West Lake Sammamish weather in March

In March, West Lake Sammamish sees average daytime highs of 52°F and overnight lows near 37°F, with 6.5 in of precipitation across 18.7 wet days and about 11.6 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 50°F in the first days to 54°F by the end. The sky is clear or mostly clear about 14% of the time in March, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of March to 12 h 30 min by month's end. Set against the rest of the year, March is West Lake Sammamish's 9th-clearest and 5th-windiest month. For the whole year in context, see West Lake Sammamish's year-round climate.

Daytime high
52°
8th warmest
Overnight low
37°
4th coldest
Precipitation
6.5 in
18.7 wet days
Daylight
11 h 36 min
6:31 AM – 6:05 PM
Cloud cover
74%
9th clearest
Wind
5 mph
5th windiest
Solar energy
2.98 kWh/m²
Travel score
2.2
out of 10

West Lake Sammamish is census designated place.

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 50°F in the first days to 54°F by the end.

A typical March day in West Lake Sammamish reaches about 52°F in the afternoon and slips back to 37°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 44°F and 62°F. Set against its neighbours, March runs about 4°F warmer than February and about 5°F cooler than April.

20°30°40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
14936
25036
35036
45036
55036
65036
75137
85137
95137
105137
115137
125237
135237
145237
155238
165238
175338
185338
195338
205338
215338
225338
235338
245338
255438
265438
275438
285438
295438
305439
315439

How March really feels in West Lake Sammamish

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 7 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
7
wind chill below the day's low

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

West Lake Sammamish weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 35°8.318.73.68.70.8
Feb48° / 36°5.815.52.69.91.5
Mar52° / 37°6.518.71.811.62.2
Apr57° / 41°5.416.50.213.33.4
May63° / 46°3.812.8014.95.1
Jun67° / 50°3.211.4015.75.9
Jul74° / 54°1.36.5015.47.7
Aug74° / 54°1.65.7014.17.9
Sep68° / 49°3.49012.46.6
Oct58° / 43°6.615.1010.63.9
Nov49° / 38°9.018.719.11.6
Dec44° / 35°8.118.43.48.30.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 12% of March, with mostly cloudy or overcast conditions the remaining 74%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
22872
32872
42773
52773
62674
72674
82674
92575
102476
112575
122476
132476
142476
152476
162674
172575
182575
192575
202575
212674
222674
232674
242674
252674
262674
272575
282575
292575
302575
312575

Chance of precipitation in March

Any precipitationSnow

West Lake Sammamish gets around 6.5 in of rain and snow over 18.7 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 60% and peaks near 61% on the wettest days, and about 2 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
15810
25810
35810
4599
5599
6598
7608
8608
9617
10617
11617
12617
13617
14616
15616
16616
17616
18615
19615
20615
21605
22605
23605
24604
25594
26594
27594
28594
29593
30583
31583

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in March

Winds average 5 mph in March.

Across March, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 10 h 42 min at the start of March to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over March. Sunrise moves from 7:00 AM to 6:00 AM, and sunset from 5:43 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.77:005:43
210.86:595:44
310.86:575:46
410.96:555:47
510.96:535:49
611.06:515:50
711.06:495:52
811.16:475:53
911.26:455:55
1011.26:435:56
1111.36:415:58
1211.36:395:59
1311.46:376:01
1411.56:356:02
1511.56:336:04
1611.66:316:05
1711.66:296:07
1811.76:276:08
1911.76:256:10
2011.86:236:11
2111.96:216:13
2211.96:186:14
2312.06:166:15
2412.06:146:17
2512.16:126:18
2612.26:106:20
2712.26:086:21
2812.36:066:23
2912.36:046:24
3012.46:026:26
3112.56:006:27

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 2.98 kWh/m².

For context, solar energy here swings from a low near 0.9 kWh/m² to a high of 6.18 kWh/m² in July across the year — March's 2.98 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.7Moderate
102.7Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.9Moderate
152.9Moderate
163.0Moderate
173.0Moderate
183.1Moderate
193.1Moderate
203.2Moderate
213.2Moderate
223.3Moderate
233.3Moderate
243.4Moderate
253.4Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.6Moderate
303.6Moderate
313.7Moderate
Planning a trip in March

Hazard calendar for West Lake Sammamish

In seasonPeak

In March, West Lake Sammamish sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

West Lake Sammamish'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 March a good time to visit West Lake Sammamish?

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

2.2
Sightseeing
8th-best month of the year
0.0
Beach & pool
8th-best month of the year

March is a weaker month for outdoor sightseeing in West Lake Sammamish.

What to pack for West Lake Sammamish in March

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

In March, West Lake Sammamish sees daytime highs around 52°F and nights near 37°F. Pack a warm layer and rain gear. About 19 days see rain.

a warm layerrain gear

UV index in West Lake Sammamish in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in West Lake Sammamish 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 17 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 17UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in West Lake Sammamish in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in West Lake Sammamish is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodSep 1322 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Moderate
Apr12Good
May11Good
Jun10Good
Jul10Good
Aug18Moderate
Sep22Moderate
Oct12Good
Nov8Good
Dec7Good
Location & terrain

Where is West Lake Sammamish?

West Lake Sammamish sits at 47.6°N, 122.1°W, 30 ft above sea level, in United States. The nearest listed city is City of Sammamish, 3.7 mi away.

Topography around West Lake Sammamish

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

Within 2 miles, the terrain around West Lake Sammamish has significant variations in elevation — a maximum elevation change of 1,076 ft around an average of 272 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,005 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,695 ft.

The land around West Lake Sammamish is covered by trees (52%) and water (32%) within 2 miles, trees (66%) within 10 miles, and trees (76%) within 50 miles.

2 miles
1,076 ft
10 miles
3,005 ft
50 miles
9,695 ft
treesgrasslandartificial surfacesbare terrainwater
March weather nearby: City of Sammamish 3.7 mi · Sammamish 4.3 mi · Issaquah 4.3 mi · Bellevue 5.0 mi · Mercer Island 5.6 mi · Redmond 6.8 mi · Union Hill-Novelty Hill 8.1 mi · Columbia City 8.1 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 West Lake Sammamish (47.5776°, -122.1012°, elevation 30 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).