Climate and monthly weather forecastFairfax, SC
Climate and monthly weather forecast
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
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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.
With an average relative humidity of 70%, January is the least humid month.
Throughout the year, there are 152.9 rainfall days, and 31.18" (792mm) of precipitation is accumulated.
January and February are months with snowfall.
Throughout the year, there are 0.6 snowfall days, and 0.16" (4mm) of snow is accumulated.
January and December, with an average maximum UV index of 3, are months with the lowest UV index in Fairfax.
February is the month with the most snowfall. Snow falls for 0.3 days and accumulates 0.12" (3mm) of snow.
In Fairfax, snow does not fall in March through December.
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.
The month with the longest days is June, with an average of 14h and 18min of daylight.
June through August, with an average maximum UV index of 7, are months with the highest UV index in Fairfax.
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).
July has the most sunshine of the year, with an average of 10.8h of sunshine.
The months with the highest humidity are August and December, with an average relative humidity of 76%.
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.
November is the month with the least rainfall. Rain falls for 6.6 days and accumulates 1.38" (35mm) of precipitation.
With an average of 10h and 0min of daylight, December has the shortest days of the year.
December has the least sunshine of the year in Fairfax, with an average of 5.3h of sunshine.
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 in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
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 in January:
7mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5.9mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.5mph - Average wind speed in December:
6.6mph
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
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 in January:
1.89" - Average rainfall in February:
2.68" - Average rainfall in March:
2.52" - Average rainfall in April:
2.87" - Average rainfall in May:
2.8" - Average rainfall in June:
2.76"
- Average rainfall in July:
3.03" - Average rainfall in August:
3.7" - Average rainfall in September:
1.97" - Average rainfall in October:
2.17" - Average rainfall in November:
1.38" - Average rainfall in December:
3.43"
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 in January:
9 days - Average rainfall days in February:
9.8 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
14.6 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
20 days - Average rainfall days in August:
20.8 days - Average rainfall days in September:
13.9 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
9.6 days
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
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 in January:
0.3 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
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 in January:
10h and 18min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 18min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 0min
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).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
6h and 42min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 12min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 24min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 18min
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 in January:
21 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
17.3 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
9 days - Average sunshine days in August:
7.3 days - Average sunshine days in September:
14.3 days - Average sunshine days in October:
21 days - Average sunshine days in November:
22.3 days - Average sunshine days in December:
19.5 days
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
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 cloud cover
Fairfax, SC
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 29).
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).
