Clearlake weather in July

In July, Clearlake sees average daytime highs of 87°F and overnight lows near 64°F, with 0.0 in of rain across 0.2 wet days and about 14.5 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 90% of the time in July, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of July to 14 h 06 min by month's end. Set against the rest of the year, July is Clearlake's 1st-clearest and 6th-windiest month. For the whole year in context, see Clearlake's year-round climate.

Daytime high
87°
1st warmest
Overnight low
64°
12th coldest
Rainfall
0.0 in
0.2 wet days
Daylight
14 h 30 min
5:02 AM – 7:31 PM
Cloud cover
10%
1st clearest
Wind
4 mph
6th windiest
Solar energy
8.26 kWh/m²
Travel score
6.6
out of 10

Clearlake is city in Lake County, California, United States.

Density
554/km²
people per km²
Founded
1980

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical July day in Clearlake reaches about 87°F in the afternoon and slips back to 64°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 94°F. Set against its neighbours, July runs about 6°F warmer than June and on par with August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18562
28562
38562
48562
58562
68663
78663
88663
98663
108663
118663
128763
138763
148764
158764
168764
178764
188764
198764
208764
218764
228864
238864
248864
258864
268864
278864
288864
298864
308864
318864

Clearlake weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan53° / 38°6.110.91.49.62.8
Feb55° / 40°5.99.41.710.53.6
Mar59° / 42°4.710.41.411.74.6
Apr64° / 45°2.16.50.3136.2
May71° / 51°1.44.7014.17.8
Jun80° / 58°0.52.1014.78.2
Jul87° / 64°0.00.2014.56.6
Aug86° / 63°0.10.4013.56.7
Sep82° / 59°0.21012.38.2
Oct72° / 52°1.63.80118.2
Nov60° / 43°3.27.10.29.95.1
Dec52° / 38°6.210.50.89.32.8

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 90% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of July, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2937
3937
4946
5955
6955
7955
8955
9955
10955
11955
12955
13955
14955
15955
16955
17955
18955
19955
20955
21946
22946
23946
24946
25946
26946
27946
28946
29946
30946
31946

Chance of precipitation in July

Any precipitation

Clearlake gets around 0.0 in of rain over 0.2 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
33
43
52
62
72
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301
311

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
188120
287130
387130
487130
585141
685141
785141
884151
983161
1084160
1183170
1282180
1381190
1480200
1579210
1678220
1777230
1877230
1976240
2076240
2175250
2275250
2375250
2475250
2575250
2675250
2776240
2876240
2977230
3078220
3178220

Wind in July

Winds average 4 mph in July.

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

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
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 July

DaylightNight

Daylight runs from about 14 h 42 min at the start of July to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 4:53 AM to 5:14 AM, and sunset from 7:35 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:537:35
214.74:537:35
314.74:547:35
414.74:547:35
514.74:557:34
614.74:557:34
714.64:567:34
814.64:567:34
914.64:577:34
1014.64:587:33
1114.64:587:33
1214.64:597:32
1314.55:007:32
1414.55:007:32
1514.55:017:31
1614.55:027:31
1714.55:027:30
1814.45:037:29
1914.45:047:29
2014.45:057:28
2114.45:057:28
2214.35:067:27
2314.35:077:26
2414.35:087:25
2514.35:097:25
2614.25:107:24
2714.25:107:23
2814.25:117:22
2914.25:127:21
3014.15:137:20
3114.15:147:19

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 8.26 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 8.26 kWh/m² in July across the year — July's 8.26 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.3Intense
28.3Intense
38.3Intense
48.3Intense
58.3Intense
68.3Intense
78.3Intense
88.3Intense
98.3Intense
108.3Intense
118.3Intense
128.3Intense
138.3Intense
148.3Intense
158.3Intense
168.3Intense
178.2Intense
188.2Intense
198.2Intense
208.2Intense
218.2Intense
228.1Intense
238.1Intense
248.1Intense
258.1Intense
268.1Intense
278.0Intense
288.0Intense
298.0Intense
308.0Intense
317.9Intense
Planning a trip in July

Hazard calendar for Clearlake

In seasonPeak

None of Clearlake's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Clearlake's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Clearlake?

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

6.6
Sightseeing
6th-best month of the year
9.1
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Clearlake for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Clearlake in July

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

In July, Clearlake sees daytime highs around 87°F and nights near 64°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Clearlake in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Clearlake peaks around June 23 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 23UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr6High
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Low

Air quality in Clearlake in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Clearlake is worst in September — around 31 µg/m³ PM2.5 (moderate), about 5.8× the cleanest month (June, 5 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1031 µg/m³Jun 106 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar9Good
Apr8Good
May6Good
Jun5Good
Jul14Moderate
Aug29Moderate
Sep31Moderate
Oct14Moderate
Nov8Good
Dec6Good
Location & terrain

Where is Clearlake?

Clearlake sits at 39.0°N, 122.6°W, 1,417 ft above sea level, in United States. The nearest listed city is Windsor, 30 mi away.

Topography around Clearlake

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

Within 2 miles, the terrain around Clearlake has significant variations in elevation — a maximum elevation change of 853 ft around an average of 1,493 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,409 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,982 ft.

The land around Clearlake is covered by trees (39%) and grassland (28%) within 2 miles, trees (52%) and grassland (38%) within 10 miles, and trees (52%) and grassland (30%) within 50 miles.

2 miles
853 ft
10 miles
3,409 ft
50 miles
6,982 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Windsor 30 mi · Ukiah 34 mi · Santa Rosa 36 mi · Rohnert Park 43 mi · Agua Caliente 45 mi · Napa 49 mi · Woodland 50 mi · Petaluma 50 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 Clearlake (38.9582°, -122.6264°, elevation 1,417 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. 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).