Climate averages 1991–2020
Hartford weather
in January.
A cold, moderately wet month: the coolest and the joint 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Hartford: daytime highs average 2.0°C and nights cool to about -6.9°C. By daytime temperature it is the coolest month of the year.
Expect about 84 mm of rain on roughly 9 days, which makes January a moderately wet month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 31 min on an average January day.
The nearest other city in this atlas is New Britain (14 km away). In January its highs average 2.0°C, about as warm as Hartford, with 84 mm of precipitation.
Among the 498 cities listed in the United States, Hartford ranks joint 391st of 498 for the warmest January highs and joint 306th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Hartford is 7.4°C cooler than that mean.
From January to February, average highs rise by 1.6°C to 3.6°C, and monthly rainfall falls from 84 mm to 76 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hartford climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 2.0°C-6.9°C | -6.9°C | 84 | 9.3 | 9.510 h |
| February | 3.6°C-6.1°C | -6.1°C | 76 | 8.7 | 10.611 h |
| March | 8.0°C-2.1°C | -2.1°C | 103 | 10.5 | 11.912 h |
| April | 14.7°C3.8°C | 3.8°C | 91 | 10.8 | 13.313 h |
| May | 20.4°C9.7°C | 9.7°C | 84 | 10.9 | 14.515 h |
| June | 25.4°C15.1°C | 15.1°C | 96 | 11.5 | 15.215 h |
| July | 28.6°C18.4°C | 18.4°C | 89 | 10.6 | 14.915 h |
| August | 27.6°C17.8°C | 17.8°C | 100 | 10.1 | 13.914 h |
| September | 23.4°C13.9°C | 13.9°C | 97 | 8.5 | 12.513 h |
| October | 16.6°C7.7°C | 7.7°C | 103 | 9.2 | 11.111 h |
| November | 10.3°C2.0°C | 2.0°C | 84 | 8.5 | 9.910 h |
| December | 4.7°C-3.1°C | -3.1°C | 104 | 10.0 | 9.29 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- New Britain in JanuaryUnited States · 14 kmHigh 2.0°C · Low -6.6°C · 84 mm precipitation
- Waterbury in JanuaryUnited States · 38 kmHigh 2.1°C · Low -5.9°C · 88 mm rain
- Springfield (Massachusetts), United States in JanuaryUnited States · 38 kmHigh 1.3°C · Low -7.4°C · 84 mm precipitation
- New Haven in JanuaryUnited States · 55 kmHigh 2.7°C · Low -3.6°C · 108 mm rain
- Danbury in JanuaryUnited States · 76 kmHigh 2.0°C · Low -6.0°C · 88 mm precipitation
- Bridgeport in JanuaryUnited States · 77 kmHigh 2.6°C · Low -3.8°C · 96 mm rain
- Worcester, United States in JanuaryUnited States · 92 kmHigh 0.7°C · Low -7.6°C · 85 mm precipitation
- Norwalk in JanuaryUnited States · 94 kmHigh 2.6°C · Low -4.1°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hartford) is explained once on the Hartford year overview and on the Sources, method and limits page.
New Britain lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.