Climate and monthly weather forecast
Fairfax, SC

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Weather in January

January, the same as December, in Fairfax, South Carolina, is another mild winter month, with an average temperature ranging between min 39.9°F (4.4°C) and max 55.4°F (13°C). In Fairfax, the lowest average temperatures are observed in January, with a high of 55.4°F (13°C) and a low of 39.9°F (4.4°C). Weather in January »

Weather in February

The last month of the winter, February, is another mild month in Fairfax, South Carolina, with an average temperature fluctuating between 60.1°F (15.6°C) and 43.2°F (6.2°C). The transition into February marks the average high-temperature at a still moderate 60.1°F (15.6°C), differing minimally from January's 55.4°F (13°C). Weather in February »

Weather in March

The first month of the spring, March, is a refreshing month in Fairfax, South Carolina, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 48.7°F (9.3°C). March's arrival signals a subtle increase in average high-temperatures, moving from February's refreshing 60.1°F (15.6°C) to a comfortable 66.6°F (19.2°C). Weather in March »

Weather in April

April in Fairfax, South Carolina, is a warm spring month, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 75°F (23.9°C). April introduces a minor temperature shift, with average high-temperatures adjusting from March's refreshing 66.6°F (19.2°C) to a moderately hot 75°F (23.9°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderately hot month in Fairfax, South Carolina, with an average temperature ranging between min 64°F (17.8°C) and max 81.7°F (27.6°C). Observing a minor shift, the average high-temperature during May adjusts from April's 75°F (23.9°C) to a still moderately hot 81.7°F (27.6°C). Weather in May »

Weather in June

June, the first month of the summer in Fairfax, is a tropical month, with an average temperature ranging between min 71.1°F (21.7°C) and max 88.3°F (31.3°C). June's arrival brings a slight change in high-temperatures, adjusting from a moderately hot 81.7°F (27.6°C) in May to a hot 88.3°F (31.3°C). Weather in June »

Weather in July

July, like June, is another tropical summer month in Fairfax, South Carolina, with temperature in the range of an average low of 73.2°F (22.9°C) and an average high of 91°F (32.8°C). The highest temperatures are recorded in July, with averages reaching a high of 91°F (32.8°C) and a low of 73.2°F (22.9°C). In July, the heat index is evaluated at a burning hot 113°F (45°C). Weather in July »

Weather in August

August, the last month of the summer in Fairfax, is another tropical month, with an average temperature ranging between min 72.9°F (22.7°C) and max 89.8°F (32.1°C). Upon the onset of August, Fairfax witnesses an average high-temperature of a still hot 89.8°F (32.1°C), showing a close resemblance to the prior month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Fairfax, South Carolina, with an average temperature varying between 84.9°F (29.4°C) and 68.2°F (20.1°C). September's onset sees an average high-temperature of a warm 84.9°F (29.4°C), exhibiting a slight fluctuation from the previous month. Weather in September »

Weather in October

October, like September, in Fairfax, South Carolina, is another warm autumn month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 58.1°F (14.5°C). October's onset brings a reduction in the average high-temperature, from a moderately hot 84.9°F (29.4°C) in September to a still warm 75°F (23.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Fairfax, is another comfortable month, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 64.6°F (18.1°C). A moderate decline in the average high-temperature is seen during November, decreasing from a moderately hot 75°F (23.9°C) in October to a refreshing 64.6°F (18.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a refreshing month in Fairfax, South Carolina, with an average temperature fluctuating between 44.1°F (6.7°C) and 58.6°F (14.8°C). The arrival of December corresponds with a light shift in temperature, down from a comfortable 64.6°F (18.1°C) in November to a still refreshing 58.6°F (14.8°C). Weather in December »
Updated: Jun 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

The month of January, characterized by an average high of 55.4°F (13°C) and a low of 39.9°F (4.4°C), is recognized as the coldest in Fairfax.

What is the least humid month?

With an average relative humidity of 70%, January is the least humid month.

How many days does it rain?

Throughout the year, there are 152.9 rainfall days, and 31.18" (792mm) of precipitation is accumulated.

When does it snow?

January and February are months with snowfall.

How many days does it snow in Fairfax?

Throughout the year, there are 0.6 snowfall days, and 0.16" (4mm) of snow is accumulated.

When is the lowest UV index?

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Fairfax.

What is the snowiest month?

February is the month with the most snowfall. Snow falls for 0.3 days and accumulates 0.12" (3mm) of snow.

When it does not snow?

In Fairfax, snow does not fall in March through December.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When are the longest days?

The month with the longest days is June, with an average of 14h and 18min of daylight.

What are the months with the highest UV index?

June through August, with an average maximum UV index of 7, are months with the highest UV index in Fairfax.

What is the hottest time of year?

During the warmest month in Fairfax, July, temperatures average a high of 91°F (32.8°C) and a low of 73.2°F (22.9°C).

What month has the most sunshine?

July has the most sunshine of the year, with an average of 10.8h of sunshine.

What is the most humid month?

The months with the highest humidity are August and December, with an average relative humidity of 76%.

What is the wettest month?

The month with the most rainfall in Fairfax is August, when the rain falls for 20.8 days and typically aggregates up to 3.7" (94mm) of precipitation.

What is the driest month?

November is the month with the least rainfall. Rain falls for 6.6 days and accumulates 1.38" (35mm) of precipitation.

What is the month with the shortest days?

With an average of 10h and 0min of daylight, December has the shortest days of the year.

What is the month with the least sunshine?

December has the least sunshine of the year in Fairfax, with an average of 5.3h of sunshine.

Average temperature
Fairfax, SC

Average temperature - Fairfax, SC

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (55.4°F).

The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).

Average pressure
Fairfax, SC

Average pressure - Fairfax, SC

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed
Fairfax, SC

Average wind speed - Fairfax, SC

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity
Fairfax, SC

Average humidity - Fairfax, SC

The months with the highest relative humidity are August and December (76%).
The month with the lowest relative humidity is January (70%).

Average rainfall
Fairfax, SC

Average rainfall - Fairfax, SC

The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is November (1.38").

Average rainfall days
Fairfax, SC

Average rainfall days - Fairfax, SC

The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is November (6.6 days).

Average snowfall
Fairfax, SC

Average snowfall - Fairfax, SC

The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days
Fairfax, SC

Average snowfall days - Fairfax, SC

The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight / Average sunshine
Fairfax, SC

Average daylight / Average sunshine - Fairfax, SC

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days
Fairfax, SC

Average sunshine days - Fairfax, SC

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is August (7.3 days).

Average UV index
Fairfax, SC

Average UV index - Fairfax, SC

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

Average visibility
Fairfax, SC

Average visibility - Fairfax, SC

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Fairfax, South Carolina, USA

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