Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
The shift to January signals an average high-temperature of a still moderately hot 23.9°C (75°F), subtly varied from December's 23.4°C (74.1°F). An average low-temperature of 13.8°C (56.8°F) is recorded during the nights in January.Humidity
In San Isidro, the average relative humidity in January is 78%.Rainfall
In San Isidro, in January, it is raining for 14.3 days, with typically 32mm (1.26") 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
The average length of the day in January is 11h and 37min.On the first day of January, sunrise is at 05:52 and sunset at 17:26. On the last day of the month, sunrise is at 05:58 and sunset at 17:40 CST.
Sunshine
In January, the average sunshine is 8.9h.UV index
January through December, with an average maximum UV index of 5, are months with the highest UV index. January through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 5 in January leads to these guidelines:
Be vigilant - Suggestions to stave off sun damage are provided. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature?
What is the average humidity in January?
How many days does it rain in January?
How many hours of daylight does San Isidro have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does San Isidro have in January?
When is the highest UV index?
What is the month with the lowest UV index?
What is the UV index reading in January in San Isidro?
Average temperature in January
San Isidro, Costa Rica
- Average high temperature in January: 23.9°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 January: 13.8°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 January
San Isidro, Costa Rica
- Average pressure in January: 1012.3mbar
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 January
San Isidro, Costa Rica
- Average wind speed in January: 10.5km/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 January
San Isidro, Costa Rica
- Average humidity in January: 78%
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 January
San Isidro, Costa Rica
- Average rainfall in January: 32mm
The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).
Average rainfall days in January
San Isidro, Costa Rica
- Average rainfall days in January: 14.3 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 January /
Average sunshine in January
San Isidro, Costa Rica
- Average daylight in January: 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 January: 8h 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 January
San Isidro, Costa Rica
- Average sunshine days in January: 13.1 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 January
San Isidro, Costa Rica
- Average UV index in January: 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 January
San Isidro, Costa Rica
- Average cloud cover in January: 33
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 January
San Isidro, Costa Rica
- Average visibility in January: 9km
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).
