Washington DC Weather in January
United States · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Washington DC sees average temperatures ranging from a low of -1.1°C (30.0°F) to a high of 7.3°C (45.1°F), with a mean of 2.9°C (37.2°F). Compared to the annual average of 14.2°C (57.6°F), this month is 11.3°C cooler than the yearly norm. This is the coldest month of the year, with average lows of -1.1°C (30.0°F). Precipitation averages 86.9mm, making it approximately 32.0mm drier than the monthly average of 119.0mm. This is the driest month of the year, with just 86.9mm of precipitation. The city receives an average of 5.9 hours of sunshine per day during January, with relative humidity averaging 70.1%. Wind speeds reach an average maximum of 18.8 km/h. Snowfall averages 10.9cm during January, which can affect travel plans and outdoor activities. For travelers, this month offers a coldest month of the year experience in Washington DC, with drier-than-average conditions compared to the rest of the year.
There's something about Washington DC in late March when the cherry blossoms peak that turns the political city into something tender. I stood at the Tidal Basin one spring as 3,000 trees bloomed pink against the Jefferson Memorial — the data says peak bloom is usually the last week of March to first week of April, around 15°C. Summer (June-August) is famously brutal: 30°C with 70% humidity, the kind that makes the National Mall feel like a sauna. October is DC's secret weapon: 18°C, golden leaves along the Mall, and the cultural season reopening. Winter is quieter and the museums are empty — a trade-off worth making.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 4.6°C (40.3°F) | 2.9°C (37.2°F) | 4.5°C (40.1°F) |
| Rainfall | 116.2mm | 86.9mm | 89.2mm |
| Sunshine | 6.2 hrs | 5.9 hrs | 6.8 hrs |
| Humidity | 71.2% | 70.1% | 67.3% |
| Wind | 17.1 km/h | 18.8 km/h | 18.4 km/h |
| Rainy Days | 12.2 | 11.4 | 12.4 |
| Snowfall | 1.8 cm | 10.9 cm | 8.3 cm |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Washington DC in January, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Washington DC in January?
The average temperature in Washington DC during January ranges from -1.1°C (30.0°F) to 7.3°C (45.1°F), with a mean of 2.9°C (37.2°F).
How much does it rain in Washington DC in January?
Washington DC receives an average of 86.9mm of precipitation in January, spread across approximately 11.4 rainy days. This is the driest month of the year.
What should I pack for Washington DC in January?
Based on January weather data, pack heavy winter clothing, thermal layers, and a warm coat.
Is January a good time to visit Washington DC?
January is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Washington DC
Cities with Similar January Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 38.9°, -77.04°. Timezone: America/New_York. Last updated: 2026-07-30.