January is one of the cooler months of the year in Arlington, with average highs near 13.3°C and lows around 1.2°C (mean 7.3°C). It is one of the drier months, averaging 58 mm of rainfall and 74% relative humidity across the period.
January is one of the cooler months of the year in Arlington. Across 45 years of records, the warmest January in Arlington was 2006 — when the month averaged 12.5°C — while the coldest was 1985 at 2.6°C. Typical January days reach 13.3°C with nights near 1.2°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Arlington, averaging 58 mm of rainfall. The wettest January on record was 1990 with 153 mm, while the driest was 1986 at 2 mm.
Relative humidity in Arlington during January averages 74%. The most humid January was 1998 at 86%, and the least humid was 2006 at 50%.
January receives about 3 kWh/m²/day of solar energy in Arlington. The sunniest January was 2014 at 3.6 kWh/m²/day, and the cloudiest was 1993 at 2.2.
Average wind speed in Arlington during January is 3.1 m/s. The windiest January was 1996 at 4 m/s, while the calmest was 2011 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.0°C | 7.3°C | 8.0°C | 7.1°C | 7.8°C | +1.8°C |
| Avg High | 12.0°C | 13.2°C | 14.2°C | 13.2°C | 13.9°C | +1.9°C |
| Avg Low | -0.1°C | 1.5°C | 1.9°C | 1.0°C | 1.7°C | +1.8°C |
| Avg Rain | 36 mm | 77 mm | 58 mm | 65 mm | 52 mm | +16 mm |
January temperatures in Arlington have risen by about 2.3°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -13.5°C (1982) to a record high of 29.2°C (2006).
Rainfall in January is one of the drier months, averaging 58 mm, with a wettest year of 153 mm.
A quieter season to visit Arlington
If your dates are flexible, the more temperate months of May and October tend to be the most comfortable for visiting Arlington. That said, January — with days averaging 13.3°C and nights around 1.2°C (mean 7.3°C) and moderate rainfall (58 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 | 11.5°C | 5.5°C | -0.5°C | 20.9°C | -7.1°C | 95 mm | 69% | 3 m/s | 3.2 |
| 2024 | 11.3°C | 5.6°C | -0.2°C | 23.1°C | -10.5°C | 79 mm | 71% | 3.1 m/s | 3 |
| 2023 | 16.0°C | 10.0°C | 4.0°C | 25.5°C | -2.8°C | 33 mm | 72% | 3.3 m/s | 3 |
| 2022 | 14.7°C | 7.4°C | 0.0°C | 23.8°C | -7.2°C | 5 mm | 58% | 3.4 m/s | 3.4 |
| 2021 | 13.9°C | 8.3°C | 2.7°C | 22.7°C | -3.1°C | 28 mm | 74% | 3.1 m/s | 3 |
| 2020 | 15.9°C | 10.1°C | 4.3°C | 25.9°C | -1.8°C | 70 mm | 77% | 3.1 m/s | 2.7 |
| 2019 | 12.5°C | 6.8°C | 1.0°C | 20.8°C | -5.0°C | 44 mm | 79% | 3.2 m/s | 2.8 |
| 2018 | 12.7°C | 6.2°C | -0.3°C | 22.4°C | -7.9°C | 11 mm | 65% | 3.3 m/s | 3.4 |
| 2017 | 15.9°C | 9.8°C | 3.8°C | 25.5°C | -7.8°C | 76 mm | 71% | 3.3 m/s | 3 |
| 2016 | 12.6°C | 6.8°C | 0.9°C | 21.7°C | -4.6°C | 21 mm | 80% | 2.8 m/s | 3.2 |
| 2015 | 11.9°C | 6.4°C | 0.8°C | 24.3°C | -7.1°C | 100 mm | 74% | 2.8 m/s | 2.9 |
| 2014 | 12.7°C | 5.9°C | -0.9°C | 22.7°C | -8.8°C | 11 mm | 65% | 3.6 m/s | 3.6 |
| 2013 | 14.6°C | 8.6°C | 2.6°C | 25.7°C | -5.2°C | 97 mm | 77% | 2.9 m/s | 2.9 |
| 2012 | 15.9°C | 9.5°C | 3.0°C | 23.7°C | -3.0°C | 136 mm | 74% | 3.3 m/s | 3.4 |
| 2011 | 11.5°C | 5.0°C | -1.5°C | 22.6°C | -10.7°C | 65 mm | 73% | 2.3 m/s | 3.1 |
| 2010 | 11.5°C | 6.0°C | 0.5°C | 21.1°C | -9.3°C | 89 mm | 80% | 2.9 m/s | 2.8 |
| 2009 | 15.3°C | 8.0°C | 0.7°C | 27.1°C | -7.3°C | 28 mm | 62% | 3.2 m/s | 3.5 |
| 2008 | 12.7°C | 6.7°C | 0.8°C | 23.9°C | -5.0°C | 21 mm | 71% | 3.3 m/s | 2.9 |
| 2007 | 10.1°C | 4.9°C | -0.4°C | 22.0°C | -5.7°C | 118 mm | 79% | 2.8 m/s | 2.5 |
| 2006 🔥 | 19.9°C | 12.5°C | 5.0°C | 29.2°C | 1.0°C | 63 mm | 50% | 3.8 m/s | 3.3 |
| 2005 | 14.5°C | 9.2°C | 3.8°C | 23.4°C | -5.5°C | 85 mm | 81% | 3.1 m/s | 2.6 |
| 2004 | 15.4°C | 9.2°C | 3.0°C | 26.2°C | -5.9°C | 75 mm | 73% | 3.3 m/s | 2.8 |
| 2003 | 12.5°C | 6.4°C | 0.3°C | 23.0°C | -6.2°C | 10 mm | 76% | 3 m/s | 3.1 |
| 2002 | 14.9°C | 8.6°C | 2.2°C | 25.0°C | -6.6°C | 63 mm | 73% | 3.3 m/s | 3 |
| 2001 | 11.1°C | 5.6°C | 0.1°C | 19.3°C | -6.8°C | 73 mm | 83% | 2.8 m/s | 2.7 |
| 2000 | 15.5°C | 9.3°C | 3.0°C | 26.3°C | -6.7°C | 46 mm | 71% | 3.2 m/s | 3 |
| 1999 | 15.5°C | 9.1°C | 2.8°C | 23.9°C | -6.3°C | 66 mm | 79% | 3.5 m/s | 3.1 |
| 1998 | 14.8°C | 9.1°C | 3.5°C | 20.7°C | -2.9°C | 122 mm | 86% | 3.3 m/s | 2.6 |
| 1997 | 11.3°C | 5.7°C | 0.2°C | 25.1°C | -7.7°C | 37 mm | 76% | 3.5 m/s | 2.9 |
| 1996 | 13.2°C | 6.1°C | -1.0°C | 23.3°C | -7.4°C | 26 mm | 67% | 4 m/s | 3.1 |
| 1995 | 13.0°C | 7.3°C | 1.6°C | 22.7°C | -5.0°C | 74 mm | 80% | 3.2 m/s | 2.9 |
| 1994 | 12.1°C | 6.9°C | 1.7°C | 21.5°C | -6.0°C | 36 mm | 78% | 3.4 m/s | 2.7 |
| 1993 | 12.0°C | 6.7°C | 1.3°C | 22.2°C | -3.8°C | 63 mm | 82% | 2.6 m/s | 2.2 |
| 1992 | 11.7°C | 6.8°C | 1.8°C | 18.7°C | -7.2°C | 94 mm | 84% | 2.5 m/s | 2.8 |
| 1991 | 11.0°C | 5.5°C | 0.0°C | 19.1°C | -5.1°C | 99 mm | 82% | 2.9 m/s | 2.3 |
| 1990 🌧️ | 17.0°C | 10.2°C | 3.5°C | 24.1°C | -4.3°C | 153 mm | 67% | 3.4 m/s | 3 |
| 1989 | 15.0°C | 9.2°C | 3.5°C | 23.5°C | -3.5°C | 77 mm | 79% | 3.1 m/s | 2.6 |
| 1988 | 10.2°C | 4.5°C | -1.2°C | 22.9°C | -9.8°C | 15 mm | 77% | 3.4 m/s | 3 |
| 1987 | 11.8°C | 6.0°C | 0.1°C | 20.7°C | -7.1°C | 44 mm | 80% | 3.1 m/s | 3.1 |
| 1986 | 15.1°C | 8.2°C | 1.4°C | 23.5°C | -5.0°C | 2 mm | 73% | 3.1 m/s | 3.4 |
| 1985 ❄️ | 8.5°C | 2.6°C | -3.3°C | 18.0°C | -11.9°C | 24 mm | 77% | 3.2 m/s | 2.9 |
| 1984 | 9.7°C | 3.9°C | -1.9°C | 21.3°C | -10.6°C | 33 mm | 74% | 2.7 m/s | 2.9 |
| 1983 | 11.8°C | 6.1°C | 0.4°C | 20.3°C | -3.7°C | 43 mm | 81% | 2.9 m/s | — |
| 1982 | 12.3°C | 5.8°C | -0.7°C | 24.5°C | -13.5°C | 57 mm | 72% | 3.8 m/s | — |
| 1981 | 13.7°C | 7.3°C | 0.9°C | 23.8°C | -5.6°C | 24 mm | 71% | 2.5 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 13.3°C with lows near 1.2°C (mean 7.3°C), based on 45 years of NASA POWER data.
January averages 58 mm of rainfall in Arlington, one of the drier months. The wettest on record was 153 mm in 1990.
The hottest January reached 29.2°C in 2006. The coldest dipped to -13.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 2.3°C. Daytime highs moved from 11.2°C to 13.5°C and overnight lows from -0.9°C to 1.2°C over the same span.
January is one of the cooler months of the year in Arlington and one of the drier months, so plan for around 13.3°C daytime highs and 1.2°C at night.
Yes — January is the coldest month of the year in Arlington, averaging 7.3°C.
For January in Arlington, pack warm layers and a jacket for chilly mornings, with typical highs of 13.3°C and lows of 1.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 74% — moderately humid.
Average wind speed in January is 3.1 m/s. The windiest January on record averaged 4 m/s (1996).
The wettest January on record was 1990 with 153 mm. On average, January sees 58 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 Arlington 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.
