Temperatures in December
It's warm in December in Johnston Atoll with an average temperature of 27°C. Temperatures this month range from a low of 26°C to a high of 27°C. At night, you can expect temperatures between 25°C and 26°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Johnston Atoll in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Johnston Atoll with hot temperatures, averaging around 27°C during the day and nights close to 26°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-December
By mid-December, the average daytime temperature stays the same at 27°C, with nights close to 26°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of December
By the end of December, the average daytime temperature in Johnston Atoll will be around 27°C, with nights close to 26°C. A shower might show up, but overall the weather will be dry and sunny. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Precipitation in December
In December, there is an average of 108 mm of precipitation, spread over 16 days. The wind speed is around 5 Bft, mostly coming from the East.
Across the whole month, the average precipitation chance is 51% per day.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Johnston Atoll. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Johnston Atoll in December |
UK | ||
|---|---|---|---|
 Average Temperature |
27°C | 9°C | |
 High Temp |
27°C | 11°C | |
| Low Temp |
26°C | 8°C | |
 Total Precipitation |
108 mm | 67 mm | |
| Rainy Days |
16 days | 10 days | |
November
UV index
The UV index is a maximum of 8 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 December a good time to visit Johnston Atoll?
After some sun? Then December isn’t the best time to be in Johnston Atoll. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Johnston Atoll in December
With 28°C, Johnston Atoll hit the highest temperature in the last 10 years in December 2014. The lowest daytime temperature in this month was 23°C in 2021. The extreme night temperatures ranged from a low of 19°C to a high of 27°C.
Check out the climate of Johnston Atoll for all months and discover the best travel time
Daily Temperature in December in Johnston Atoll
This chart shows the average daily temperatures, both day and night, for each day in December in Johnston Atoll, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Johnston Atoll
The chart below shows the average daily precipitation in December for Johnston Atoll, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 16 days of rain in Johnston Atoll.
Daily UV Index in December in Johnston Atoll
This chart shows the average daily UV index in December in Johnston Atoll, 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 December in Johnston Atoll Over the Years
This chart shows the average temperature in December in Johnston Atoll, measured in degrees Celsius, over the past years.
Total Precipitation in December in Johnston Atoll Over the Years
This chart shows the average precipitation in December in Johnston Atoll, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for Johnston Atoll
Click on a specific day in December for detailed info on the typical weather on that day in Johnston Atoll. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Johnston Atoll
Have you been to Johnston Atoll in December?
Share your weather experience in December in Johnston Atoll.
Average Weather in Johnston Atoll by Month
Click on a month below to see detailed weather info for Johnston Atoll. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Johnston Atoll for all months at once
