Annual mean 14°C · wettest around January · prevailing wind NW
Warmest
23.1 °C
Coldest
13.1 °C
Wettest
30%
Windiest
4.9 m/s
Prevailing
NW
3.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Cupertino over the whole year is 14°C. September is the hottest month, with highs of about 22°C; February is the coldest, with lows of about 8°C. The rainy (wet) season in Cupertino runs from November to April, peaking in January with a 31% chance of rain on a given day. The dry season is May to October; June is the driest month, at 4%. Winds in Cupertino are highest in May, averaging 3.5 m/s (13 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the NW. The clearest skies in Cupertino come in October, when the sky is typically 29% covered; January is the cloudiest month, at 48%.
Month by month Cupertino climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
14°C
8°C
11°C
31%
48%
2.3 m/s
17
0
80
February
15°C
8°C
11°C
29%
38%
2.6 m/s
25
0
77
March
15°C
9°C
12°C
30%
47%
2.9 m/s
28
1
80
April
17°C
10°C
14°C
19%
39%
3.1 m/s
46
3
84
May
19°C
12°C
16°C
14%
41%
3.5 m/s
59
6
83
June
21°C
14°C
19°C
4%
31%
3.5 m/s
71
14
74
July
22°C
15°C
20°C
6%
35%
3.3 m/s
78
18
70
August
22°C
15°C
21°C
7%
37%
3.0 m/s
81
23
65
September
22°C
15°C
21°C
7%
32%
2.7 m/s
79
21
66
October
21°C
12°C
19°C
15%
29%
2.2 m/s
76
13
75
November
17°C
9°C
14°C
21%
33%
1.9 m/s
49
1
87
December
14°C
8°C
11°C
27%
41%
2.0 m/s
17
0
81
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Cupertino weather by season
Year round, Cupertino has days of about 14°C at their warmest in January, its coolest month, and 22°C in September, its warmest; the coolest hours of the day run from 8°C to 15°C through the year, and the average temperature over the year is 14°C around the clock. Rain is most likely around January and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Cupertino weather in winterDecember to February
High 14°CLow 8°CRain 29%
Winter in Cupertino has typical daily highs of about 14°C and lows of about 8°C, with a 29% chance of rain on a given day.
Cupertino weather in springMarch to May
High 17°CLow 10°CRain 21%
Spring in Cupertino has typical daily highs of about 17°C and lows of about 10°C, with a 21% chance of rain on a given day.
Cupertino weather in summerJune to August
High 22°CLow 15°CRain 5%
Summer in Cupertino has typical daily highs of about 22°C and lows of about 15°C, with a 5% chance of rain on a given day.
Cupertino weather in autumnSeptember to November
High 20°CLow 12°CRain 14%
Autumn in Cupertino has typical daily highs of about 20°C and lows of about 12°C, with a 14% chance of rain on a given day.
When is the rainy season in Cupertino?
The rainy (wet) season in Cupertino runs from November to April, peaking in January with a 31% chance of rain on a given day. The dry season is May to October; June is the driest month, at 4%.
What time of year is Cupertino windiest?
Winds in Cupertino are highest in May, averaging 3.5 m/s (13 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the NW.
What is the average temperature in Cupertino year round?
The average temperature in Cupertino over the whole year is 14°C. September is the hottest month, with highs of about 22°C; February is the coldest, with lows of about 8°C.