Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's commencement is accompanied by an average high-temperature of a pleasant 22.9°C (73.2°F), diverging marginally from August's 23°C (73.4°F). Santa Teresa in September experiences a low-temperature average of 16.5°C (61.7°F).Humidity
In Santa Teresa, Costa Rica, the average relative humidity in September is 89%.Rainfall
In Santa Teresa, in September, it is raining for 29.7 days, with typically 320mm (12.6") of accumulated precipitation. Throughout the year, in Santa Teresa, there are 305 rainfall days, and 2534mm (99.76") of precipitation is accumulated.Daylight
In Santa Teresa, the average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 05:25 and sunset at 17:43. On the last day of September, in Santa Teresa, sunrise is at 05:23 and sunset at 17:26 CST.
Sunshine
The average sunshine in September in Santa Teresa, Costa Rica, 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 are January through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Santa Teresa in September?
What is the average humidity in September in Santa Teresa?
How many days does it rain in September in Santa Teresa?
What is the average length of the day in September in Santa Teresa?
When are sunrise and sunset in September in Santa Teresa?
How long on average sun shines in September in Santa Teresa?
What are the months with the highest UV index in Santa Teresa?
When is the lowest UV index in Santa Teresa?
How high is the UV index in September in Santa Teresa?
Average temperature in September
Santa Teresa, 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
Santa Teresa, 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
Santa Teresa, 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
Santa Teresa, 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
Santa Teresa, 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
Santa Teresa, 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
Santa Teresa, 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 36min).
- Average sunshine in September: 7h and 2min
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
Santa Teresa, 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
Santa Teresa, 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).
Average cloud cover in September
Santa Teresa, Costa Rica
- Average cloud cover in September: 56
The month with the most cloud cover is October (Cloud cover 61).
The month with the least cloud cover is February (Cloud cover 31).
Average visibility in September
Santa Teresa, Costa Rica
- Average visibility in September: 6km
The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are September and October (6km).
Santa Teresa, Costa Rica
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