C

22.9°C

22.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5km/h

3.8km/h

4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

0.4

0.3

0.1

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Cot, Costa Rica

Average high temperature in September: 22.9°C

The warmest month (with the highest average high temperature) is April (25.3°C).
The month with the lowest average high temperature is October (22.2°C).

Average low temperature in September: 16.5°C

The month with the highest average low temperature is May (16.9°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).

Average pressure in September
Cot, Costa Rica

Average pressure in September: 1011.2mbar

The month with the highest atmospheric pressure is January (1012.4mbar).
The month with the lowest atmospheric pressure is October (1010.9mbar).

Average wind speed in September
Cot, Costa Rica

Average wind speed in September: 3.7km/h

The windiest month (with the highest average wind speed) is February (8.6km/h).
The calmest month (with the lowest average wind speed) is September (3.7km/h).

Average humidity in September
Cot, Costa Rica

Average humidity in September: 89%

The month with the highest relative humidity is October (90%).
The month with the lowest relative humidity is February (76%).

Average rainfall in September
Cot, Costa Rica

Average rainfall in September: 320mm

The wettest month (with the highest rainfall) is October (444mm).
The driest month (with the least rainfall) is February (33mm).

Average rainfall days in September
Cot, Costa Rica

Average rainfall days in September: 29.7 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (14.9 days).

Average daylight in September /
Average sunshine in September
Cot, Costa Rica

Average daylight in September: 12h and 12min

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 36min).

Average sunshine in September: 7h and 18min

The month with the most sunshine is February (Average sunshine: 9h and 6min).
The month with the least sunshine is October (Average sunshine: 6h and 30min).

Average sunshine days in September
Cot, Costa Rica

Average sunshine days in September: 0.3 days

The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is October (0.1 days).

Average UV index in September
Cot, Costa Rica

Average UV index in September: 5

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