Annual mean 14°C · wettest around March · prevailing wind NW
Warmest
22.4 °C
Coldest
13.0 °C
Wettest
41%
Windiest
5.1 m/s
Prevailing
NW
4.0 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 Palo Alto 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 Palo Alto runs from October to May, peaking in March with a 43% chance of rain on a given day. The dry season is June to September; June is the driest month, at 10%. Winds in Palo Alto are highest in May, averaging 3.6 m/s (13 km/h), and lightest in November, at 2.1 m/s (8 km/h). The prevailing wind is from the NW. The clearest skies in Palo Alto come in October, when the sky is typically 32% covered; January is the cloudiest month, at 50%.
Month by month Palo Alto 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
42%
50%
2.5 m/s
15
0
77
February
14°C
8°C
11°C
41%
39%
2.8 m/s
23
0
74
March
15°C
9°C
11°C
43%
49%
3.1 m/s
24
0
77
April
17°C
10°C
13°C
34%
42%
3.3 m/s
40
2
82
May
18°C
12°C
15°C
30%
45%
3.6 m/s
51
5
82
June
20°C
14°C
18°C
10%
37%
3.6 m/s
63
12
75
July
21°C
14°C
19°C
19%
42%
3.4 m/s
71
15
73
August
21°C
15°C
20°C
18%
44%
3.1 m/s
78
19
68
September
22°C
14°C
20°C
16%
38%
2.8 m/s
76
18
69
October
21°C
12°C
18°C
29%
32%
2.3 m/s
72
11
77
November
17°C
9°C
14°C
35%
36%
2.1 m/s
44
1
85
December
14°C
8°C
11°C
40%
43%
2.2 m/s
16
0
79
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 Palo Alto weather by season
Year round, Palo Alto 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.
Palo Alto weather in winterDecember to February
High 14°CLow 8°CRain 41%
Winter in Palo Alto has typical daily highs of about 14°C and lows of about 8°C, with a 41% chance of rain on a given day.
Palo Alto weather in springMarch to May
High 17°CLow 10°CRain 35%
Spring in Palo Alto has typical daily highs of about 17°C and lows of about 10°C, with a 35% chance of rain on a given day.
Palo Alto weather in summerJune to August
High 21°CLow 14°CRain 15%
Summer in Palo Alto has typical daily highs of about 21°C and lows of about 14°C, with a 15% chance of rain on a given day.
Palo Alto weather in autumnSeptember to November
High 20°CLow 12°CRain 26%
Autumn in Palo Alto has typical daily highs of about 20°C and lows of about 12°C, with a 26% chance of rain on a given day.
When is the rainy season in Palo Alto?
The rainy (wet) season in Palo Alto runs from October to May, peaking in March with a 43% chance of rain on a given day. The dry season is June to September; June is the driest month, at 10%.
What time of year is Palo Alto windiest?
Winds in Palo Alto are highest in May, averaging 3.6 m/s (13 km/h), and lightest in November, at 2.1 m/s (8 km/h). The prevailing wind is from the NW.
What is the average temperature in Palo Alto year round?
The average temperature in Palo Alto 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.