Union Hill-Novelty Hill weather in April

In April, Union Hill-Novelty Hill sees average daytime highs of 57°F and overnight lows near 41°F, with 5.9 in of precipitation across 16.7 wet days and about 13.3 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 55°F in the first days to 60°F by the end. The sky is clear or mostly clear about 14% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of April to 14 h 06 min by month's end. Set against the rest of the year, April is Union Hill-Novelty Hill's 8th-clearest and 6th-windiest month. For the whole year in context, see Union Hill-Novelty Hill's year-round climate.

Daytime high
57°
7th warmest
Overnight low
41°
6th coldest
Precipitation
5.9 in
16.7 wet days
Daylight
13 h 24 min
5:27 AM – 6:50 PM
Cloud cover
72%
8th clearest
Wind
5 mph
6th windiest
Solar energy
4.27 kWh/m²
Travel score
3.4
out of 10

Union Hill-Novelty Hill is census designated place in King County, Washington, United States.

Density
299/km²
people per km²

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 55°F in the first days to 60°F by the end.

A typical April day in Union Hill-Novelty Hill reaches about 57°F in the afternoon and slips back to 41°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 67°F. Set against its neighbours, April runs about 5°F warmer than March and about 6°F cooler than May.

30°40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
15539
25539
35540
45540
55540
65540
75540
85640
95640
105640
115640
125641
135641
145741
155741
165741
175741
185842
195842
205842
215842
225942
235942
245942
255943
266043
276043
286043
296043
306043

How April really feels in Union Hill-Novelty Hill

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 0 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
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Union Hill-Novelty Hill weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 36°9.01948.70.8
Feb48° / 36°6.115.52.99.91.5
Mar52° / 38°7.119.12.311.62.2
Apr57° / 41°5.916.70.313.33.4
May63° / 46°4.113.2014.95.1
Jun67° / 51°3.511.4015.75.9
Jul73° / 54°1.66.3015.47.6
Aug74° / 54°1.85.7014.17.8
Sep68° / 49°3.79.2012.46.5
Oct58° / 43°7.415.3010.63.8
Nov49° / 38°9.919.10.99.11.6
Dec44° / 35°8.718.73.98.30.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22377
32377
42278
52278
62278
72278
82278
92278
102377
112377
122476
132674
142773
152872
162872
172872
183070
193070
203070
213169
223268
233268
243268
253169
263169
273268
283169
293169
303268

Chance of precipitation in April

Any precipitationSnow

Union Hill-Novelty Hill gets around 5.9 in of rain and snow over 16.7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 55% and peaks near 59% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1594
2584
3583
4583
5583
6582
7582
8572
9572
10571
11571
12571
13561
14561
15561
16561
17551
18551
19551
20541
21541
22540
23530
24530
25530
26520
27520
28510
29510
30500

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April 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%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
27991
28991
29991
30991

Wind in April

Winds average 5 mph in April.

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

0246810151015202530
Wind speed (mph)Feels
15calm
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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 96 minutes over April. Sunrise moves from 5:57 AM to 5:01 AM, and sunset from 6:28 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:576:28
212.65:556:30
312.65:536:31
412.75:516:33
512.85:496:34
612.85:476:35
712.95:456:37
812.95:436:38
913.05:416:40
1013.05:396:41
1113.15:376:43
1213.25:356:44
1313.25:336:46
1413.35:316:47
1513.35:296:48
1613.45:276:50
1713.45:256:51
1813.55:236:53
1913.65:216:54
2013.65:196:56
2113.75:176:57
2213.75:156:58
2313.85:137:00
2413.85:127:01
2513.95:107:03
2613.95:087:04
2714.05:067:06
2814.05:047:07
2914.15:037:08
3014.15:017:10

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.27 kWh/m².

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.13 kWh/m² in July across the year — April's 4.27 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.8Moderate
63.8Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Bright
114.0Bright
124.1Bright
134.2Bright
144.2Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.5Bright
204.5Bright
214.5Bright
224.6Bright
234.6Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
Planning a trip in April

Hazard calendar for Union Hill-Novelty Hill

In seasonPeak

In April, Union Hill-Novelty Hill sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Union Hill-Novelty Hill'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 April a good time to visit Union Hill-Novelty Hill?

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

3.4
Sightseeing
7th-best month of the year
0.1
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Union Hill-Novelty Hill.

What to pack for Union Hill-Novelty Hill in April

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

In April, Union Hill-Novelty Hill sees daytime highs around 57°F and nights near 41°F. Pack rain gear. Worth having: a warm layer. About 17 days see rain.

rain geara warm layer

UV index in Union Hill-Novelty Hill in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Union Hill-Novelty Hill 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 Union Hill-Novelty Hill in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Union Hill-Novelty Hill 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 Union Hill-Novelty Hill?

Union Hill-Novelty Hill sits at 47.7°N, 122.0°W, 551 ft above sea level, in United States. The nearest listed city is Sammamish, 3.7 mi away.

Topography around Union Hill-Novelty Hill

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Union Hill-Novelty Hill.

Within 2 miles, the terrain around Union Hill-Novelty Hill has only modest variations in elevation — a maximum elevation change of 689 ft around an average of 505 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,470 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,799 ft.

The land around Union Hill-Novelty Hill is covered by trees (85%) within 2 miles, trees (75%) within 10 miles, and trees (76%) within 50 miles.

2 miles
689 ft
10 miles
1,470 ft
50 miles
7,799 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Sammamish 3.7 mi · Redmond 4.3 mi · Cottage Lake 5.0 mi · City of Sammamish 5.0 mi · West Lake Sammamish 8.1 mi · Kirkland 8.7 mi · Bellevue 9.3 mi · Inglewood-Finn Hill 9.9 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 Union Hill-Novelty Hill (47.6789°, -122.0283°, elevation 551 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).