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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
Palm trees and the iconic Hoover Tower within Stanford University in Palo Alto, California
Weather in January
January, the same as December, in Palo Alto, California, is another refreshing winter month, with an average temperature varying between 45.1°F (7.3°C) and 57.6°F (14.2°C). The ushering in of January brings an average high-temperature of a still refreshing 57.6°F (14.2°C), closely mirroring the 56.3°F (13.5°C) of December. Weather in January »
Weather in February
The last month of the winter, February, is another refreshing month in Palo Alto, California, with an average temperature varying between 45.1°F (7.3°C) and 59.5°F (15.3°C). Palo Alto, California, marks the start of February with an average high-temperature of a still mild 59.5°F (15.3°C), hinting at a slight fluctuation from January's 57.6°F (14.2°C). Weather in February »
Weather in March
March, the first month of the spring in Palo Alto, is a refreshing month, with an average temperature fluctuating between 61.3°F (16.3°C) and 45.7°F (7.6°C). With the onset of March, a modest change to a comfortable 61.3°F (16.3°C) from February's 59.5°F (15.3°C) is noted in high-temperature. Weather in March »
Weather in April
April, the same as March, is another enjoyable spring month in Palo Alto, California, with an average temperature ranging between min 47.1°F (8.4°C) and max 64.9°F (18.3°C). The average high-temperature during April registers at a still comfortable 64.9°F (18.3°C), closely corresponding to the preceding month. Weather in April »
Weather in May
May, the last month of the spring in Palo Alto, is a pleasant month, with an average temperature ranging between min 49.6°F (9.8°C) and max 68.2°F (20.1°C). Entering May, the average high-temperature is recorded at a pleasant 68.2°F (20.1°C), exhibiting a minimal shift from April's 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Palo Alto, California, with an average temperature varying between 53.8°F (12.1°C) and 74.8°F (23.8°C). With the onset of June, Palo Alto's average high-temperature experiences a slight rise, moving from May's agreeable 68.2°F (20.1°C) to a moderately hot 74.8°F (23.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Palo Alto, California, with an average temperature ranging between min 55.4°F (13°C) and max 77.5°F (25.3°C). July and August, with an average high-temperature of 77.5°F (25.3°C), are the warmest months. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Palo Alto, California, with an average temperature fluctuating between 77.5°F (25.3°C) and 57°F (13.9°C). In Palo Alto, the months of July and August register the highest average temperatures, peaking at 77.5°F (25.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Palo Alto, is also a moderately hot month, with an average temperature ranging between max 76.5°F (24.7°C) and min 56.7°F (13.7°C). The average high-temperature for September is a still moderately hot 76.5°F (24.7°C), closely aligning with the temperature of the preceding month. Weather in September »
Weather in October
October, the same as September, in Palo Alto, California, is an agreeable autumn month, with an average temperature fluctuating between 54.5°F (12.5°C) and 70.3°F (21.3°C). The onset of October entails a subtle temperature shift, as the average high-temperature eases from a warm 76.5°F (24.7°C) in September to an agreeable 70.3°F (21.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an enjoyable month in Palo Alto, California, with an average temperature ranging between max 62.8°F (17.1°C) and min 49.3°F (9.6°C). Palo Alto observes a small decrease in the average high-temperature with the arrival of November, falling from October's pleasant 70.3°F (21.3°C) to a refreshing 62.8°F (17.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a mild month in Palo Alto, California, with an average temperature varying between 45.5°F (7.5°C) and 56.3°F (13.5°C). With its high average temperature of 56.3°F (13.5°C) and a low of 45.5°F (7.5°C), December is regarded as the coldest month. Weather in December »
[Resources]Frequently asked questions
How many days does it rain in Palo Alto?
Throughout the year, there are 63.3 rainfall days, and 9.53" (242mm) of precipitation is accumulated.
What is the wettest month in Palo Alto?
The month with the most rainfall is February, when the rain falls for 7.8 days and typically aggregates up to 2.01" (51mm) of precipitation.
What is the month with the lowest UV index in Palo Alto?
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Palo Alto.
What is the most humid month in Palo Alto?
March is the most humid month, with an average relative humidity of 74%.
When is Daylight Saving Time (DST) in Palo Alto?
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 is the highest UV index in Palo Alto?
April through October, with an average maximum UV index of 5, are months with the highest UV index.
When are the longest days in Palo Alto?
June has the longest days of the year, with an average of 14h and 42min of daylight.
What time of the year is the hottest in Palo Alto?
In Palo Alto, the warmest months are July and August, registering an average high-temperature of 77.5°F (25.3°C).
What is the driest month in Palo Alto?
July is the only month when rain does not fall in Palo Alto.
What month has the most sunshine in Palo Alto?
The month with the most sunshine in Palo Alto, California, is July, with an average of 12.1h of sunshine.
When does it rain in Palo Alto?
January through June, August through December are months with rainfall in Palo Alto, California.
What are the least humid months in Palo Alto?
September and October, with an average relative humidity of 65%, are the least humid months.
What month is the coldest in Palo Alto?
In Palo Alto, December is the coldest month, with temperatures averaging a high of 56.3°F (13.5°C) and a low of 45.5°F (7.5°C).
What is the month with the shortest days in Palo Alto?
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 Palo Alto?
December has the least sunshine of the year, with an average of 5.9h of sunshine.
Average temperature
Palo Alto, CA
The warmest months (with the highest average high temperature) are July and August (77.5°F).
The month with the lowest average high temperature is December (56.3°F).
The month with the highest average low temperature is August (57°F).
The coldest months (with the lowest average low temperature) are January and February (45.1°F).
Average pressure
Palo Alto, 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:
29.92"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 months with the lowest atmospheric pressure are June and September (29.92"Hg).
Average wind speed
Palo Alto, CA
- Average wind speed in January:
5.2mph - Average wind speed in February:
6.1mph - Average wind speed in March:
6.3mph - Average wind speed in April:
6.5mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6.1mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
4.9mph - Average wind speed in October:
4.9mph - Average wind speed in November:
5mph - Average wind speed in December:
5.7mph
The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.9mph).
Average humidity
Palo Alto, CA
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall
Palo Alto, CA
- Average rainfall in January:
1.61" - Average rainfall in February:
2.01" - Average rainfall in March:
1.73" - Average rainfall in April:
0.59" - Average rainfall in May:
0.47" - Average rainfall in June:
0.04"
The wettest month (with the highest rainfall) is February (2.01").
The driest month (with the least rainfall) is July (0").
Average rainfall days
Palo Alto, CA
- Average rainfall days in January:
9.3 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
7.3 days - Average rainfall days in May:
4.4 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
0.8 days - Average rainfall days in August:
0.6 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
3.5 days - Average rainfall days in November:
5.4 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.6 days).
Average daylight / Average sunshine
Palo Alto, 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 2min - 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 5min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - 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 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days
Palo Alto, CA
- Average sunshine days in January:
21.3 days - Average sunshine days in February:
19.4 days - Average sunshine days in March:
18 days - Average sunshine days in April:
22.3 days - Average sunshine days in May:
25.8 days - Average sunshine days in June:
28.4 days
- Average sunshine days in July:
30.2 days - Average sunshine days in August:
29.5 days - Average sunshine days in September:
27.6 days - Average sunshine days in October:
26.5 days - Average sunshine days in November:
23.8 days - Average sunshine days in December:
21.7 days
The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (18 days).
Average UV index
Palo Alto, CA
The months with the highest UV index are April, May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover
Palo Alto, CA
The months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility
Palo Alto, 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).
Palo Alto, California, USA
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