Saint John in december: average Weather, Temperature and Climate
Weather in Saint John in december 2026
The weather in Saint John in december comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 138.8cm
Weather at 6am
31°F
Cloudy
32% of time
30%
19%
7%
Weather at 12pm
34°F
Cloudy
38% of time
25%
20%
8%
Weather at 6pm
32°F
Cloudy
35% of time
28%
20%
8%
Weather at 3am
31°F
26%
22%
21%
14%
Evolution of daily average temperature and precipitation in Saint John in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Saint John in december.
The climate of Saint John in december is very bad
The climate in december in Saint John is wet (with 4.4in of precipitation over 7 days). Unfortunately, the weather conditions is worsening than the previous month since in november there is an average of 3.6in of rainfall over 5 days.
The climate is rather cold around this city this month. Plan a sweater! The thermometer averaged maximum of 38°F. In the morning the temperature drops to 29°F. Thus, the mean temperature average in december in Saint John is 32°F. Note that seasonal normals in contrast with those observed in Saint John in the month of december with a maximum record of 58°F in 2018 and a minimum record of 0°F in 2013. You can expect to have about 20 days with temperatures below 32°F, or 65% of time.
On this month of december, day length in Saint John is generally 08:45. The sun rises at 07:57 and sets at 16:42.
Seasonal average climate and temperature of Saint John in december
Check below seasonal norms These datas are set from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 32°F | ||||
| Highest temperature | 38°F | ||||
| Lowest temperature | 29°F | ||||
| Highest record temperature | 58°F (2018) | ||||
| Lowest record temperature | 0°F (2013) | ||||
| Number of days at -32°F | 20 day(s) (65%) | ||||
| Sea temperature | |||||
| Average sea temperature | 45°F | ||||
| Lowest sea temperature | 41°F | ||||
| Highest sea temperature | 49°F | ||||
| Wind | |||||
| Wind speed | 24km/h | ||||
| Wind temperature | 20°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.4in | ||||
| Number of days with rainfall | 7 day(s) (22%) | ||||
| Record daily rainfall | 2.5in (2010) | ||||
| Snowfall | 138.8cm | ||||
| Other climate data | |||||
| Humidity | 86% | ||||
| Visibility | 8.68km | ||||
| Cloud cover | 59% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 6 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:57 | ||||
| Time of sunset | 16:42 | ||||
| Length of day | 08:45 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Saint John in december 2025:
40°F to 47°F
25°F to 36°F
31°F to 36°F
20°F to 38°F
13°F to 23°F
18°F to 38°F
31°F to 36°F
20°F to 23°F
9°F to 29°F
34°F to 45°F
34°F to 47°F
20°F to 29°F
22°F to 29°F
31°F to 32°F
22°F to 25°F
18°F to 32°F
38°F to 41°F
29°F to 41°F
45°F to 50°F
29°F to 45°F
40°F to 43°F
22°F to 27°F
18°F to 25°F
25°F to 27°F
22°F to 29°F
14°F to 20°F
9°F to 25°F
13°F to 31°F
25°F to 40°F
27°F to 41°F
13°F to 27°F
Map: other cities in Canada in december
Cities near Saint John:
| Fredericton in december | very bad weather |
| Fundy National Park in december | very bad weather |
| Moncton in december | very bad weather |
| Yarmouth in december | very bad weather |
| Miramichi in december | very bad weather |
| Hebron (Prince Edward Island) in december | very bad weather |
| Halifax in december | very bad weather |
| Charlottetown in december | very bad weather |
| Bathurst in december | very bad weather |
| Cape Breton Island in december | very bad weather |
| Quebec City in december | very bad weather |
| Sydney in december | very bad weather |
Click over cities on the map for information about the weather in december.
Saint John
perfect weather
good
tolerable
bad
very bad
Weather data for Saint John in december:
Weather data for Saint John for december are derived from an average of the weather forecast since 2009 in Saint John. There is a margin of error and these forecasts are to be considered as general information only. The weather in Saint John can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Saint John.