DominicaAverage weather for Portsmouth in December
It's warm in December in Portsmouth with an average temperature of 29°C. Temperatures this month range from a low of 29°C to a high of 30°C. At night, you can expect temperatures between 22°C and 23°C.
Start of December
The month of December starts in Portsmouth with hot temps, averaging around 30°C during the day and nights around 23°C. There are plenty of days with a good chance of precipitation.
Mid December
By mid-December, daytime temps stay steady at around 30°C, with nights around 23°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of December
By the end of December, the average daytime temperature in Portsmouth is around 29°C, while nighttime temps are about 23°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In December, there is an average of 176 mm of precipitation, spread over 20 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Portsmouth in December |
New York | ||
|---|---|---|---|
 Average temperature |
29°C | 9°C | |
 Max. temperature |
30°C | 12°C | |
| Min. temperature |
29°C | -5°C | |
 Total precipitation |
176 mm | 133 mm | |
| Rainy days |
20 days | 17 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 Portsmouth?
Looking for sun? December isn’t a good month to be in Portsmouth. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 31°C in 2023, Portsmouth reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 25°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 18°C to a highest value of 26°C.
Check out the climate of Portsmouth for all months and discover the best travel time
Daily Temperature in December in Portsmouth
This chart shows the average daily high and low temperatures in December for Portsmouth, 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 December in Portsmouth
The chart below shows the average daily precipitation in December for Portsmouth, 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 December, you can expect about 20 days of precipitation in Portsmouth.
Daily UV index in December in Portsmouth
This chart shows the average daily UV index in December in Portsmouth, 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 Portsmouth over the years
This chart shows the average temperature in December in Portsmouth, measured in degrees Celsius, over the past few years.
Total precipitation in December in Portsmouth over the years
This chart shows the average precipitation in December in Portsmouth, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in December for Portsmouth
Click on any day in December to get detailed info about the usual weather on that day in Portsmouth. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Portsmouth
Have you been to Portsmouth in December?
Share your weather experience in December in Portsmouth.
Average weather in Portsmouth by month
Click on a month below to see detailed weather info for Portsmouth. 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 Portsmouth for all months at once
