Annual mean 14°C · wettest around January · prevailing wind W
Warmest
25.5 °C
Coldest
13.1 °C
Wettest
69%
Windiest
4.7 m/s
Prevailing
W
3.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Gilroy over the whole year is 14°C. August is the hottest month, with highs of about 24°C; February is the coldest, with lows of about 6°C. The rainy (wet) season in Gilroy runs from October to May, peaking in January with a 69% chance of rain on a given day. The dry season is June to September; July is the driest month, at 7%. Winds in Gilroy are highest in June, averaging 3.2 m/s (12 km/h), and lightest in November, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Gilroy come in October, when the sky is typically 24% covered; March is the cloudiest month, at 42%.
Month by month Gilroy 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
7°C
11°C
69%
40%
1.9 m/s
21
0
79
February
15°C
6°C
12°C
68%
33%
2.2 m/s
28
0
75
March
16°C
7°C
13°C
61%
42%
2.4 m/s
33
1
78
April
18°C
9°C
15°C
48%
35%
2.6 m/s
49
5
80
May
20°C
11°C
17°C
50%
36%
3.0 m/s
59
9
77
June
23°C
13°C
20°C
17%
26%
3.2 m/s
67
22
63
July
24°C
14°C
22°C
7%
29%
3.0 m/s
69
31
55
August
24°C
14°C
22°C
12%
29%
2.7 m/s
70
36
50
September
24°C
13°C
22°C
15%
27%
2.4 m/s
70
30
54
October
23°C
10°C
20°C
50%
24%
1.9 m/s
72
21
65
November
18°C
7°C
15°C
53%
28%
1.7 m/s
55
3
83
December
14°C
6°C
11°C
56%
35%
1.8 m/s
20
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 Gilroy weather by season
Year round, Gilroy has days of about 14°C at their warmest in January, its coolest month, and 24°C in August, its warmest; the coolest hours of the day run from 6°C to 14°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 July. 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.
Gilroy weather in winterDecember to February
High 14°CLow 6°CRain 65%
Winter in Gilroy has typical daily highs of about 14°C and lows of about 6°C, with a 65% chance of rain on a given day.
Gilroy weather in springMarch to May
High 18°CLow 9°CRain 53%
Spring in Gilroy has typical daily highs of about 18°C and lows of about 9°C, with a 53% chance of rain on a given day.
Gilroy weather in summerJune to August
High 24°CLow 14°CRain 12%
Summer in Gilroy has typical daily highs of about 24°C and lows of about 14°C, with a 12% chance of rain on a given day.
Gilroy weather in autumnSeptember to November
High 22°CLow 10°CRain 39%
Autumn in Gilroy has typical daily highs of about 22°C and lows of about 10°C, with a 39% chance of rain on a given day.
When is the rainy season in Gilroy?
The rainy (wet) season in Gilroy runs from October to May, peaking in January with a 69% chance of rain on a given day. The dry season is June to September; July is the driest month, at 7%.
What time of year is Gilroy windiest?
Winds in Gilroy are highest in June, averaging 3.2 m/s (12 km/h), and lightest in November, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Gilroy year round?
The average temperature in Gilroy over the whole year is 14°C. August is the hottest month, with highs of about 24°C; February is the coldest, with lows of about 6°C.