Martha Lake weather in August

In August, Martha Lake sees average daytime highs of 72°F and overnight lows near 56°F, with 1.5 in of rain across 5.2 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 73°F in the first days to 70°F by the end. The sky is clear or mostly clear about 49% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 48 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Martha Lake's 1st-clearest and 11th-windiest month. For the whole year in context, see Martha Lake's year-round climate.

Daytime high
72°
1st warmest
Overnight low
56°
12th coldest
Rainfall
1.5 in
5.2 wet days
Daylight
14 h 06 min
5:10 AM – 7:16 PM
Cloud cover
43%
1st clearest
Wind
4 mph
11th windiest
Solar energy
5.33 kWh/m²
Travel score
7.7
out of 10

Martha Lake is census designated place in Snohomish County, Washington, United States.

Density
1,288/km²
people per km²

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 73°F in the first days to 70°F by the end.

A typical August day in Martha Lake reaches about 72°F in the afternoon and slips back to 56°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 79°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17357
27357
37357
47357
57357
67357
77357
87357
97357
107357
117357
127357
137357
147357
157357
167256
177256
187256
197256
207256
217256
227156
237156
247156
257156
267155
277155
287055
297055
307055
317055

Martha Lake weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 39°7.118.32.18.60.9
Feb48° / 39°4.714.91.89.91.5
Mar51° / 41°5.517.80.811.62.1
Apr56° / 44°4.415.40.113.43.2
May62° / 48°3.112.5014.94.9
Jun66° / 52°2.810.7015.75.9
Jul71° / 56°1.36015.47.6
Aug72° / 56°1.55.2014.17.7
Sep66° / 53°2.88.7012.46.5
Oct58° / 47°5.614.6010.63.8
Nov50° / 42°7.818.10.69.11.7
Dec45° / 38°7.117.92.18.30.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27228
37228
47030
57030
66931
76931
86832
96733
106634
116634
126436
136436
146436
156436
166337
176337
186337
196337
206337
216238
226238
236139
246139
256139
266139
276139
286139
296139
306139
316139

Chance of precipitation in August

Any precipitation

Martha Lake gets around 1.5 in of rain over 5.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 24% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
112
212
312
412
512
612
713
813
913
1014
1114
1214
1315
1415
1515
1616
1716
1817
1917
2018
2118
2219
2320
2420
2521
2621
2722
2823
2923
3024
3124

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 61% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
157412
257412
357412
456422
555432
655432
754442
854442
954442
1054442
1154442
1254442
1355432
1456422
1557412
1658402
1759392
1861372
1962362
2063352
2164342
2265332
2367321
2468311
2569301
2670291
2770291
2871281
2972271
3072271
3174260

Wind in August

Winds average 4 mph in August.

Across August, 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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 48 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 4:50 AM to 5:31 AM, and sunset from 7:40 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:507:40
214.84:517:39
314.84:527:38
414.74:547:36
514.74:557:35
614.64:567:33
714.64:587:31
814.54:597:30
914.55:007:28
1014.45:027:27
1114.45:037:25
1214.35:047:23
1314.35:067:22
1414.25:077:20
1514.25:087:18
1614.15:107:16
1714.15:117:15
1814.05:137:13
1913.95:147:11
2013.95:157:09
2113.85:177:07
2213.85:187:05
2313.75:197:03
2413.75:217:01
2513.65:226:59
2613.65:246:57
2713.55:256:55
2813.45:266:53
2913.45:286:51
3013.35:296:49
3113.35:316:47

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.33 kWh/m².

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.07 kWh/m² in July across the year — August's 5.33 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Martha Lake

In seasonPeak

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

Martha Lake's rainy season runs October–April, when most of the year's rain falls.

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

Is August a good time to visit Martha Lake?

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

7.7
Sightseeing
1st-best month of the year
5.5
Beach & pool
1st-best month of the year

August is one of the better times to visit Martha Lake for general sightseeing.

What to pack for Martha Lake in August

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

In August, Martha Lake sees daytime highs around 72°F and nights near 56°F. Worth packing: light clothes and sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Martha Lake in August

The nearest coast averages about 53°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 mi away) is warmest in August at about 53°F and coldest in February near 46°F.

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

45°50°55°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan46Bracing
Feb46Bracing
Mar47Bracing
Apr48Bracing
May50Bracing
Jun52Bracing
Jul53Bracing
Aug53Bracing
Sep53Bracing
Oct50Bracing
Nov49Bracing
Dec47Bracing

UV index in Martha Lake in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Martha Lake peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Martha Lake in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Martha Lake is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodModerateGoodAug 2119 µg/m³Dec 157 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr12Good
May13Moderate
Jun11Good
Jul10Good
Aug20Moderate
Sep18Moderate
Oct11Good
Nov7Good
Dec6Good
Location & terrain

Where is Martha Lake?

Martha Lake sits at 47.9°N, 122.2°W, 469 ft above sea level, in United States. The nearest listed city is Mill Creek, 1.9 mi away.

Topography around Martha Lake

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

Within 2 miles, the terrain around Martha Lake has only modest variations in elevation — a maximum elevation change of 413 ft around an average of 430 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 771 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,589 ft.

The land around Martha Lake is covered by trees (66%) and artificial surfaces (29%) within 2 miles, trees (50%) and water (22%) within 10 miles, and trees (69%) within 50 miles.

2 miles
413 ft
10 miles
771 ft
50 miles
7,589 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Mill Creek 1.9 mi · Mill Creek East 2.5 mi · Picnic Point-North Lynnwood 2.5 mi · Bothell West 3.1 mi · North Creek 3.7 mi · Silver Firs 4.3 mi · Lynnwood 4.3 mi · Eastmont 4.3 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 Martha Lake (47.8509°, -122.2393°, elevation 469 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).