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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
Climate and monthly weather forecast
Weather in January
January, the same as December, in Cupertino, California, is another mild winter month, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 44.6°F (7°C). With the advent of January, Cupertino experiences an average high-temperature of a still mild 58.5°F (14.7°C), mirroring a close resemblance to the previous month. Weather in January »
Weather in February
The last month of the winter, February, is also a moderate month in Cupertino, California, with an average temperature varying between 44.2°F (6.8°C) and 59.7°F (15.4°C). In February, Cupertino experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderate 59.7°F (15.4°C), closely mirroring the climate in January. Weather in February »
Weather in March
March, the first month of the spring in Cupertino, is an enjoyable month, with temperature in the range of an average high of 61.7°F (16.5°C) and an average low of 44.2°F (6.8°C). The arrival of March brings an average high-temperature of a comfortable 61.7°F (16.5°C), subtly diverging from February's 59.7°F (15.4°C). Weather in March »
Weather in April
April, like March, in Cupertino, California, is another comfortable spring month, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 65.7°F (18.7°C). Cupertino, California, commences April with an average high-temperature of a still refreshing 65.7°F (18.7°C), maintaining a close resemblance to the previous month. Weather in April »
Weather in May
May, the last month of the spring in Cupertino, is a pleasant month, with an average temperature varying between 48.9°F (9.4°C) and 69.3°F (20.7°C). Cupertino transitions into May recording an average high-temperature of an agreeable 69.3°F (20.7°C), closely aligning with the preceding month's temperature. Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Cupertino, California, with an average temperature ranging between max 75.7°F (24.3°C) and min 52.7°F (11.5°C). A gentle upsurge in temperatures occurs as May gives way to June, with average highs shifting from an agreeable 69.3°F (20.7°C) to a moderately hot 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Cupertino, California, with an average temperature ranging between max 79.3°F (26.3°C) and min 55°F (12.8°C). In Cupertino, temperatures reach their average annual highs in July, measuring 79.3°F (26.3°C) and a minimum average of 55°F (12.8°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Cupertino, California, with an average temperature ranging between min 56.1°F (13.4°C) and max 79.2°F (26.2°C). The average high-temperature for August is a still warm 79.2°F (26.2°C), closely aligning with the temperature of the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Cupertino, California, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 77.5°F (25.3°C). Cupertino experiences an average high-temperature of a still moderately hot 77.5°F (25.3°C) in September, subtly different from August's 79.2°F (26.2°C). Weather in September »
Weather in October
October, the same as September, in Cupertino, California, is an agreeable autumn month, with an average temperature ranging between max 71.6°F (22°C) and min 53.8°F (12.1°C). A subtle shift in Cupertino's weather is observed as September turns into October, with the average high temperature reducing from a moderately hot 77.5°F (25.3°C) to a pleasant 71.6°F (22°C). Weather in October »
Weather in November
November, the last month of the autumn in Cupertino, is another comfortable month, with an average temperature varying between 48.4°F (9.1°C) and 63.9°F (17.7°C). November signifies a gentle decline in Cupertino's average high-temperature, easing from an agreeable 71.6°F (22°C) in October to an enjoyable 63.9°F (17.7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a refreshing month in Cupertino, California, with temperature in the range of an average low of 44.4°F (6.9°C) and an average high of 57°F (13.9°C). Cupertino's coldest month, December, registers temperatures that range from a high of 57°F (13.9°C) to a low of 44.4°F (6.9°C). Weather in December »
Updated: Aug 20, 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
How many days does it rain?
Throughout the year, there are 53.6 rainfall days, and 5.39" (137mm) of precipitation is accumulated.
What are the months with the lowest UV index?
The months with the lowest UV index in Cupertino are January, February, November and December, with an average maximum UV index of 3.
What is the rainiest month in Cupertino?
February is the month with the most rainfall. Rain falls for 6 days and accumulates 1.02" (26mm) of precipitation.
What is the most humid month?
With an average relative humidity of 74%, March is the most humid month.
When is Daylight Saving Time (DST) in Cupertino?
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?
With an average of 14h and 42min of daylight, June has the longest days of the year.
When is the highest UV index?
The month with the highest UV index is June, with an average maximum UV index of 6.
What time of the year is the hottest in Cupertino?
July is the warmest month, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 55°F (12.8°C).
What are the least humid months?
July, September and October, with an average relative humidity of 64%, are the least humid months in Cupertino.
What is the driest month?
The months with the least rainfall in Cupertino are July and August Rain falls for 1.3 days and accumulates 0.04" (1mm) of rain.
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 12h of sunshine.
What are the coldest months?
December, marked by an average high-temperature of 57°F (13.9°C) and a low-temperature of 44.4°F (6.9°C), is the coldest month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 36min of daylight.
What is the month with the least sunshine?
With an average of 5.9h of sunshine, December has the least sunshine of the year.
Average temperature
Cupertino, CA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (57°F).
The month with the highest average low temperature is August (56.1°F).
The coldest months (with the lowest average low temperature) are February and March (44.2°F).
Average pressure
Cupertino, 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:
29.98"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
Cupertino, CA
- Average wind speed in January:
4.9mph - Average wind speed in February:
5.8mph - Average wind speed in March:
6mph - Average wind speed in April:
6.2mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.6mph - Average wind speed in October:
4.7mph - Average wind speed in November:
4.8mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).
Average humidity
Cupertino, CA
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July, September and October (64%).
Average rainfall
Cupertino, CA
- Average rainfall in January:
0.98" - Average rainfall in February:
1.02" - Average rainfall in March:
0.91" - Average rainfall in April:
0.31" - Average rainfall in May:
0.28" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.2" - Average rainfall in November:
0.59" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is February (1.02").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Cupertino, CA
- Average rainfall days in January:
7.4 days - Average rainfall days in February:
6 days - Average rainfall days in March:
9 days - Average rainfall days in April:
5.5 days - Average rainfall days in May:
4 days - Average rainfall days in June:
1.3 days
- Average rainfall days in July:
1.3 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
2.5 days - Average rainfall days in October:
3 days - Average rainfall days in November:
4.6 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.8 days).
Average daylight / Average sunshine
Cupertino, 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 3min - 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 5min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days
Cupertino, CA
- Average sunshine days in January:
22 days - Average sunshine days in February:
20.8 days - Average sunshine days in March:
20.8 days - Average sunshine days in April:
24 days - Average sunshine days in May:
24.6 days - Average sunshine days in June:
27.2 days
- Average sunshine days in July:
28.3 days - Average sunshine days in August:
28.5 days - Average sunshine days in September:
26.5 days - Average sunshine days in October:
26.7 days - Average sunshine days in November:
24.2 days - Average sunshine days in December:
21.5 days
The month with the most sunshine days is August (28.5 days).
The months with the least sunshine days are February and March (20.8 days).
Average UV index
Cupertino, CA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Cupertino, CA
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility
Cupertino, 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).