Livermore weather in October

In October, Livermore sees average daytime highs of 74°F and overnight lows near 52°F, with 0.8 in of rain across 2.8 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 78°F in the first days to 69°F by the end. The sky is clear or mostly clear about 69% 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 24 min by month's end. Set against the rest of the year, October is Livermore's 5th-clearest and 9th-windiest month. For the whole year in context, see Livermore's year-round climate.

Daytime high
74°
5th warmest
Overnight low
52°
8th coldest
Rainfall
0.8 in
2.8 wet days
Daylight
11 hours
6:22 AM – 5:22 PM
Cloud cover
28%
5th clearest
Wind
4 mph
9th windiest
Solar energy
4.38 kWh/m²
Travel score
8.6
out of 10

Livermore is city in Alameda County, California, United States.

Density
1,264/km²
people per km²
Founded
1869

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 78°F in the first days to 69°F by the end.

A typical October day in Livermore reaches about 74°F in the afternoon and slips back to 52°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 83°F. Set against its neighbours, October runs about 7°F cooler than September and about 11°F warmer than November.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17854
27854
37854
47754
57754
67753
77653
87653
97653
107653
117653
127553
137552
147552
157452
167452
177452
187452
197351
207351
217351
227251
237251
247151
257150
267150
277050
287049
296949
306949
316949

Livermore 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
Jan56° / 41°3.49.49.74.0
Feb59° / 43°3.38.810.54.7
Mar63° / 45°2.68.711.75.9
Apr68° / 47°1.35.212.97.2
May73° / 51°0.63148.4
Jun80° / 55°0.20.814.68.8
Jul84° / 58°0.00.214.37.8
Aug83° / 58°0.10.313.57.8
Sep81° / 56°0.10.512.38.7
Oct74° / 52°0.82.8118.6
Nov63° / 45°1.65.6106.3
Dec56° / 41°3.18.89.44.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 11% of October, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28812
38812
48713
58614
68515
78515
88416
98317
108317
118119
128119
138119
148020
157921
167921
177921
187822
197723
207723
217723
227723
237624
247624
257624
267426
277426
287327
297327
307228
317129

Chance of precipitation in October

Any precipitation

Livermore gets around 0.8 in of rain over 2.8 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 9% and peaks near 14% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
46
56
66
76
87
97
107
117
127
137
147
157
168
178
188
199
209
219
2210
2310
2411
2511
2612
2712
2812
2913
3013
3114

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1919
2928
3928
4937
5937
6946
7946
8946
9946
10946
11946
12946
13946
14946
15946
16946
17946
18946
19955
20955
21955
22955
23955
24964
25964
26964
27964
28964
29964
30964
31964

Wind in October

Winds average 4 mph in October.

Across October, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:08 AM to 6:37 AM, and sunset from 5:45 PM to 5:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:085:45
211.66:085:43
311.56:095:41
411.56:105:40
511.56:115:38
611.46:125:37
711.46:135:35
811.36:145:34
911.36:155:32
1011.26:165:31
1111.26:175:29
1211.26:185:28
1311.16:195:27
1411.16:205:25
1511.06:215:24
1611.06:225:22
1711.06:235:21
1810.96:245:20
1910.96:255:18
2010.96:265:17
2110.86:275:16
2210.86:285:14
2310.76:295:13
2410.76:305:12
2510.76:315:11
2610.66:325:10
2710.66:335:08
2810.66:345:07
2910.56:355:06
3010.56:365:05
3110.46:375:04

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.38 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 8.21 kWh/m² in June across the year — October's 4.38 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
313.6Moderate
Planning a trip in October

Is October a good time to visit Livermore?

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

8.6
Sightseeing
3rd-best month of the year
6.6
Beach & pool
5th-best month of the year

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

What to pack for Livermore in October

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

In October, Livermore sees daytime highs around 74°F and nights near 52°F. Worth packing: light clothes.

light clothes

Sea temperature near Livermore 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 39 mi away) is warmest in August at about 59°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
Jan54Bracing
Feb54Bracing
Mar54Bracing
Apr54Bracing
May54Bracing
Jun55Bracing
Jul57Bracing
Aug59Bracing
Sep59Bracing
Oct58Bracing
Nov56Bracing
Dec55Bracing

UV index in Livermore 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 Livermore peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 15UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Livermore 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 Livermore is worst in August — around 34 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1832 µg/m³Jun 157 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul9Good
Aug34Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec12Good
Location & terrain

Where is Livermore?

Livermore sits at 37.7°N, 121.8°W, 492 ft above sea level, in United States. The nearest listed city is Pleasanton, 6.2 mi away.

Topography around Livermore

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

Within 2 miles, the terrain around Livermore has only modest variations in elevation — a maximum elevation change of 259 ft around an average of 509 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,064 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,452 ft.

The land around Livermore is covered by artificial surfaces (62%) and grassland (21%) within 2 miles, grassland (67%) within 10 miles, and grassland (30%) and trees (28%) within 50 miles.

2 miles
259 ft
10 miles
3,064 ft
50 miles
4,452 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
October weather nearby: Pleasanton 6.2 mi · Dublin 9.3 mi · San Ramon 13 mi · Union City 15 mi · Fremont 15 mi · Danville 16 mi · Hayward 17 mi · Castro Valley 17 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 Livermore (37.6819°, -121.768°, elevation 492 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).