Costa RicaAverage weather for Arenal in January
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.
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. No precipitation expected at the start of the month; it’ll be sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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.
Arenal in January |
New York | ||
|---|---|---|---|
 Average temperature |
33°C | 5°C | |
 Max. temperature |
36°C | 11°C | |
| Min. temperature |
33°C | -5°C | |
 Total precipitation |
9,4 mm | 97 mm | |
| Rainy days |
0 days | 12 days | |
December
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.
Is January a good time to visit Arenal?
January is a good month to be in Arenal for sunny weather. You’ll have high temperatures and not too much rain.
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.
Check out the climate of Arenal for all months and discover the best travel time
Daily Temperature in January in Arenal
This chart shows the average daily high and low temperatures in January for Arenal, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in January in Arenal
The chart below shows the average daily precipitation in January for Arenal, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect it to stay dry all month in Arenal.
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.
Temperature in January in Arenal over the years
This chart shows the average temperature in January in Arenal, measured in degrees Celsius, over the past few years.
Total precipitation in January in Arenal over the years
This chart shows the average precipitation in January in Arenal, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
Weather experiences in January in Arenal
Have you been to Arenal in January?
Share your weather experience in January in Arenal.
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.
