Hilliard weather in September

In September, Hilliard sees average daytime highs of 76°F and overnight lows near 56°F, with 2.8 in of rain across 8.2 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 80°F in the first days to 72°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 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 Hilliard's 1st-clearest and 10th-windiest month. For the whole year in context, see Hilliard's year-round climate.

Daytime high
76°
4th warmest
Overnight low
56°
9th coldest
Rainfall
2.8 in
8.2 wet days
Daylight
12 h 18 min
6:19 AM – 6:35 PM
Cloud cover
51%
1st clearest
Wind
7 mph
10th windiest
Solar energy
4.5 kWh/m²
Travel score
7.1
out of 10

Hilliard is city in Franklin County, Ohio, United States.

Density
972/km²
people per km²
Founded
1853

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 80°F in the first days to 72°F by the end.

A typical September day in Hilliard reaches about 76°F in the afternoon and slips back to 56°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 86°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)
18062
28062
38061
48061
58061
67960
77960
87960
97859
107859
117858
127758
137758
147757
157657
167656
177656
187556
197555
207555
217455
227454
237454
247353
257353
267253
277252
287252
297151
307151

How September really feels in Hilliard

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.

Hilliard 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
Jan36° / 22°3.110.34.89.50.0
Feb40° / 24°2.69.14.410.40.1
Mar50° / 32°3.711.42.611.72.1
Apr62° / 43°4.512.30.5134.9
May71° / 53°4.513.3014.26.1
Jun80° / 62°4.111.9014.86.2
Jul83° / 66°3.511.2014.65.7
Aug82° / 64°3.09.7013.66.4
Sep76° / 56°2.88.2012.37.1
Oct64° / 45°2.990.210.95.8
Nov51° / 35°3.19.11.19.82.5
Dec40° / 28°3.39.83.19.20.2

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 18% of September, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65842
75941
85842
95842
105941
115842
125842
135842
145842
155743
165842
175842
185743
195743
205743
215743
225743
235743
245842
255842
265743
275743
285743
295644
305644

Chance of precipitation in September

Any precipitation

Hilliard gets around 2.8 in of rain over 8.2 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
428
528
627
727
826
926
1026
1126
1226
1326
1426
1526
1626
1727
1827
1927
2027
2128
2228
2328
2428
2528
2628
2728
2828
2928
3027

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1232422256
2242522246
3252521235
4272521225
5292520214
6312520204
7322619194
8342619183
9362619173
10382618162
11392618152
12412518142
13432517131
14442517131
15462416121
16482416111
17502316101
18512315101
1954221590
2057211480
2158211470
2260201370
2362191360
2463191260
2564181260
2666181150
2767171150
2867171150
2969161050
3071151040

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:05 AM to 6:33 AM, and sunset from 7:00 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:057:00
212.96:066:58
312.86:066:57
412.86:076:55
512.86:086:54
612.76:096:52
712.76:106:50
812.66:116:48
912.66:126:47
1012.56:136:45
1112.56:146:43
1212.46:156:42
1312.46:166:40
1412.36:176:38
1512.36:186:36
1612.36:196:35
1712.26:206:33
1812.26:216:31
1912.16:226:30
2012.16:236:28
2112.06:246:26
2212.06:256:24
2311.96:266:23
2411.96:276:21
2511.96:286:19
2611.86:296:18
2711.86:306:16
2811.76:316:14
2911.76:326:12
3011.66:336:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.5 kWh/m².

For context, solar energy here swings from a low near 1.63 kWh/m² to a high of 6.24 kWh/m² in June across the year — September's 4.5 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Hilliard?

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
6.1
Beach & pool
4th-best month of the year

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

What to pack for Hilliard in September

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

In September, Hilliard sees daytime highs around 76°F and nights near 56°F. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Hilliard 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 Hilliard peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 21UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Hilliard 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 Hilliard is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1117 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar11Good
Apr12Good
May14Moderate
Jun17Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Hilliard?

Hilliard sits at 40.0°N, 83.2°W, 935 ft above sea level, in United States. The nearest listed city is Dublin, 5.0 mi away.

Topography around Hilliard

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

Within 2 miles, the terrain around Hilliard has only modest variations in elevation — a maximum elevation change of 154 ft around an average of 925 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 518 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,007 ft.

The land around Hilliard is covered by grassland (35%), artificial surfaces (30%) and trees (24%) within 2 miles, trees (30%), cropland (27%) and grassland (21%) within 10 miles, and cropland (56%) and trees (26%) within 50 miles.

2 miles
154 ft
10 miles
518 ft
50 miles
1,007 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Dublin 5.0 mi · Upper Arlington 5.6 mi · Columbus 9.9 mi · Grove City 11 mi · Westerville 14 mi · Gahanna 15 mi · Whitehall 15 mi · Marysville 18 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 Hilliard (40.0334°, -83.1582°, elevation 935 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).