Climate and monthly weather forecastFairfax, CA
Climate and monthly weather forecast
Weather in January
January is a moderate winter month in Fairfax, California, with an average temperature varying between 46.6°F (8.1°C) and 55.9°F (13.3°C). In January, Fairfax experiences a minor shift in meteorological conditions with average high-temperatures marked at a refreshing 55.9°F (13.3°C), closely mirroring the climate in December. Weather in January »Weather in February
February, the last month of the winter in Fairfax, is another refreshing month, with an average temperature ranging between min 46.8°F (8.2°C) and max 57.4°F (14.1°C). The arrival of February sees an average high-temperature of a still refreshing 57.4°F (14.1°C), hardly diverging from January's 55.9°F (13.3°C). Weather in February »Weather in March
March, the first month of the spring in Fairfax, is still a mild month, with an average temperature ranging between max 59.2°F (15.1°C) and min 47.8°F (8.8°C). Fairfax experiences a recorded average high-temperature of a still moderate 59.2°F (15.1°C) in March, closely aligned with February's 57.4°F (14.1°C). Weather in March »Weather in April
April is a comfortable spring month in Fairfax, California, with an average temperature fluctuating between 48.7°F (9.3°C) and 61.7°F (16.5°C). The commencement of April notes an average high-temperature of an enjoyable 61.7°F (16.5°C), exhibiting little difference from the previous month. Weather in April »Weather in May
The last month of the spring, May, is another comfortable month in Fairfax, California, with an average temperature fluctuating between 50.7°F (10.4°C) and 63.3°F (17.4°C). Fairfax registers an average high-temperature of a still refreshing 63.3°F (17.4°C) at the commencement of May, closely related to the preceding month. Weather in May »Weather in June
June, the first month of the summer in Fairfax, is also an enjoyable month, with an average temperature ranging between min 53.8°F (12.1°C) and max 67.8°F (19.9°C). June's arrival brings an average high-temperature of a still refreshing 67.8°F (19.9°C), demonstrating subtle variation from the preceding month. Weather in June »Weather in July
July is an agreeable summer month in Fairfax, California, with an average temperature ranging between max 68.5°F (20.3°C) and min 54.9°F (12.7°C). The unfolding of July shows an average high-temperature of a pleasant 68.5°F (20.3°C), indicating a slight variance from June's 67.8°F (19.9°C). Weather in July »Weather in August
The last month of the summer, August, is also an agreeable month in Fairfax, California, with an average temperature ranging between max 69.4°F (20.8°C) and min 56.1°F (13.4°C). Fairfax's weather in August indicates an average high-temperature of a still agreeable 69.4°F (20.8°C), nearly consistent with the 68.5°F (20.3°C) of July. Weather in August »Weather in September
September, the first month of the autumn in Fairfax, is also an agreeable month, with an average temperature ranging between max 70.9°F (21.6°C) and min 56.3°F (13.5°C). September temperatures tend to peak at an average high of 70.9°F (21.6°C) and dip to a low of 56.3°F (13.5°C). Weather in September »Weather in October
October, like September, in Fairfax, California, is another comfortable autumn month, with an average temperature ranging between min 54.7°F (12.6°C) and max 67.5°F (19.7°C). With the transition into October, Fairfax notes an average high-temperature of an enjoyable 67.5°F (19.7°C), closely resembling September. Weather in October »Weather in November
The last month of the autumn, November, is another refreshing month in Fairfax, California, with temperature in the range of an average high of 61.2°F (16.2°C) and an average low of 50.2°F (10.1°C). November implies a soft temperature shift, with average high-temperatures reducing from October's 67.5°F (19.7°C) to a still refreshing 61.2°F (16.2°C). Weather in November »Weather in December
The first month of the winter, December, is also a fresh month in Fairfax, California, with an average temperature fluctuating between 46°F (7.8°C) and 55.2°F (12.9°C). Fairfax experiences its lowest temperatures in December, with an average peak of 55.2°F (12.9°C) and a low of 46°F (7.8°C). Weather in December »Updated: Jul 24, 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
Throughout the year, there are 80.3 rainfall days, and 15.98" (406mm) of precipitation is accumulated.
In Fairfax, snow does not fall in January through November.
Throughout the year, there are 0.1 snowfall days.
The month with the most rainfall in Fairfax is February, when the rain falls for 8.9 days and typically aggregates up to 3.43" (87mm) of precipitation.
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The month with the longest days is June, with an average of 14h and 48min of daylight.
June through September, with an average maximum UV index of 5, are months with the highest UV index in Fairfax.
The months with the least rainfall are July and August Rain falls for 2.3 days and accumulates 0.08" (2mm) of rain.
The month with the most sunshine is July, with an average of 11.2h of sunshine.
The most humid month is August, with an average relative humidity of 78%.
The highest temperatures are recorded in September, with averages reaching a high of 70.9°F (21.6°C) and a low of 56.3°F (13.5°C).
With an average relative humidity of 69%, October is the least humid month.
Temperature readings reach their annual highs in December, averaging 55.2°F (12.9°C) and a minimum average of 46°F (7.8°C).
December is the only month when snow falls.
December has the most snowfall days of the year. Snow falls for 0.1 days.
With an average of 9h and 36min of daylight, December has the shortest days of the year.
With an average of 5.6h of sunshine, December has the least sunshine of the year.
Average temperature
Fairfax, CA
The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).
Average pressure
Fairfax, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed
Fairfax, CA
- Average wind speed in January:
6.5mph - Average wind speed in February:
7.5mph - Average wind speed in March:
7.8mph - Average wind speed in April:
8.3mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.5mph - Average wind speed in September:
6.3mph - Average wind speed in October:
6mph - Average wind speed in November:
5.9mph - Average wind speed in December:
6.7mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).
Average humidity
Fairfax, CA
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall
Fairfax, CA
- Average rainfall in January:
2.64" - Average rainfall in February:
3.43" - Average rainfall in March:
2.56" - Average rainfall in April:
0.79" - Average rainfall in May:
0.71" - Average rainfall in June:
0.2"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.08" - Average rainfall in September:
0.12" - Average rainfall in October:
0.83" - Average rainfall in November:
1.73" - Average rainfall in December:
2.83"
The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days
Fairfax, CA
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
8.9 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
7.8 days - Average rainfall days in May:
5.7 days - Average rainfall days in June:
2.7 days
- Average rainfall days in July:
2.3 days - Average rainfall days in August:
2.7 days - Average rainfall days in September:
3.4 days - Average rainfall days in October:
5 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
10.9 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall days
Fairfax, CA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0 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:
0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Fairfax, CA
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
5h and 42min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 30min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 0min - Average sunshine in June:
11h and 6min
- Average sunshine in July:
11h and 12min - Average sunshine in August:
10h and 54min - Average sunshine in September:
10h and 30min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 24min - Average sunshine in December:
5h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days
Fairfax, CA
- Average sunshine days in January:
20.1 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
16.6 days - Average sunshine days in April:
20.5 days - Average sunshine days in May:
22.8 days - Average sunshine days in June:
24.8 days
- Average sunshine days in July:
24.8 days - Average sunshine days in August:
23.4 days - Average sunshine days in September:
24.1 days - Average sunshine days in October:
24 days - Average sunshine days in November:
21.4 days - Average sunshine days in December:
18.7 days
The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).
Average UV index
Fairfax, CA
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover
Fairfax, CA
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility
Fairfax, CA
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).
