Topeka weather in September

In September, Topeka sees average daytime highs of 79°F and overnight lows near 59°F, with 3.4 in of rain across 7.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 75°F by the end. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Topeka's 1st-clearest and 10th-windiest month. For the whole year in context, see Topeka's year-round climate.

Daytime high
79°
4th warmest
Overnight low
59°
9th coldest
Rainfall
3.4 in
7.6 wet days
Daylight
12 h 18 min
6:10 AM – 6:25 PM
Cloud cover
42%
1st clearest
Wind
8 mph
10th windiest
Solar energy
4.89 kWh/m²
Travel score
7.1
out of 10

Topeka is capital city of the U.S. state of Kansas and seat of Shawnee County.

Density
791/km²
people per km²
Founded
1854

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 84°F in the first days to 75°F by the end.

A typical September day in Topeka reaches about 79°F in the afternoon and slips back to 59°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 90°F. Set against its neighbours, September runs about 8°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18565
28464
38464
48464
58363
68363
78262
88262
98262
108161
118161
128060
138060
148059
157959
167959
177858
187858
197857
207757
217756
227756
237656
247655
257655
267654
277554
287553
297553
307453

How September really feels in Topeka

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.

Topeka weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 22°1.15.22.99.60.0
Feb44° / 25°1.65.62.810.50.9
Mar55° / 35°2.98.31.811.73.8
Apr65° / 45°4.3110.4135.8
May75° / 56°5.712.9014.16.3
Jun84° / 66°4.911.5014.75.4
Jul89° / 70°3.69.7014.54.4
Aug87° / 67°4.09.3013.55.0
Sep79° / 59°3.47.6012.37.1
Oct67° / 47°3.17.80.2116.8
Nov54° / 35°2.15.619.93.7
Dec43° / 25°1.64.72.39.30.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26634
36535
46634
56535
66535
76535
86436
96436
106436
116337
126337
136337
146337
156238
166238
176337
186337
196436
206535
216634
226634
236733
246832
256832
266931
276931
287030
297030
307129

Chance of precipitation in September

Any precipitation

Topeka gets around 3.4 in of rain over 7.6 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
227
327
427
527
627
727
827
927
1027
1128
1228
1328
1429
1529
1629
1729
1828
1928
2027
2127
2226
2325
2425
2524
2624
2724
2824
2924
3023

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11115263810
2121626379
3141626358
4161726338
5181826317
6201826296
7221925285
8241925275
9262024264
10282023254
11302023244
12312022233
13332021223
14352021223
15362020213
16382019202
17402019192
18421918192
19441917182
20461916172
21481815162
22501815152
23531714142
24541714132
25571713112
26601612102
2761161292
2864161181
2965151181
3067151071

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:56 AM to 6:23 AM, and sunset from 6:49 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:566:49
212.95:576:48
312.85:576:46
412.85:586:44
512.75:596:43
612.76:006:41
712.66:016:40
812.66:026:38
912.66:036:36
1012.56:046:35
1112.56:056:33
1212.46:066:31
1312.46:076:30
1412.36:086:28
1512.36:096:26
1612.36:106:25
1712.26:106:23
1812.26:116:21
1912.16:126:20
2012.16:136:18
2112.06:146:16
2212.06:156:14
2311.96:166:13
2411.96:176:11
2511.96:186:09
2611.86:196:08
2711.86:206:06
2811.76:216:05
2911.76:226:03
3011.66:236:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.89 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 6.63 kWh/m² in July across the year — September's 4.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Topeka?

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

7.1
Sightseeing
1st-best month of the year
6.9
Beach & pool
2nd-best month of the year

September is one of the better times to visit Topeka for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Topeka in September

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

In September, Topeka sees daytime highs around 79°F and nights near 59°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Topeka in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Topeka peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 10Dec 20UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May7High
Jun10Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Topeka 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 Topeka is worst in April — around 28 µg/m³ PM2.5 (moderate), about 4.6× the cleanest month (October, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodApr 1526 µg/m³Oct 236 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar15Moderate
Apr28Moderate
May11Good
Jun12Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct6Good
Nov7Good
Dec8Good
Location & terrain

Where is Topeka?

Topeka sits at 39.0°N, 95.7°W, 945 ft above sea level, in United States. The nearest listed city is Lawrence, 24 mi away.

Topography around Topeka

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

Within 2 miles, the terrain around Topeka has only modest variations in elevation — a maximum elevation change of 171 ft around an average of 922 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 377 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 876 ft.

The land around Topeka is covered by trees (46%) and artificial surfaces (37%) within 2 miles, trees (36%), grassland (35%) and cropland (20%) within 10 miles, and grassland (48%), cropland (29%) and trees (20%) within 50 miles.

2 miles
171 ft
10 miles
377 ft
50 miles
876 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Lawrence 24 mi · Gardner 43 mi · Leavenworth 44 mi · Olathe 48 mi · Manhattan 49 mi · Lenexa 51 mi · Shawnee 52 mi · Emporia 52 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 Topeka (39.0483°, -95.678°, elevation 945 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).