Annual mean 14°C · wettest around March · prevailing wind NW
Warmest
22.8 °C
Coldest
13.0 °C
Wettest
35%
Windiest
5.0 m/s
Prevailing
NW
3.9 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 Los Altos 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 Los Altos runs from November to April, peaking in March with a 36% chance of rain on a given day. The dry season is May to October; June is the driest month, at 7%. Winds in Los Altos are highest in June, averaging 3.6 m/s (13 km/h), and lightest in November, at 2.0 m/s (7 km/h). The prevailing wind is from the NW. The clearest skies in Los Altos come in October, when the sky is typically 30% covered; January is the cloudiest month, at 49%.
Month by month Los Altos 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
36%
49%
2.4 m/s
16
0
79
February
14°C
8°C
11°C
35%
38%
2.7 m/s
24
0
75
March
15°C
9°C
12°C
36%
48%
3.0 m/s
26
0
79
April
17°C
10°C
14°C
26%
40%
3.2 m/s
43
2
83
May
19°C
12°C
16°C
21%
43%
3.5 m/s
56
5
82
June
21°C
14°C
18°C
7%
33%
3.6 m/s
67
14
74
July
21°C
15°C
19°C
12%
38%
3.4 m/s
75
17
71
August
22°C
15°C
21°C
12%
40%
3.1 m/s
80
21
66
September
22°C
14°C
20°C
11%
35%
2.8 m/s
77
19
68
October
21°C
12°C
19°C
21%
30%
2.3 m/s
74
12
76
November
17°C
9°C
14°C
27%
35%
2.0 m/s
46
1
86
December
14°C
8°C
11°C
33%
42%
2.1 m/s
17
0
80
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 Los Altos weather by season
Year round, Los Altos 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 March 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.
Los Altos weather in winterDecember to February
High 14°CLow 8°CRain 35%
Winter in Los Altos has typical daily highs of about 14°C and lows of about 8°C, with a 35% chance of rain on a given day.
Los Altos weather in springMarch to May
High 17°CLow 10°CRain 28%
Spring in Los Altos has typical daily highs of about 17°C and lows of about 10°C, with a 28% chance of rain on a given day.
Los Altos weather in summerJune to August
High 21°CLow 15°CRain 10%
Summer in Los Altos has typical daily highs of about 21°C and lows of about 15°C, with a 10% chance of rain on a given day.
Los Altos weather in autumnSeptember to November
High 20°CLow 12°CRain 20%
Autumn in Los Altos has typical daily highs of about 20°C and lows of about 12°C, with a 20% chance of rain on a given day.
When is the rainy season in Los Altos?
The rainy (wet) season in Los Altos runs from November to April, peaking in March with a 36% chance of rain on a given day. The dry season is May to October; June is the driest month, at 7%.
What time of year is Los Altos windiest?
Winds in Los Altos are highest in June, averaging 3.6 m/s (13 km/h), and lightest in November, at 2.0 m/s (7 km/h). The prevailing wind is from the NW.
What is the average temperature in Los Altos year round?
The average temperature in Los Altos 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.