Aberdeen weather in September

In September, Aberdeen sees average daytime highs of 68°F and overnight lows near 51°F, with 2.5 in of rain across 7 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 70°F in the first days to 65°F by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Aberdeen's 3rd-clearest and 12th-windiest month. For the whole year in context, see Aberdeen's year-round climate.

Daytime high
68°
3rd warmest
Overnight low
51°
10th coldest
Rainfall
2.5 in
7 wet days
Daylight
12 h 18 min
6:00 AM – 6:20 PM
Cloud cover
49%
3rd clearest
Wind
5 mph
12th windiest
Solar energy
4.09 kWh/m²
Travel score
6.8
out of 10

Aberdeen is city in Grays Harbor County, Washington, United States.

Density
508/km²
people per km²
Founded
1884

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 70°F in the first days to 65°F by the end.

A typical September day in Aberdeen reaches about 68°F in the afternoon and slips back to 51°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 77°F. Set against its neighbours, September runs about 4°F cooler than August and about 9°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17053
27053
37053
47053
57053
67053
77052
86952
96952
106952
116952
126952
136852
146852
156852
166851
176851
186751
196751
206751
216751
226751
236650
246650
256650
266550
276550
286549
296549
306449

Aberdeen 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
Jan47° / 39°9.818.71.78.71.1
Feb49° / 39°6.415.21.5101.7
Mar52° / 40°7.418.4111.62.2
Apr56° / 43°5.415.60.113.33.2
May62° / 47°3.110.6014.85.1
Jun65° / 51°2.07.9015.66.2
Jul71° / 53°0.73.4015.37.7
Aug72° / 54°1.24.40147.7
Sep68° / 51°2.57012.46.8
Oct59° / 46°6.513.6010.64.2
Nov51° / 41°10.618.80.59.11.9
Dec46° / 38°10.218.22.18.41.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26139
36139
46139
56139
66139
76040
86040
95941
105743
115644
125644
135545
145545
155446
165446
175446
185446
195446
205545
215644
225644
235743
245743
255743
265743
275743
285644
295644
305446

Chance of precipitation in September

Any precipitation

Aberdeen gets around 2.5 in of rain over 7 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 24% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
120
220
321
421
521
622
722
822
923
1024
1124
1225
1325
1425
1525
1625
1725
1825
1925
2025
2125
2225
2325
2425
2525
2626
2726
2827
2928
3029

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
170291
270291
370291
470291
571281
672280
773270
873270
973270
1074260
1174260
1274260
1374251
1474251
1575241
1675241
1776231
1877221
1978211
2079201
2180191
2281181
2382171
2483161
2584151
2685141
2786131
2887121
2988120
3089110

Wind in September

Winds average 5 mph in September, the calmest month.

Across September, 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 September

DaylightNight

Daylight runs from about 13 h 12 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 102 minutes over September. Sunrise moves from 5:39 AM to 6:19 AM, and sunset from 6:50 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:396:50
213.15:416:48
313.15:426:46
413.05:436:44
513.05:456:42
612.95:466:40
712.85:486:38
812.85:496:36
912.75:506:34
1012.75:526:32
1112.65:536:30
1212.65:546:28
1312.55:566:26
1412.45:576:24
1512.45:586:22
1612.36:006:20
1712.36:016:17
1812.26:026:15
1912.26:046:13
2012.16:056:11
2112.06:066:09
2212.06:086:07
2311.96:096:05
2411.96:116:03
2511.86:126:01
2611.86:135:59
2711.76:155:57
2811.66:165:54
2911.66:175:52
3011.56:195:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.09 kWh/m².

For context, solar energy here swings from a low near 0.89 kWh/m² to a high of 6.25 kWh/m² in July across the year — September's 4.09 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.1Bright
154.0Bright
164.0Bright
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Aberdeen

In seasonPeak

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

Aberdeen'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 Aberdeen?

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

6.8
Sightseeing
3rd-best month of the year
3.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Aberdeen for sightseeing.

What to pack for Aberdeen in September

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

In September, Aberdeen sees daytime highs around 68°F and nights near 51°F. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near Aberdeen in September

The nearest coast averages about 58°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 mi away) is warmest in August at about 58°F and coldest in February near 48°F.

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

45°50°55°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan48Bracing
Feb48Bracing
Mar49Bracing
Apr51Bracing
May54Bracing
Jun56Bracing
Jul57Bracing
Aug58Bracing
Sep58Bracing
Oct55Bracing
Nov52Bracing
Dec49Bracing

UV index in Aberdeen 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 Aberdeen peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May8Very high
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Aberdeen?

Aberdeen sits at 47.0°N, 123.8°W, 23 ft above sea level, in United States. The nearest listed city is Tumwater, 43 mi away.

Topography around Aberdeen

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

Within 2 miles, the terrain around Aberdeen has only modest variations in elevation — a maximum elevation change of 581 ft around an average of 95 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 938 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,289 ft.

The land around Aberdeen is covered by trees (54%) within 2 miles, trees (82%) within 10 miles, and trees (70%) and water (24%) within 50 miles.

2 miles
581 ft
10 miles
938 ft
50 miles
6,289 ft
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Tumwater 43 mi · Olympia 43 mi · Centralia 45 mi · Lacey 47 mi · University Place 62 mi · Lakewood 63 mi · Spanaway 66 mi · Parkland 66 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 Aberdeen (46.9754°, -123.8157°, elevation 23 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).