January is one of the cooler months of the year in Danbury, with average highs near 0.3°C and lows around -8.3°C (mean -4°C). It is one of the drier months, averaging 83 mm of rainfall and 89% relative humidity across the period.
January is one of the cooler months of the year in Danbury. Across 45 years of records, the warmest January in Danbury was 2023 — when the month averaged 1.3°C — while the coldest was 1994 at -9.9°C. Typical January days reach 0.3°C with nights near -8.3°C. The long-term trend is warming, about 0.7°C per decade.
January is one of the drier months in Danbury, averaging 83 mm of rainfall. The wettest January on record was 1996 with 176 mm, while the driest was 1981 at 17 mm.
Relative humidity in Danbury during January averages 89%. The most humid January was 1994 at 96%, and the least humid was 2025 at 79%.
January receives about 1.8 kWh/m²/day of solar energy in Danbury. The sunniest Januarys were 2016, 2022 and 2025, among others at 2 kWh/m²/day, and the cloudiest were 2017, 2023 and 2024 at 1.5.
Average wind speed in Danbury during January is 0.6 m/s. The windiest January was 2000 at 0.8 m/s, while the calmest were 2021, 2023 and 2024, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -5.8°C | -3.4°C | -4.2°C | -3.9°C | -2.0°C | +3.8°C |
| Avg High | -1.3°C | 0.9°C | 0.1°C | 0.3°C | 1.9°C | +3.2°C |
| Avg Low | -10.3°C | -7.7°C | -8.5°C | -8.2°C | -6.0°C | +4.3°C |
| Avg Rain | 72 mm | 107 mm | 76 mm | 80 mm | 78 mm | +5 mm |
January temperatures in Danbury have risen by about 4.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -30.7°C (1994) to a record high of 19°C (2007).
Rainfall in January is one of the drier months, averaging 83 mm, with a wettest year of 176 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 0.8°C per decade, narrowing the gap between day and night.
A quieter season to visit Danbury
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Danbury. That said, January — with days averaging 0.3°C and nights around -8.3°C (mean -4°C) and higher rainfall (83 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 0.0°C | -3.8°C | -7.7°C | 9.0°C | -17.4°C | 29 mm | 79% | 0.7 m/s | 2 |
| 2024 | 2.4°C | -1.3°C | -5.1°C | 12.2°C | -12.9°C | 170 mm | 90% | 0.6 m/s | 1.5 |
| 2023 🔥 | 5.0°C | 1.3°C | -2.4°C | 11.5°C | -6.5°C | 116 mm | 90% | 0.6 m/s | 1.5 |
| 2022 | -0.8°C | -5.4°C | -10.1°C | 10.4°C | -18.9°C | 59 mm | 84% | 0.7 m/s | 2 |
| 2021 | 1.0°C | -2.6°C | -6.2°C | 5.3°C | -16.4°C | 43 mm | 88% | 0.6 m/s | 1.7 |
| 2020 | 3.8°C | -0.4°C | -4.6°C | 15.4°C | -11.7°C | 50 mm | 86% | 0.6 m/s | 1.8 |
| 2019 | 0.2°C | -4.2°C | -8.6°C | 10.2°C | -20.5°C | 119 mm | 88% | 0.7 m/s | 1.8 |
| 2018 | 0.2°C | -4.3°C | -8.8°C | 12.9°C | -21.0°C | 86 mm | 86% | 0.7 m/s | 1.8 |
| 2017 | 2.4°C | -0.7°C | -3.9°C | 12.4°C | -13.6°C | 90 mm | 88% | 0.6 m/s | 1.5 |
| 2016 | 1.7°C | -2.5°C | -6.7°C | 13.3°C | -15.6°C | 56 mm | 84% | 0.7 m/s | 2 |
| 2015 | -2.3°C | -7.0°C | -11.7°C | 5.0°C | -19.4°C | 97 mm | 89% | 0.7 m/s | 1.8 |
| 2014 | -1.4°C | -5.9°C | -10.4°C | 10.5°C | -21.0°C | 74 mm | 85% | 0.7 m/s | 1.8 |
| 2013 | 1.0°C | -3.1°C | -7.2°C | 13.5°C | -19.9°C | 62 mm | 89% | 0.6 m/s | 1.9 |
| 2012 | 2.8°C | -1.4°C | -5.5°C | 10.9°C | -15.8°C | 74 mm | 88% | 0.6 m/s | 2 |
| 2011 | -2.2°C | -6.5°C | -10.9°C | 7.2°C | -26.5°C | 74 mm | 94% | 0.6 m/s | 1.8 |
| 2010 | 0.6°C | -3.7°C | -7.9°C | 12.6°C | -15.6°C | 64 mm | 87% | 0.7 m/s | 1.8 |
| 2009 | -2.6°C | -6.9°C | -11.3°C | 2.3°C | -21.8°C | 63 mm | 91% | 0.6 m/s | 2 |
| 2008 | 2.4°C | -2.0°C | -6.3°C | 14.1°C | -16.2°C | 55 mm | 88% | 0.6 m/s | 2 |
| 2007 | 3.1°C | -0.9°C | -5.0°C | 19.0°C | -16.6°C | 83 mm | 86% | 0.6 m/s | 1.8 |
| 2006 | 4.1°C | -0.2°C | -4.5°C | 12.7°C | -15.6°C | 139 mm | 93% | 0.7 m/s | 1.7 |
| 2005 | -1.5°C | -5.7°C | -10.0°C | 11.1°C | -23.8°C | 121 mm | 92% | 0.7 m/s | 1.7 |
| 2004 | -4.2°C | -8.1°C | -12.0°C | 8.3°C | -23.0°C | 52 mm | 90% | 0.7 m/s | 1.8 |
| 2003 | -3.7°C | -8.4°C | -13.0°C | 1.9°C | -23.8°C | 68 mm | 95% | 0.7 m/s | 1.9 |
| 2002 | 4.3°C | 0.1°C | -4.2°C | 17.6°C | -12.5°C | 46 mm | 85% | 0.6 m/s | 1.7 |
| 2001 | -0.3°C | -5.1°C | -10.0°C | 5.8°C | -17.6°C | 51 mm | 96% | 0.6 m/s | 1.9 |
| 2000 | -0.5°C | -4.9°C | -9.2°C | 14.8°C | -20.2°C | 79 mm | 85% | 0.8 m/s | 1.8 |
| 1999 | 1.5°C | -3.2°C | -7.8°C | 11.5°C | -16.3°C | 166 mm | 87% | 0.6 m/s | 1.8 |
| 1998 | 3.9°C | -0.2°C | -4.4°C | 16.1°C | -16.7°C | 103 mm | 91% | 0.6 m/s | 1.6 |
| 1997 | 0.0°C | -4.2°C | -8.4°C | 10.5°C | -19.6°C | 81 mm | 87% | 0.7 m/s | 1.7 |
| 1996 🌧️ | -1.5°C | -6.2°C | -10.8°C | 11.8°C | -27.6°C | 176 mm | 95% | 0.7 m/s | 1.6 |
| 1995 | 2.6°C | -1.2°C | -5.0°C | 14.8°C | -14.3°C | 100 mm | 89% | 0.6 m/s | 1.8 |
| 1994 ❄️ | -4.7°C | -9.9°C | -15.2°C | 4.0°C | -30.7°C | 133 mm | 96% | 0.7 m/s | 1.7 |
| 1993 | 1.7°C | -2.4°C | -6.4°C | 13.1°C | -14.2°C | 69 mm | 88% | 0.6 m/s | 1.7 |
| 1992 | 1.8°C | -2.6°C | -7.0°C | 14.2°C | -14.3°C | 60 mm | 85% | 0.7 m/s | 1.8 |
| 1991 | 0.4°C | -3.9°C | -8.1°C | 8.0°C | -17.9°C | 68 mm | 88% | 0.6 m/s | 1.8 |
| 1990 | 3.1°C | -0.5°C | -4.2°C | 11.4°C | -8.3°C | 115 mm | 91% | 0.6 m/s | 1.6 |
| 1989 | 2.3°C | -2.1°C | -6.4°C | 10.2°C | -15.8°C | 44 mm | 86% | 0.6 m/s | 1.7 |
| 1988 | -1.9°C | -6.1°C | -10.2°C | 5.9°C | -19.2°C | 69 mm | 91% | 0.6 m/s | 1.8 |
| 1987 | -1.6°C | -6.1°C | -10.7°C | 7.6°C | -23.4°C | 119 mm | 96% | 0.7 m/s | 1.6 |
| 1986 | 0.4°C | -4.2°C | -8.8°C | 9.7°C | -19.6°C | 110 mm | 88% | 0.6 m/s | 1.9 |
| 1985 | -1.7°C | -5.8°C | -9.9°C | 10.6°C | -18.9°C | 26 mm | 83% | 0.7 m/s | 1.9 |
| 1984 | -2.2°C | -7.1°C | -11.9°C | 6.8°C | -23.9°C | 45 mm | 93% | 0.6 m/s | 1.7 |
| 1983 | 0.9°C | -3.5°C | -7.8°C | 9.0°C | -17.6°C | 103 mm | 86% | 0.6 m/s | — |
| 1982 | -4.3°C | -9.0°C | -13.6°C | 11.0°C | -23.4°C | 116 mm | 90% | 0.7 m/s | — |
| 1981 | -3.8°C | -8.4°C | -13.1°C | 4.4°C | -22.7°C | 17 mm | 87% | 0.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 0.3°C with lows near -8.3°C (mean -4°C), based on 45 years of NASA POWER data.
January averages 83 mm of rainfall in Danbury, one of the drier months. The wettest on record was 176 mm in 1996.
The hottest January reached 19°C in 2007. The coldest dipped to -30.7°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 4.4°C. Daytime highs moved from -2.2°C to 1.5°C and overnight lows from -11.3°C to -6.3°C over the same span.
January is one of the cooler months of the year in Danbury and one of the drier months, so plan for around 0.3°C daytime highs and -8.3°C at night.
Yes — January is the coldest month of the year in Danbury, averaging -4°C.
For January in Danbury, pack warm layers and a jacket for chilly mornings, with typical highs of 0.3°C and lows of -8.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 89% — quite humid.
Average wind speed in January is 0.6 m/s. The windiest January on record averaged 0.8 m/s (2000).
The wettest January on record was 1996 with 176 mm. On average, January sees 83 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Danbury behaves each January, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for January specifically, along with year-by-year records and how the month has changed over the decades.
