Saint John Weather in December
Average highs run from 50°F on December 1 to 44°F on December 31, and lows from 26°F to 21°F. Normal precipitation for the month is 1.05 in over about 3 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 45°F
- Average low
- 23°F
- Precipitation
- 1.05 in
- Snowfall
- 4.2 in
- Record high
- 85°FDec 24, 1955
- Record low
- -20°FDec 23, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 44 min to 9 h 34 min
- Cloud cover
- 54%
- Humidity
- 73%
- Dew point
- 24°F
- Wind
- 11.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 50°F | 26°F | 74°F 1995 | 0°F 1985 | 11% | 4% |
| Dec 2 | 49°F | 26°F | 79°F 2021 | 0°F 1985 | 11% | 4% |
| Dec 3 | 49°F | 26°F | 79°F 2021 | 0°F 1895 | 11% | 4% |
| Dec 4 | 48°F | 26°F | 72°F 1965 | 5°F 1902 | 11% | 5% |
| Dec 5 | 48°F | 25°F | 73°F 1989 | 2°F 1897 | 11% | 5% |
| Dec 6 | 48°F | 25°F | 78°F 1939 | -3°F 1972 | 11% | 5% |
| Dec 7 | 47°F | 25°F | 73°F 1966 | -4°F 2005 | 11% | 5% |
| Dec 8 | 47°F | 25°F | 72°F 1940 | -7°F 1917 | 11% | 5% |
| Dec 9 | 47°F | 24°F | 72°F 1957 | -6°F 1919 | 11% | 5% |
| Dec 10 | 46°F | 24°F | 74°F 1933 | -7°F 1919 | 11% | 5% |
| Dec 11 | 46°F | 24°F | 76°F 1939 | -6°F 1917 | 11% | 5% |
| Dec 12 | 46°F | 24°F | 70°F 1927 | -8°F 1932 | 11% | 6% |
| Dec 13 | 45°F | 23°F | 75°F 1921 | -4°F 1917 | 11% | 6% |
| Dec 14 | 45°F | 23°F | 72°F 1933 | -6°F 1901 | 11% | 6% |
| Dec 15 | 45°F | 23°F | 71°F 2021 | -10°F 1989 | 11% | 6% |
| Dec 16 | 45°F | 23°F | 74°F 1962 | -3°F 1989 | 11% | 6% |
| Dec 17 | 45°F | 23°F | 75°F 1939 | -1°F 1964 | 11% | 6% |
| Dec 18 | 44°F | 22°F | 74°F 1979 | -12°F 2016 | 11% | 6% |
| Dec 19 | 44°F | 22°F | 69°F 2013 | -12°F 2016 | 11% | 6% |
| Dec 20 | 44°F | 22°F | 72°F 1966 | -10°F 1983 | 11% | 6% |
| Dec 21 | 44°F | 22°F | 73°F 1933 | -10°F 1983 | 11% | 6% |
| Dec 22 | 44°F | 22°F | 75°F 1933 | -19°F 1989 | 11% | 6% |
| Dec 23 | 44°F | 22°F | 73°F 1933 | -20°F 1989 | 11% | 6% |
| Dec 24 | 44°F | 21°F | 85°F 1955 | -10°F 1983 | 11% | 6% |
| Dec 25 | 44°F | 21°F | 75°F 1901 | -8°F 1983 | 11% | 6% |
| Dec 26 | 44°F | 21°F | 67°F 1908 | -4°F 1962 | 11% | 6% |
| Dec 27 | 44°F | 21°F | 70°F 1976 | 1°F 1911 | 11% | 6% |
| Dec 28 | 44°F | 21°F | 70°F 1928 | -8°F 1924 | 10% | 6% |
| Dec 29 | 44°F | 21°F | 70°F 1922 | -12°F 1983 | 10% | 6% |
| Dec 30 | 44°F | 21°F | 77°F 1901 | -9°F 1983 | 10% | 6% |
| Dec 31 | 44°F | 21°F | 79°F 1901 | -7°F 1911 | 10% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:32 AM, sunset 5:16 PM
- December 31
- sunrise 7:51 AM, sunset 5:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00143847 (Hudson), public domain. Records: NOAA GHCN-Daily, station USC00146549, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.