Lima weather in September

In September, Lima sees average daytime highs of 75°F and overnight lows near 56°F, with 2.6 in of rain across 8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 71°F by the end. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Lima's 1st-clearest and 10th-windiest month. For the whole year in context, see Lima's year-round climate.

Daytime high
75°
4th warmest
Overnight low
56°
9th coldest
Rainfall
2.6 in
8 wet days
Daylight
12 h 18 min
6:23 AM – 6:39 PM
Cloud cover
52%
1st clearest
Wind
8 mph
10th windiest
Solar energy
4.46 kWh/m²
Travel score
7.2
out of 10

Lima is city in and county seat of Allen County, Ohio, United States.

Density
1,060/km²
people per km²
Founded
1831

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 79°F in the first days to 71°F by the end.

A typical September day in Lima reaches about 75°F in the afternoon and slips back to 56°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 65°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)
17961
27961
37960
47960
57860
67860
77859
87859
97758
107758
117758
127657
137657
147656
157656
167556
177555
187455
197455
207454
217354
227353
237353
247253
257252
267252
277152
287151
297051
307051

How September really feels in Lima

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.

Lima weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan34° / 21°2.910.45.99.40.0
Feb38° / 23°2.494.910.40.0
Mar48° / 31°3.411.13.411.71.7
Apr61° / 42°4.312.70.813.14.6
May71° / 52°4.213.3014.26.0
Jun79° / 62°4.011.8014.96.3
Jul82° / 65°3.411.1014.66.0
Aug81° / 63°3.39.9013.66.6
Sep75° / 56°2.68012.37.2
Oct63° / 45°2.89.10.210.95.6
Nov50° / 35°3.19.21.49.72.3
Dec39° / 26°2.9104.29.10.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65941
75842
85743
95644
105644
115644
125644
135446
145446
155446
165446
175347
185347
195446
205446
215446
225347
235446
245446
255446
265446
275347
285347
295347
305347

Chance of precipitation in September

Any precipitation

Lima gets around 2.6 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
626
726
825
925
1025
1125
1225
1325
1426
1526
1626
1726
1827
1927
2027
2127
2228
2328
2428
2529
2629
2729
2829
2929
3028

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1252522235
2262522225
3282522214
4302521204
5312521193
6332520183
7352520173
8372520162
9392519152
10412519141
11432418141
12442417131
13462417130
14482416120
15512315110
16512315110
17542214100
1857211390
1957211390
2060201280
2162191270
2264181170
2365181160
2467171060
2567171060
2669161050
277016950
287115950
297214950
307414840

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
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157light 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 13 hours 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 84 minutes over September. Sunrise moves from 6:08 AM to 6:37 AM, and sunset from 7:05 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:087:05
212.96:097:03
312.96:107:01
412.86:117:00
512.86:126:58
612.76:136:56
712.76:146:54
812.66:156:53
912.66:166:51
1012.56:176:49
1112.56:186:48
1212.56:196:46
1312.46:206:44
1412.46:216:42
1512.36:226:40
1612.36:236:39
1712.26:246:37
1812.26:256:35
1912.16:266:33
2012.16:276:32
2112.06:286:30
2212.06:296:28
2311.96:306:26
2411.96:316:25
2511.86:326:23
2611.86:336:21
2711.86:346:19
2811.76:356:18
2911.76:366:16
3011.66:376:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.46 kWh/m².

For context, solar energy here swings from a low near 1.61 kWh/m² to a high of 6.28 kWh/m² in June across the year — September's 4.46 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Lima?

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

7.2
Sightseeing
1st-best month of the year
5.9
Beach & pool
4th-best month of the year

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

What to pack for Lima in September

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

In September, Lima sees daytime highs around 75°F and nights near 56°F. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

UV index in Lima in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lima peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateLowJun 19UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec1Low

Air quality in Lima 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 Lima is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1217 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Lima?

Lima sits at 40.7°N, 84.1°W, 879 ft above sea level, in United States. The nearest listed city is Findlay, 32 mi away.

Topography around Lima

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

Within 2 miles, the terrain around Lima has only modest variations in elevation — a maximum elevation change of 295 ft around an average of 873 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 466 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 988 ft.

The land around Lima is covered by artificial surfaces (37%), trees (35%) and grassland (23%) within 2 miles, cropland (61%) within 10 miles, and cropland (81%) within 50 miles.

2 miles
295 ft
10 miles
466 ft
50 miles
988 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Findlay 32 mi · Sidney 32 mi · Defiance 40 mi · Piqua 42 mi · Troy 49 mi · Bowling Green 50 mi · Marysville 52 mi · Marion 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 Lima (40.7426°, -84.1052°, elevation 879 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).