Spanaway weather in September

In September, Spanaway sees average daytime highs of 68°F and overnight lows near 51°F, with 2.3 in of rain across 7.2 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 71°F in the first days to 65°F by the end. The sky is clear or mostly clear about 41% 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 Spanaway's 3rd-clearest and 11th-windiest month. For the whole year in context, see Spanaway's year-round climate.

Daytime high
68°
3rd warmest
Overnight low
51°
10th coldest
Rainfall
2.3 in
7.2 wet days
Daylight
12 h 18 min
5:54 AM – 6:14 PM
Cloud cover
47%
3rd clearest
Wind
5 mph
11th windiest
Solar energy
4.12 kWh/m²
Travel score
6.9
out of 10

Spanaway is census designated place in Pierce County, Washington, United States.

Density
1,149/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 71°F in the first days to 65°F by the end.

A typical September day in Spanaway reaches about 68°F in the afternoon and slips back to 51°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 78°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17253
27253
37153
47153
57152
67152
77152
87052
97052
107052
117051
126951
136951
146951
156951
166851
176851
186850
196750
206750
216750
226750
236649
246649
256649
266549
276549
286548
296448
306448

How September really feels in Spanaway

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.

Spanaway 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° / 37°7.417.93.88.70.9
Feb48° / 37°5.314.73.1101.4
Mar52° / 38°6.118.12.411.62.1
Apr56° / 42°4.715.80.413.33.3
May63° / 47°3.111.5014.85.2
Jun67° / 51°2.18.5015.66.3
Jul74° / 54°0.73.7015.38.1
Aug74° / 54°1.040148.2
Sep68° / 51°2.37.2012.46.9
Oct58° / 45°5.013.2010.64.1
Nov49° / 39°8.118.11.19.11.7
Dec44° / 36°7.617.33.58.40.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% 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 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36139
46139
56139
66139
76139
86040
95941
105941
115842
125743
135644
145743
155644
165545
175644
185644
195545
205644
215644
225545
235545
245644
255644
265644
275644
285545
295545
305446

Chance of precipitation in September

Any precipitation

Spanaway gets around 2.3 in of rain over 7.2 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 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
119
219
320
420
520
620
721
821
922
1023
1123
1223
1324
1424
1524
1625
1725
1825
1925
2026
2126
2227
2327
2427
2528
2628
2729
2829
2930
3031

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
174251
275241
375241
475241
576231
677221
777221
878211
978211
1079201
1179201
1280191
1380191
1481181
1581181
1682171
1782171
1883161
1984151
2084151
2186140
2287130
2387130
2488120
2589110
2690100
2790100
289190
299280
309280

Wind in September

Winds average 5 mph in September.

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 5:34 AM to 6:13 AM, and sunset from 6:45 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:346:45
213.15:356:43
313.15:366:41
413.05:386:39
513.05:396:37
612.95:416:35
712.85:426:33
812.85:436:31
912.75:456:29
1012.75:466:27
1112.65:476:25
1212.65:496:22
1312.55:506:20
1412.45:516:18
1512.45:536:16
1612.35:546:14
1712.35:556:12
1812.25:576:10
1912.25:586:08
2012.16:006:06
2112.06:016:04
2212.06:026:01
2311.96:045:59
2411.96:055:57
2511.86:065:55
2611.86:085:53
2711.76:095:51
2811.66:115:49
2911.66:125:47
3011.56:135:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 0.91 kWh/m² to a high of 6.34 kWh/m² in July across the year — September's 4.12 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.0Bright
174.0Moderate
183.9Moderate
193.9Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.6Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Spanaway

In seasonPeak

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

Spanaway'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 Spanaway?

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

6.9
Sightseeing
3rd-best month of the year
3.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Spanaway for sightseeing.

What to pack for Spanaway in September

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

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

UV index in Spanaway 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 Spanaway 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7Very high
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Spanaway 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 Spanaway 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 Spanaway?

Spanaway sits at 47.1°N, 122.4°W, 381 ft above sea level, in United States. The nearest listed city is Parkland, 3.7 mi away.

Topography around Spanaway

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

Within 2 miles, the terrain around Spanaway has only modest variations in elevation — a maximum elevation change of 226 ft around an average of 377 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 974 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 14,403 ft.

The land around Spanaway is covered by trees (62%) within 2 miles, trees (56%) and grassland (23%) within 10 miles, and trees (78%) within 50 miles.

2 miles
226 ft
10 miles
974 ft
50 miles
14,403 ft
treesgrasslandartificial surfaceswater
September weather nearby: Parkland 3.7 mi · Frederickson 3.7 mi · Lakewood 6.2 mi · Graham 7.5 mi · South Hill 8.1 mi · Puyallup 8.7 mi · Tacoma 11 mi · University Place 11 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 Spanaway (47.104°, -122.4346°, elevation 381 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).