Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
November's transformation into December witnesses an average high-temperature of a moderately hot 23.4°C (74.1°F), noting a minor change from the preceding month. December's nights observe an average temperature of 14°C (57.2°F).Humidity
In December, the average relative humidity in San Isidro is 84%.Rainfall
In San Isidro, in December, it is raining for 19.5 days, with typically 65mm (2.56") of accumulated precipitation. In San Isidro, during the entire year, the rain falls for 287.8 days and collects up to 2585mm (101.77") of precipitation.Daylight
With an average of 11h and 36min of daylight, December has the shortest days of the year.On the first day of December in San Isidro, sunrise is at 05:37 and sunset at 17:12. On the last day of the month, sunrise is at 05:52 and sunset at 17:26 CST.
Sunshine
In San Isidro, Costa Rica, the average sunshine in December is 7.8h.UV index
January through December, with an average maximum UV index of 5, are months with the highest UV index in San Isidro. January through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 5 in December translates into these instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are December temperatures in San Isidro?
What is the average humidity in December in San Isidro?
How much does it rain in San Isidro in December?
What is the month with the shortest days in San Isidro?
What is the average length of the day in December in San Isidro?
What time are sunrise and sunset in December in San Isidro?
How long on average sun shines in December in San Isidro?
What are the months with the highest UV index in San Isidro?
What are the months with the lowest UV index in San Isidro?
What is the UV index reading in December in San Isidro?
Average temperature in December
San Isidro, Costa Rica
- Average high temperature in December: 23.4°C
The warmest month (with the highest average high temperature) is April (26°C).
The month with the lowest average high temperature is October (22.4°C).
- Average low temperature in December: 14°C
The month with the highest average low temperature is June (17°C).
The coldest month (with the lowest average low temperature) is January (13.8°C).
Average pressure in December
San Isidro, Costa Rica
- Average pressure in December: 1011.7mbar
The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).
Average wind speed in December
San Isidro, Costa Rica
- Average wind speed in December: 9km/h
The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest month (with the lowest average wind speed) is September (4.3km/h).
Average humidity in December
San Isidro, Costa Rica
- Average humidity in December: 84%
The months with the highest relative humidity are September and October (91%).
The months with the lowest relative humidity are February and March (75%).
Average rainfall in December
San Isidro, Costa Rica
- Average rainfall in December: 65mm
The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).
Average rainfall days in December
San Isidro, Costa Rica
- Average rainfall days in December: 19.5 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (12.2 days).
Average daylight in December /
Average sunshine in December
San Isidro, Costa Rica
- Average daylight in December: 11h and 4min
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 December: 7h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is October (Average sunshine: 5h and 48min).
Average sunshine days in December
San Isidro, Costa Rica
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is March (13.5 days).
The month with the least sunshine days is September (0.1 days).
Average UV index in December
San Isidro, Costa Rica
- Average UV index in December: 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 December
San Isidro, Costa Rica
- Average cloud cover in December: 45
The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 30).
Average visibility in December
San Isidro, Costa Rica
- Average visibility in December: 8km
The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are August, September, October and November (6km).
San Isidro, Costa Rica
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