Fairfax Weather and Climate: A Comprehensive Guide
The climate in Fairfax is marked by big temperature swings throughout the year.
Temperatures range from very warm during the warmest months
to cold in the cooler months.
It is also known for its large amounts of rain/snowfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
In Fairfax, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very warm 30°C in July to a chilly 6°C in the coolest month, January.
Nights are cooler, with lows often dropping to around -4°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Fairfax experiences significant rain/snowfall throughout the year, averaging 1164 mm of precipitation annually. Fairfax offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between June (138 mm) and February (65 mm) is not too significant, making the climate enjoyable for visitors and residents alike.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Fairfax serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 9.4 hours of sunshine daily, and embrace the darker days in December, offering only 4.3 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Fairfax.
The city experiences its highest humidity in August, reaching 69%. In March, the humidity drops to its lowest level at 58%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 4 m/s and 5 m/s throughout the year. It is lowest in May, June, July, August, September, October, November and December and highest during January, February, March and April.
The mean monthly wind speed over the year (meters per second)
broken clouds and no rain overcast and heavy rain broken clouds and rainForecast for Fairfax
3 m/s
3 m/s
8 m/s
The best time of year to visit Fairfax in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 30°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 6°C.
June tops the wettest month list with 138 mm of rainfall.
February is the driest month with 65 mm of precipitation.
June is the sunniest month with an average of 282 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
