Fairfax Weather in January

During January, Fairfax experiences moderate daytime temperatures of 14°C (57°F) and cooler nights around 6°C (43°F). As part of the winter season, expect quite a bit of rainfall. Around 142 mm (5.6 in) is typical.

Rainfall in Fairfax in January

Historically, January sees about 10 days of rain, with a monthly average of 142 mm (5.6 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Fairfax in January

In January, expect moderate temperatures in Fairfax, with highs of 14°C (57°F) and lows of 6°C (43°F) at night. January is part of the winter season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 6°C (43°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Fairfax in January

The city usually sees around 186 hours of sunlight, indicating a moderately sunny period.

For Fairfax itself, April, May, June, July, August, September and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.