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 advent notes a subtle adjustment in average high-temperature to a still moderately hot 25.7°C (78.3°F) from August. San Joaquín, during the nights of September, averages a temperature close to its daytime high, at a pleasant 21.3°C (70.3°F).Humidity
September and October, with an average relative humidity of 86%, are the most humid months.Rainfall
In September, the rain falls for 29.6 days. Throughout September, 267mm (10.51") of precipitation is accumulated. Throughout the year, there are 290 rainfall days, and 2270mm (89.37") of precipitation is accumulated.Daylight
In September, the average length of the day 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, in San Joaquín, sunrise is at 05:25 and sunset at 17:27 CST.
Sunshine
In September, the average sunshine is 8.2h.UV index
The months with the highest UV index in San Joaquín, Costa Rica, are January through December, with an average maximum UV index of 6. The months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What are the temperatures in San Joaquín in September?
What is the most humid month in San Joaquín?
What is the average humidity in September in San Joaquín?
How much does it rain in San Joaquín in September?
How many hours of daylight does San Joaquín have in September?
When is the sunrise / sunset in September in San Joaquín?
How long on average sun shines in September in San Joaquín?
What are the months with the highest UV index in San Joaquín?
When is the lowest UV index in San Joaquín?
What is the UV index intensity in September in San Joaquín?
Average temperature in September
San Joaquín, Costa Rica
- Average high temperature in September: 25.7°C
The warmest month (with the highest average high temperature) is March (29.3°C).
The month with the lowest average high temperature is October (25.3°C).
- Average low temperature in September: 21.3°C
The month with the highest average low temperature is April (21.9°C).
The coldest months (with the lowest average low temperature) are January, February and December (20.5°C).
Average pressure in September
San Joaquín, Costa Rica
- Average pressure in September: 1011.1mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The months with the lowest atmospheric pressure are October and November (1010.9mbar).
Average wind speed in September
San Joaquín, Costa Rica
- Average wind speed in September: 5.3km/h
The windiest months (with the highest average wind speed) are February and March (7.6km/h).
The calmest month (with the lowest average wind speed) is June (5.2km/h).
Average humidity in September
San Joaquín, Costa Rica
- Average humidity in September: 86%
The months with the highest relative humidity are September and October (86%).
The months with the lowest relative humidity are February and March (68%).
Average rainfall in September
San Joaquín, Costa Rica
- Average rainfall in September: 267mm
The wettest month (with the highest rainfall) is October (440mm).
The driest month (with the least rainfall) is February (18mm).
Average rainfall days in September
San Joaquín, Costa Rica
- Average rainfall days in September: 29.6 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (9.7 days).
Average daylight in September /
Average sunshine in September
San Joaquín, 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: 8h and 1min
The month with the most sunshine is February (Average sunshine: 9h and 48min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).
Average sunshine days in September
San Joaquín, Costa Rica
- Average sunshine days in September: 0.2 days
The month with the most sunshine days is February (13.7 days).
The month with the least sunshine days is September (0.2 days).
Average UV index in September
San Joaquín, Costa Rica
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
San Joaquín, Costa Rica
- Average cloud cover in September: 45
The month with the most cloud cover is October (Cloud cover 49).
The month with the least cloud cover is February (Cloud cover 15).
Average visibility in September
San Joaquín, Costa Rica
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
San Joaquín, Costa Rica
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