Gilroy weather in October

In October, Gilroy sees average daytime highs of 73°F and overnight lows near 51°F, with 0.7 in of rain across 1.9 wet days and about 11 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 69°F by the end. The sky is clear or mostly clear about 70% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 30 min by month's end. Set against the rest of the year, October is Gilroy's 5th-clearest and 12th-windiest month. For the whole year in context, see Gilroy's year-round climate.

Daytime high
73°
5th warmest
Overnight low
51°
8th coldest
Rainfall
0.7 in
1.9 wet days
Daylight
11 hours
6:20 AM – 5:22 PM
Cloud cover
27%
5th clearest
Wind
3 mph
12th windiest
Solar energy
4.4 kWh/m²
Travel score
8.7
out of 10

Gilroy is city in Santa Clara County, California, United States.

Density
1,272/km²
people per km²
Founded
1870

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 76°F in the first days to 69°F by the end.

A typical October day in Gilroy reaches about 73°F in the afternoon and slips back to 51°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 83°F. Set against its neighbours, October runs about 5°F cooler than September and about 9°F warmer than November.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17654
27654
37653
47653
57553
67553
77553
87553
97552
107452
117452
127452
137452
147452
157452
167351
177351
187351
197351
207251
217251
227250
237150
247150
257149
267149
277049
287049
296948
306948
316948

Gilroy weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan58° / 41°3.48.39.74.6
Feb60° / 43°3.48.510.65.0
Mar63° / 45°2.5811.76.0
Apr66° / 47°1.14.612.97.1
May70° / 50°0.52.8148.1
Jun75° / 53°0.10.614.59.2
Jul79° / 57°0.00.214.39.2
Aug79° / 57°0.00.113.49.2
Sep78° / 56°0.10.412.39.2
Oct73° / 51°0.71.9118.7
Nov64° / 45°1.44.7106.7
Dec58° / 40°3.07.79.54.6

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 12% of October, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28911
38812
48812
58812
68614
78614
88515
98416
108416
118317
128317
138317
148218
158119
168218
178218
188218
198119
208119
218119
228119
238020
248020
257921
267921
277822
287723
297723
307525
317525

Chance of precipitation in October

Any precipitation

Gilroy gets around 0.7 in of rain over 1.9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 10% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
54
64
74
85
95
105
115
125
135
145
155
165
175
185
196
206
216
227
237
248
258
268
279
289
299
3010
3110

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
18119
28218
38317
48416
58515
68614
78713
88713
98812
108911
118911
129010
139010
149010
159010
16919
17919
18928
19928
20928
21937
22937
23946
24946
25955
26955
27955
28955
29964
30964
31964

Wind in October

Winds average 3 mph in October, the calmest month.

Across October, daily wind ranges from about 3 mph on the calmest days to 3 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over October. Sunrise moves from 6:06 AM to 6:35 AM, and sunset from 5:44 PM to 5:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:065:44
211.66:075:43
311.56:085:41
411.56:095:39
511.56:105:38
611.46:115:36
711.46:125:35
811.36:135:34
911.36:145:32
1011.36:155:31
1111.26:165:29
1211.26:165:28
1311.16:175:26
1411.16:185:25
1511.16:195:24
1611.06:205:22
1711.06:215:21
1811.06:225:20
1910.96:235:18
2010.96:245:17
2110.86:255:16
2210.86:265:15
2310.86:275:13
2410.76:285:12
2510.76:295:11
2610.76:305:10
2710.66:315:09
2810.66:325:08
2910.66:335:06
3010.56:345:05
3110.56:355:04

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.4 kWh/m².

For context, solar energy here swings from a low near 2.4 kWh/m² to a high of 7.96 kWh/m² in June across the year — October's 4.4 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
313.6Moderate
Planning a trip in October

Is October a good time to visit Gilroy?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.7
Sightseeing
5th-best month of the year
6.5
Beach & pool
5th-best month of the year

October is one of the better times to visit Gilroy for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Gilroy in October

From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In October, Gilroy sees daytime highs around 73°F and nights near 51°F. Worth packing: light clothes.

light clothes

Sea temperature near Gilroy in October

The nearest coast averages about 58°F in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 mi away) is warmest in September at about 58°F and coldest in April near 54°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan55Bracing
Feb55Bracing
Mar55Bracing
Apr54Bracing
May54Bracing
Jun55Bracing
Jul57Bracing
Aug58Bracing
Sep58Bracing
Oct58Bracing
Nov56Bracing
Dec55Bracing

UV index in Gilroy in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gilroy peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 10Dec 14UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep7High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Gilroy in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Gilroy is worst in August — around 22 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 5 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1920 µg/m³Jun 135 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar8Good
Apr7Good
May6Good
Jun5Good
Jul8Good
Aug22Moderate
Sep15Moderate
Oct12Moderate
Nov8Good
Dec7Good
Location & terrain

Where is Gilroy?

Gilroy sits at 37.0°N, 121.6°W, 200 ft above sea level, in United States. The nearest listed city is Morgan Hill, 9.9 mi away.

Topography around Gilroy

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Gilroy.

Within 2 miles, the terrain around Gilroy has only modest variations in elevation — a maximum elevation change of 640 ft around an average of 217 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,871 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,161 ft.

The land around Gilroy is covered by artificial surfaces (49%) and cropland (25%) within 2 miles, trees (38%) and grassland (36%) within 10 miles, and grassland (39%) and trees (27%) within 50 miles.

2 miles
640 ft
10 miles
2,871 ft
50 miles
5,161 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Morgan Hill 9.9 mi · Watsonville 12 mi · Hollister 14 mi · Prunedale 17 mi · Live Oak 23 mi · Salinas 23 mi · Santa Cruz 25 mi · Marina 25 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Gilroy (37.0058°, -121.5683°, elevation 200 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).