Lawrence weather in September

In September, Lawrence sees average daytime highs of 79°F and overnight lows near 59°F, with 3.6 in of rain across 8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 74°F by the end. The sky is clear or mostly clear about 50% 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 Lawrence's 1st-clearest and 10th-windiest month. For the whole year in context, see Lawrence's year-round climate.

Daytime high
79°
4th warmest
Overnight low
59°
9th coldest
Rainfall
3.6 in
8 wet days
Daylight
12 h 18 min
6:08 AM – 6:23 PM
Cloud cover
43%
1st clearest
Wind
7 mph
10th windiest
Solar energy
4.87 kWh/m²
Travel score
7.1
out of 10

Lawrence is city in and county seat of Douglas County, Kansas, United States.

Density
1,058/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 83°F in the first days to 74°F by the end.

A typical September day in Lawrence reaches about 79°F in the afternoon and slips back to 59°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 89°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)
18465
28465
38364
48364
58364
68263
78263
88162
98162
108162
118061
128061
137960
147960
157860
167859
177859
187758
197758
207757
217657
227656
237656
247656
257555
267555
277454
287454
297454
307353

How September really feels in Lawrence

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.

Lawrence weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 22°1.35.53.19.60.0
Feb44° / 26°1.75.82.710.50.8
Mar55° / 35°2.98.91.811.73.6
Apr65° / 46°4.6110.4135.7
May74° / 56°6.012.40.114.16.4
Jun84° / 66°5.011.6014.75.5
Jul88° / 70°3.69.5014.54.7
Aug86° / 68°4.08.8013.55.2
Sep79° / 59°3.68012.37.1
Oct67° / 47°3.280.1116.6
Nov53° / 36°2.15.90.99.93.5
Dec42° / 26°1.75.22.39.30.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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
26733
36634
46634
56634
66535
76535
86535
96535
106436
116436
126238
136238
146238
156238
166139
176139
186238
196337
206337
216436
226535
236634
246733
256733
266931
276931
286931
297030
307030

Chance of precipitation in September

Any precipitation

Lawrence gets around 3.6 in of rain over 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
428
528
628
728
828
928
1029
1129
1229
1330
1430
1530
1630
1730
1829
1929
2028
2128
2227
2326
2426
2525
2625
2724
2824
2924
3024

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1915234112
21115243911
31316243710
4141724359
5161824339
6181924318
7202023307
8222023287
9242122276
10262122266
11272221255
12292220245
13312220234
14322219224
15342219224
16362218213
17382117203
18402117203
19422116193
20442015183
21462015172
22491914162
23511914142
24541813132
25561713122
26571713112
27601612102
28611612101
2962161291
3064161181

Wind in September

Winds average 7 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.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177light breeze
187light breeze
197light 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 5:54 AM to 6:21 AM, and sunset from 6:47 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:546:47
212.95:556:46
312.85:566:44
412.85:576:43
512.75:586:41
612.75:596:39
712.65:596:38
812.66:006:36
912.66:016:34
1012.56:026:33
1112.56:036:31
1212.46:046:29
1312.46:056:28
1412.36:066:26
1512.36:076:24
1612.36:086:23
1712.26:096:21
1812.26:106:19
1912.16:116:18
2012.16:116:16
2112.06:126:14
2212.06:136:13
2311.96:146:11
2411.96:156:09
2511.96:166:08
2611.86:176:06
2711.86:186:04
2811.76:196:03
2911.76:206:01
3011.66:216:00

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.87 kWh/m².

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 6.59 kWh/m² in July across the year — September's 4.87 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.6Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.4Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Lawrence?

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
6.7
Beach & pool
3rd-best month of the year

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

What to pack for Lawrence in September

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

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

light clothesrain gearsun protection

UV index in Lawrence 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 Lawrence peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 22UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May7High
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Lawrence 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 Lawrence is worst in April — around 16 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodApr 1416 µg/m³Oct 237 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr16Moderate
May12Good
Jun13Moderate
Jul15Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec8Good
Location & terrain

Where is Lawrence?

Lawrence sits at 39.0°N, 95.2°W, 863 ft above sea level, in United States. The nearest listed city is Gardner, 20 mi away.

Topography around Lawrence

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

Within 2 miles, the terrain around Lawrence has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 873 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 381 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 863 ft.

The land around Lawrence is covered by trees (44%) and artificial surfaces (26%) within 2 miles, trees (35%), grassland (31%) and cropland (25%) within 10 miles, and grassland (38%), trees (29%) and cropland (28%) within 50 miles.

2 miles
285 ft
10 miles
381 ft
50 miles
863 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Gardner 20 mi · Olathe 23 mi · Topeka 24 mi · Lenexa 27 mi · Shawnee 28 mi · Leavenworth 29 mi · Overland Park 30 mi · Prairie Village 32 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 Lawrence (38.9717°, -95.2352°, elevation 863 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).