Hartford weather in December: Hartford, Connecticut: normal highs, lows, rain and records for December
Hartford in December has a normal high of 41°F and a normal low of 25°F, a daily mean of 33°F, falling from 45°F on the 1st to 37°F by the 31st. Measurable precipitation falls on 12 days in a normal December, 4.08 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −4°C, 104 mm of precipitation and 26 cm of snow in December.
- NOAA stationHartford-Bradley International Airport
- Station IDUSW00014740
- Location41.94°N 72.68°W
- Elevation190 ft (58 m)
- From the center12 miles
- Population122,129
- Jan 35° 19°
- Feb 39° 21°
- Mar 47° 28°
- Apr 61° 38°
- May 72° 48°
- Jun 80° 58°
- Jul 85° 63°
- Aug 83° 62°
- Sep 76° 54°
- Oct 64° 42°
- Nov 52° 33°
- Dec 41° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hartford in December?
The normal high is 41°F and the normal low 25°F, for a daily mean of 32.6°F. December is 9.7°F cooler than November and 5.5°F warmer than January. December is the 10th warmest month of the year in Hartford and the 6th wettest. Across the month the normal high falls 8°F, from 45°F on December 1 to 37°F on December 31. From one year to the next December's mean temperature typically moves about 3.8°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 29°F and 36°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 45°F | 29°F | 36% | 23% |
| December 8 | 43°F | 27°F | 36% | 23% |
| December 15 | 41°F | 25°F | 37% | 23% |
| December 22 | 39°F | 23°F | 37% | 23% |
| December 31 | 37°F | 21°F | 37% | 23% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 45°F | 29°F | 36% | 23% | 9 h 20 min |
| December 2 | 45°F | 28°F | 36% | 23% | 9 h 20 min |
| December 3 | 45°F | 28°F | 36% | 23% | 9 h 20 min |
| December 4 | 44°F | 28°F | 36% | 23% | 9 h 20 min |
| December 5 | 44°F | 27°F | 36% | 23% | 9 h 20 min |
| December 6 | 44°F | 27°F | 36% | 23% | 9 h 20 min |
| December 7 | 43°F | 27°F | 36% | 23% | 9 h 20 min |
| December 8 | 43°F | 27°F | 36% | 23% | 9 h 10 min |
| December 9 | 43°F | 26°F | 37% | 23% | 9 h 10 min |
| December 10 | 42°F | 26°F | 37% | 23% | 9 h 10 min |
| December 11 | 42°F | 26°F | 37% | 23% | 9 h 10 min |
| December 12 | 42°F | 26°F | 37% | 23% | 9 h 10 min |
| December 13 | 41°F | 25°F | 37% | 23% | 9 h 10 min |
| December 14 | 41°F | 25°F | 37% | 23% | 9 h 10 min |
| December 15 | 41°F | 25°F | 37% | 23% | 9 h 10 min |
| December 16 | 40°F | 25°F | 37% | 23% | 9 h 10 min |
| December 17 | 40°F | 24°F | 37% | 23% | 9 h 10 min |
| December 18 | 40°F | 24°F | 37% | 23% | 9 h 10 min |
| December 19 | 40°F | 24°F | 37% | 23% | 9 h 10 min |
| December 20 | 39°F | 24°F | 37% | 23% | 9 h 10 min |
| December 21 | 39°F | 23°F | 37% | 23% | 9 h 10 min |
| December 22 | 39°F | 23°F | 37% | 23% | 9 h 10 min |
| December 23 | 39°F | 23°F | 37% | 23% | 9 h 10 min |
| December 24 | 38°F | 23°F | 37% | 23% | 9 h 10 min |
| December 25 | 38°F | 22°F | 37% | 23% | 9 h 10 min |
| December 26 | 38°F | 22°F | 37% | 23% | 9 h 10 min |
| December 27 | 38°F | 22°F | 37% | 23% | 9 h 10 min |
| December 28 | 37°F | 22°F | 37% | 23% | 9 h 10 min |
| December 29 | 37°F | 21°F | 37% | 23% | 9 h 10 min |
| December 30 | 37°F | 21°F | 37% | 23% | 9 h 10 min |
| December 31 | 37°F | 21°F | 37% | 23% | 9 h 10 min |
- Normal high
- 41°FDecember average
- Normal low
- 25°FDecember average
- Precipitation
- 4.08 inmonth total
- Days with precipitation
- 120.01 inch or more
- Snowfall
- 10.1 inmonth total
- Nights at 32°F or colder
- 25
- Daylight
- 9 h 20 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 67%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014740; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Hartford in December?
On a given December day the chance of 0.01 inch or more is 37% on average, highest around December 27 (37%). In all, 4.08 in falls on 12 days of a normal December, 1 of them with an inch or more.
In a normal December in Hartford, 25 nights fall to freezing, 6 days stay below freezing all day and snowfall averages 10.1 inches.
Snow falls on 5 days in a normal December.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014740.
How humid and windy is Hartford in December?
At 3 p.m. the normal temperature is 35°F with 54% relative humidity and a dew point of 21°F; at 6 a.m. it is 27°F with 74% humidity. The wind averages 8.2 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 27°F | 20°F | 74% | 6.9 mph | 41% |
| 9 a.m. | 29°F | 20°F | 70% | 7.8 mph | 30% |
| noon | 34°F | 21°F | 58% | 10.0 mph | – |
| 3 p.m. | 35°F | 21°F | 54% | 10.6 mph | – |
| 6 p.m. | 32°F | 20°F | 62% | 8.5 mph | 37% |
| 9 p.m. | 30°F | 20°F | 68% | 7.8 mph | 42% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014740. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Hartford?
The warmest December temperature on Hartford's official record (since 1905) is 76°F, on December 7, 1998; the coldest is −18°F, on December 30, 1917. The wettest December brought 8.36 in (1969); the snowiest, 45.3 inches (1945).
The December mean against the 1991-2020 normal of 32.6°F: 2021 38.0°F (+5.4), 2022 34.0°F (+1.4), 2023 39.1°F (+6.5), 2024 33.8°F (+1.2), 2025 28.0°F (−4.6). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.0°F | +5.4°F | 2.95 in |
| 2022 | 34.0°F | +1.4°F | 4.50 in |
| 2023 | 39.1°F | +6.5°F | 8.04 in |
| 2024 | 33.8°F | +1.2°F | 4.22 in |
| 2025 | 28.0°F | −4.6°F | 3.35 in |
Source: records: ACIS, NWS threaded record BDLthr; recent months: ACIS, station USW00014740. Records and recent months use complete months only.
How does December in Hartford compare across Connecticut?
Across the 13 places PlainClimate covers in Connecticut, December normal highs run from 35°F in Norfolk to 44°F in Groton; Hartford's is 41°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.