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
September
Weather in September
Temperature
Río Segundo marks the start of September with an average high-temperature of a still moderately hot 24.3°C (75.7°F), hinting at a slight fluctuation from August's 24.9°C (76.8°F). In the month of September, Río Segundo records a consistent average low-temperature of 17.7°C (63.9°F).Humidity
In September, the average relative humidity in Río Segundo is 89%.Rainfall
In September, the rain falls for 29.5 days. Throughout September, 349mm (13.74") of precipitation is accumulated. Throughout the year, there are 289.2 rainfall days, and 2603mm (102.48") of precipitation is accumulated.Daylight
In Río Segundo, the average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 05:27 and sunset at 17:45. On the last day of September, sunrise is at 05:25 and sunset at 17:27 CST.
Sunshine
The average sunshine in September is 6.8h.UV index
The months with the lowest UV index are January, February, May through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Río Segundo?
What is the average humidity in September in Río Segundo?
How many days does it rain in September in Río Segundo?
What is the average length of the day in September in Río Segundo?
When is the sunrise / sunset in September in Río Segundo?
How many hours of sunshine does Río Segundo have in September?
What is the month with the lowest UV index in Río Segundo?
What is the UV index reading in September in Río Segundo?
Average temperature in September
Río Segundo, Costa Rica
- Average high temperature in September: 24.3°C
The warmest month (with the highest average high temperature) is April (28°C).
The month with the lowest average high temperature is October (23.7°C).
- Average low temperature in September: 17.7°C
The month with the highest average low temperature is May (18.5°C).
The coldest month (with the lowest average low temperature) is January (15.3°C).
Average pressure in September
Río Segundo, Costa Rica
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is January (1012.2mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).
Average wind speed in September
Río Segundo, Costa Rica
- Average wind speed in September: 3.9km/h
The windiest month (with the highest average wind speed) is February (10.9km/h).
The calmest month (with the lowest average wind speed) is September (3.9km/h).
Average humidity in September
Río Segundo, 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 March (71%).
Average rainfall in September
Río Segundo, Costa Rica
- Average rainfall in September: 349mm
The wettest month (with the highest rainfall) is October (429mm).
The driest month (with the least rainfall) is February (24mm).
Average rainfall days in September
Río Segundo, Costa Rica
- Average rainfall days in September: 29.5 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (11.8 days).
Average daylight in September /
Average sunshine in September
Río Segundo, 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: 6h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 6h and 6min).
Average sunshine days in September
Río Segundo, Costa Rica
- Average sunshine days in September: 0.4 days
The month with the most sunshine days is February (13.1 days).
The month with the least sunshine days is July (0.3 days).
Average UV index in September
Río Segundo, Costa Rica
- 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 January, February, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover in September
Río Segundo, Costa Rica
- Average cloud cover in September: 60
The month with the most cloud cover is October (Cloud cover 63).
The month with the least cloud cover is February (Cloud cover 23).
Average visibility in September
Río Segundo, Costa Rica
- Average visibility in September: 6km
The months with the highest visibility are January, February, March and April (9km).
The months with the lowest visibility are September and October (6km).
