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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Atherton, California, is another refreshing winter month, with an average temperature ranging between max 56.8°F (13.8°C) and min 46.4°F (8°C). As Atherton transitions into January, the average high-temperature stands at a still moderate 56.8°F (13.8°C), offering little variation from the preceding month. Weather in January »
Weather in February
The last month of the winter, February, is another refreshing month in Atherton, California, with an average temperature fluctuating between 46°F (7.8°C) and 58.1°F (14.5°C). As February takes hold, the average high-temperature is a still moderate 58.1°F (14.5°C), nearly mirroring that of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Atherton, is still a mild month, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 46.9°F (8.3°C). As Atherton steps into March, the average high-temperature holds at a still mild 59.9°F (15.5°C), hinting at a minor fluctuation from the prior month. Weather in March »
Weather in April
April in Atherton, California, is an enjoyable spring month, with an average temperature fluctuating between 62.8°F (17.1°C) and 48.2°F (9°C). The onset of April brings an average high-temperature of an enjoyable 62.8°F (17.1°C), nearly matching the March temperature. Weather in April »
Weather in May
May, the last month of the spring in Atherton, is another comfortable month, with an average temperature ranging between max 65.3°F (18.5°C) and min 50.2°F (10.1°C). May's onset brings an average high-temperature of a still enjoyable 65.3°F (18.5°C), showing a minute difference from April's 62.8°F (17.1°C). Weather in May »
Weather in June
June, the first month of the summer in Atherton, is a pleasant month, with an average temperature ranging between min 53.2°F (11.8°C) and max 70.3°F (21.3°C). The onset of June manifests an average high-temperature of an agreeable 70.3°F (21.3°C), demonstrating a minor variation from the preceding month. Weather in June »
Weather in July
July, like June, is another pleasant summer month in Atherton, California, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 73°F (22.8°C). Peak temperatures are observed in July and August, averaging a high-temperature of 73°F (22.8°C). Weather in July »
Weather in August
August, the last month of the summer in Atherton, is another pleasant month, with an average temperature fluctuating between 73°F (22.8°C) and 56.1°F (13.4°C). July and August, with an average high-temperature of 73°F (22.8°C), are marked as the warmest months. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Atherton, California, with an average temperature fluctuating between 56.7°F (13.7°C) and 72.7°F (22.6°C). Atherton's average high-temperature in September sits at a still pleasant 72.7°F (22.6°C), showing little difference from the previous month. Weather in September »
Weather in October
October, the same as September, in Atherton, California, is an agreeable autumn month, with an average temperature fluctuating between 68.5°F (20.3°C) and 55°F (12.8°C). October's advent notes a subtle adjustment in average high-temperature to a still agreeable 68.5°F (20.3°C) from September. Weather in October »
Weather in November
November, the last month of the autumn in Atherton, is another refreshing month, with an average temperature fluctuating between 50.7°F (10.4°C) and 61.9°F (16.6°C). The arrival of November is marked by a minor reduction in average high-temperature, sliding from a pleasant 68.5°F (20.3°C) in October to a refreshing 61.9°F (16.6°C). Weather in November »
Weather in December
The first month of the winter, December, is still a mild month in Atherton, California, with an average temperature fluctuating between 55.9°F (13.3°C) and 46.6°F (8.1°C). The coldest time of the year is December, with temperatures averaging a high of 55.9°F (13.3°C) and a low of 46.6°F (8.1°C). Weather in December »
[Resources]Frequently asked questions
How many days does it rain in Atherton?
Throughout the year, in Atherton, there are 73.4 rainfall days, and 11.89" (302mm) of precipitation is accumulated.
What is the wettest month in Atherton?
February is the month with the most rainfall in Atherton. Rain falls for 8.8 days and accumulates 2.36" (60mm) of precipitation.
What is the most humid month in Atherton?
The most humid month in Atherton is March, with an average relative humidity of 75%.
When is Daylight Saving Time (DST) in Atherton?
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.
When are the longest days in Atherton?
The month with the longest days is June, with an average of 14h and 42min of daylight.
What is the month with the highest UV index in Atherton?
June through September, with an average maximum UV index of 5, are months with the highest UV index in Atherton.
What month is the hottest in Atherton?
July and August in Atherton are characterised by peak temperatures, with an average high of 73°F (22.8°C).
What is the driest month in Atherton?
The months with the least rainfall in Atherton are July and August Rain falls for 1.5 days and accumulates 0.04" (1mm) of rain.
What month has the most sunshine in Atherton?
July has the most sunshine of the year in Atherton, California, with an average of 12h of sunshine.
What is the least humid month in Atherton?
The least humid month in Atherton, California, is October, with an average relative humidity of 68%.
What are the months with the lowest UV index in Atherton?
The months with the lowest UV index in Atherton, California, are November and December, with an average maximum UV index of 3.
What part of the year is the coldest in Atherton?
Temperature records in Atherton mark December as the coldest month, with highs averaging 55.9°F (13.3°C) and lows at 46.6°F (8.1°C).
What is the month with the shortest days in Atherton?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
What is the month with the least sunshine in Atherton?
The month with the least sunshine is December, with an average of 5.8h of sunshine.
Average temperature
Atherton, CA
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is December (55.9°F).
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure
Atherton, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed
Atherton, CA
- Average wind speed in January:
5.8mph - Average wind speed in February:
6.9mph - Average wind speed in March:
7.2mph - Average wind speed in April:
7.5mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5.5mph - Average wind speed in November:
5.7mph - Average wind speed in December:
6.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.5mph).
Average humidity
Atherton, CA
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Atherton, CA
- Average rainfall in January:
1.93" - Average rainfall in February:
2.36" - Average rainfall in March:
2.05" - Average rainfall in April:
0.67" - Average rainfall in May:
0.59" - Average rainfall in June:
0.12"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.12" - Average rainfall in October:
0.55" - Average rainfall in November:
1.38" - Average rainfall in December:
2.05"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Atherton, CA
- Average rainfall days in January:
10.1 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
7.8 days - Average rainfall days in May:
5.3 days - Average rainfall days in June:
1.8 days
- Average rainfall days in July:
1.5 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
2.4 days - Average rainfall days in October:
5 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
10.2 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (0.8 days).
Average daylight / Average sunshine
Atherton, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
6h and 2min - Average sunshine in March:
7h and 5min - Average sunshine in April:
10h and 2min - Average sunshine in May:
10h and 4min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 5min - Average sunshine in September:
11h and 0min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days
Atherton, CA
- Average sunshine days in January:
19.8 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
17.5 days - Average sunshine days in April:
21.3 days - Average sunshine days in May:
23.2 days - Average sunshine days in June:
26.3 days
- Average sunshine days in July:
27.5 days - Average sunshine days in August:
27.6 days - Average sunshine days in September:
26.4 days - Average sunshine days in October:
24.4 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
19.3 days
The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is March (17.5 days).
Average UV index
Atherton, 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 November and December (UV index 3).
Average cloud cover
Atherton, CA
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility
Atherton, 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).
Atherton, California, USA
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