Mystic, CT weather in January
In January, Mystic sees highs around 39°F and lows around 24°F: cold, with frequent rain and some snow. There are about 11 days with rain or snow. Snowfall averages about 5.8 in. It is one of the coldest months in Mystic.
- Normal high
- 39°F
- Normal low
- 24°F
- Wet days
- 11
- 3.9 in total
- Snowfall
- 5.8 in
- snow on the ground 8 days
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 40°F | 39°F |
| Normal low | 26°F | 23°F |
| Chance of a wet day | 38% | 34% |
| Sunrise / sunset | 7:13 am / 4:28 pm | 7:00 am / 5:02 pm |
| Daylight | 9.3 h | 10.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical January day
- 6 am27°Fdew point 18°F
- 9 am29°Fdew point 19°F
- Noon34°Fdew point 20°F
- 3 pm36°Fdew point 20°F
- 6 pm32°Fdew point 20°F
- 9 pm30°Fdew point 20°F
NOAA hourly normals (local standard time) from Providence T F Green Airport (38 mi away); average wind 10 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°Fnot available
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below26 of 31
- Snow on the groundsnow depth 1 in or more8 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain and snow in January
Normal precipitation is 3.9 in; a dry January brings about 3.1 in and a wet one about 4.9 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 5.8 in, with about 3 days of an inch or more.
How January varies from year to year
- Warmest January, 1991-20202002: average high 45°F
- Coolest January2004: average high 31°F
- Wettest January1999: 6.7 in
- Driest January2004: 1.6 in
- Highest reading69°F (January 12, 2020)
- Lowest reading-6°F (January 16, 2009)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
January compared with December and February
| December | January | February | |
|---|---|---|---|
| Normal high | 44°F | 39°F | 41°F |
| Normal low | 30°F | 24°F | 25°F |
| Wet days | 12 | 11 | 10 |
| Comfortable days | – | – | 0 |
| Daylight | 9.2 h | 9.6 h | 10.6 h |
Highs change by -5°F from December and +2°F into February.
Nearby alternatives in January
- Warmer: Dover, DE241 mi · high 44°F · 10 wet days
- Cooler: Worcester, MA63 mi · high 32°F · 12 wet days
How Mystic ranks in January
- Normal high267th warmest of 378 cities; 1st of 5 in Connecticut
- Wet days293rd driest of 378
What to pack for Mystic in January
- A warm jacket – lows near 24°F, highs near 39°F
- A rain jacket or umbrella – rain or snow on about 11 days
- Waterproof boots – about 5.8 in of snow in a typical year
- A hat and gloves – about 26 freezing nights
Heating and cooling
January has 1045 heating degree days and 0 cooling degree days (base 65°F), 17% of the year's total heating and cooling demand.
Questions
How cold is Mystic in January?
The normal high is 39°F and the normal low is 24°F. From 1991 to 2020 the coldest January reading was -6°F (most recently on January 16, 2009).
Does it rain a lot in Mystic in January?
About 11 days in January have at least 0.01 in of precipitation, and the normal total is 3.9 in. The wettest January in 1991-2020 was in 1999 (6.7 in); the driest was in 2004 (1.6 in).
Does it snow in Mystic in January?
Yes. Normal snowfall in January is 5.8 in, and snow covers the ground on about 8 days.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Groton (USC00063207), 3.7 mi W of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Groton New London Airport (USW00014707), 4.7 mi WSW of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Providence T F Green Airport (USW00014765), 38 mi NE of the city center, 60 ft (52 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Groton-New London Airport (725046-14707), 4.7 mi WSW of the city center, 8 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).