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Costa RicaThe weather in January in Arenal
It's hot in January in Arenal with an average temperature of 33°C. Temperatures this month range from a low of 33°C to a high of 36°C. At night, you can expect temperatures between 21°C and 23°C.
January is a good month to be in Arenal for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Arenal, Costa Rica. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 58°C in 2018, Arenal reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 29°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 16°C to a highest value of 27°C.
Rainfall amount
According to weather history, there is only 9,4 mm of precipitation in January. The wind speed is around 5 Bft, mostly coming from the East.
Daily weather in January for Arenal
Click on any day in January to get detailed info about the usual weather on that day in Arenal. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Arenal | New York | |
|---|---|---|
| Average temperature | 33°C | 5°C |
| Max. temperature | 36°C | 11°C |
| Min. temperature | 21°C | -5°C |
| Total precipitation | 9,4 mm | 97 mm |
| Rainy days | 1 day | 12 days |
Start of January
The month of January starts in Arenal with hot temps, averaging around 34°C during the day and nights around 23°C.
Mid January
By mid-January, daytime temps drop to around 33°C, with nights around 23°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of January
By the end of January, the average daytime temperature in Arenal is around 34°C, while nighttime temps are about 22°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Arenal for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Arenal, Costa Rica. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Arenal
Temperature in January in Arenal over the years
Precipitation charts
These charts show the average amount of precipitation in January in Arenal, Costa Rica. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Arenal
Total precipitation in January in Arenal over the years
Daily UV index in January in Arenal
This chart shows the average daily UV index in January in Arenal, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Arenal
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Average weather in Arenal by month
Click on a month below to see detailed weather info for Arenal. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.