Hazel Dell weather in September

In September, Hazel Dell sees average daytime highs of 73°F and overnight lows near 52°F, with 2.5 in of rain across 6.8 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 69°F by the end. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Hazel Dell's 3rd-clearest and 11th-windiest month. For the whole year in context, see Hazel Dell's year-round climate.

Daytime high
73°
3rd warmest
Overnight low
52°
10th coldest
Rainfall
2.5 in
6.8 wet days
Daylight
12 h 18 min
5:55 AM – 6:14 PM
Cloud cover
43%
3rd clearest
Wind
4 mph
11th windiest
Solar energy
4.4 kWh/m²
Travel score
7.5
out of 10

Hazel Dell is unincorporated area and census-designated place in Clark County, Washington, United States.

Density
1,547/km²
people per km²

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 76°F in the first days to 69°F by the end.

A typical September day in Hazel Dell reaches about 73°F in the afternoon and slips back to 52°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 85°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17754
27754
37654
47654
57654
67654
77653
87553
97553
107553
117453
127453
137453
147452
157352
167352
177352
187252
197251
207251
217151
227151
237151
247150
257050
267050
276950
286949
296949
306849

How September really feels in Hazel Dell

Once humidity and wind are folded in, September 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

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

Hazel Dell weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 36°8.218.33.28.90.9
Feb49° / 37°6.015.22.610.11.7
Mar54° / 39°7.018.31.911.62.5
Apr59° / 42°5.616.60.313.33.7
May66° / 47°3.512014.75.7
Jun71° / 51°2.48.8015.46.7
Jul78° / 55°0.62.9015.18.2
Aug79° / 56°0.83.3013.98.1
Sep73° / 52°2.56.8012.37.5
Oct61° / 45°5.613.3010.74.8
Nov50° / 39°8.918.20.99.31.9
Dec44° / 35°9.118.43.38.60.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26832
36832
46733
56733
66733
76634
86535
96436
106337
116238
126139
136040
146040
156040
166040
176040
185941
195941
205941
215842
225941
235941
245941
255941
265941
276040
286040
295941
305842

Chance of precipitation in September

Any precipitation

Hazel Dell gets around 2.5 in of rain over 6.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
116
216
316
417
517
618
719
819
920
1021
1121
1222
1323
1423
1523
1624
1724
1825
1925
2025
2126
2226
2326
2427
2527
2627
2728
2829
2930
3030

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
177230
278220
378220
478220
579210
679210
780200
881190
981190
1080191
1181181
1281181
1382171
1482171
1582171
1683161
1783161
1884151
1984151
2085141
2185141
2286131
2387121
2487121
2588111
2689101
279091
289091
299181
309181

Wind in September

Winds average 4 mph in September.

Across September, 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.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 5:36 AM to 6:14 AM, and sunset from 6:44 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:366:44
213.15:386:42
313.05:396:40
413.05:406:38
512.95:426:36
612.95:436:35
712.85:446:33
812.85:456:31
912.75:476:29
1012.65:486:27
1112.65:496:25
1212.55:506:23
1312.55:526:21
1412.45:536:19
1512.45:546:16
1612.35:556:14
1712.35:576:12
1812.25:586:10
1912.25:596:08
2012.16:016:06
2112.06:026:04
2212.06:036:02
2311.96:046:00
2411.96:065:58
2511.86:075:56
2611.86:085:54
2711.76:105:52
2811.76:115:50
2911.66:125:48
3011.56:145:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.4 kWh/m².

For context, solar energy here swings from a low near 0.98 kWh/m² to a high of 6.74 kWh/m² in July across the year — September's 4.4 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.0Bright
224.0Bright
234.0Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Hazel Dell

In seasonPeak

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

Hazel Dell'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 September a good time to visit Hazel Dell?

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

7.5
Sightseeing
3rd-best month of the year
5.6
Beach & pool
3rd-best month of the year

September is one of the better times to visit Hazel Dell for general sightseeing.

What to pack for Hazel Dell in September

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

In September, Hazel Dell sees daytime highs around 73°F and nights near 52°F. Worth packing: light clothes. About 7 days see rain.

light clothes

UV index in Hazel Dell in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Hazel Dell peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 17UV 8Dec 15UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May8Very high
Jun7High
Jul8Very high
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Hazel Dell in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Hazel Dell is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1621 µg/m³Jan 117 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar11Good
Apr11Good
May10Good
Jun9Good
Jul8Good
Aug13Moderate
Sep22Moderate
Oct14Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Hazel Dell?

Hazel Dell sits at 45.7°N, 122.7°W, 210 ft above sea level, in United States. The nearest listed city is Vancouver, 2.5 mi away.

Topography around Hazel Dell

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

Within 2 miles, the terrain around Hazel Dell has only modest variations in elevation — a maximum elevation change of 358 ft around an average of 190 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,237 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,287 ft.

The land around Hazel Dell is covered by trees (52%) and artificial surfaces (34%) within 2 miles, trees (41%) and grassland (23%) within 10 miles, and trees (80%) within 50 miles.

2 miles
358 ft
10 miles
1,237 ft
50 miles
8,287 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Vancouver 2.5 mi · Salmon Creek 2.5 mi · Five Corners 4.3 mi · Orchards 5.0 mi · Battle Ground 9.9 mi · Portland 11 mi · Bethany 12 mi · Camas 14 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 Hazel Dell (45.6715°, -122.6629°, elevation 210 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).