Westfield weather in August

In August, Westfield sees average daytime highs of 82°F and overnight lows near 65°F, with 3.0 in of rain across 9.1 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Westfield's 2nd-clearest and 12th-windiest month. For the whole year in context, see Westfield's year-round climate.

Daytime high
82°
2nd warmest
Overnight low
65°
11th coldest
Rainfall
3.0 in
9.1 wet days
Daylight
13 h 36 min
6:01 AM – 7:36 PM
Cloud cover
54%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.64 kWh/m²
Travel score
6.6
out of 10

Westfield is city in Hamilton County, Indiana, USA.

Density
525/km²
people per km²
Founded
1834

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 82°F through the month.

A typical August day in Westfield reaches about 82°F in the afternoon and slips back to 65°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 89°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18366
28266
38266
48265
58265
68265
78265
88265
98265
108265
118265
128265
138265
148265
158265
168265
178265
188264
198264
208264
218264
228264
238264
248264
258264
268264
278264
288163
298163
308163
318163

How August really feels in Westfield

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Westfield weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan35° / 21°3.19.54.79.50.0
Feb39° / 24°2.58.74.310.40.1
Mar50° / 33°3.710.92.411.72.2
Apr62° / 44°4.6120.4135.0
May72° / 54°4.813.7014.26.0
Jun80° / 64°4.312.1014.86.1
Jul83° / 67°3.511.8014.65.6
Aug82° / 65°3.09.1013.66.6
Sep76° / 57°2.87.8012.37.2
Oct64° / 46°3.390.110.95.8
Nov50° / 35°3.49.21.19.82.4
Dec39° / 26°2.99.63.59.20.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55644
65644
75644
85545
95545
105545
115545
125446
135545
145545
155545
165644
175644
185644
195644
205644
215644
225743
235743
245743
255743
265743
275743
285842
295941
305941
315941

Chance of precipitation in August

Any precipitation

Westfield gets around 3.0 in of rain over 9.1 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
233
333
432
531
631
730
830
930
1030
1130
1229
1329
1429
1529
1628
1728
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2827
2927
3027
3127

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the muggy band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 41% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
18222525191
28222526181
38232526181
48232526171
59232526171
69232526161
710232526161
810232526151
910222526151
1011222526151
1111222526151
1211222526141
1311222427141
1411232427141
1511232527131
1611232527131
1711232527121
1811232527121
1911232527121
2011232528121
2111232628121
2211232628121
2312222628121
2412222628110
2513222628110
2614222627110
2715212627100
2817212627100
2918212526100
301921252690
312121252590

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, 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.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:46 AM to 6:15 AM, and sunset from 7:55 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:467:55
214.15:477:54
314.15:487:53
414.05:497:52
514.05:507:50
614.05:517:49
713.95:527:48
813.95:537:47
913.95:547:46
1013.85:557:44
1113.85:567:43
1213.85:577:42
1313.75:587:41
1413.75:597:39
1513.66:007:38
1613.66:017:36
1713.66:027:35
1813.56:037:34
1913.56:047:32
2013.46:057:31
2113.46:067:29
2213.46:077:28
2313.36:087:26
2413.36:097:25
2513.26:107:23
2613.26:117:22
2713.16:127:20
2813.16:137:18
2913.16:137:17
3013.06:147:15
3113.06:157:14

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.64 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.29 kWh/m² in June across the year — August's 5.64 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.4Bright
245.4Bright
255.4Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in August

Is August a good time to visit Westfield?

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

6.6
Sightseeing
2nd-best month of the year
7.0
Beach & pool
1st-best month of the year

August is a reasonable time to visit Westfield for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Westfield in August

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

In August, Westfield sees daytime highs around 82°F and nights near 65°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Westfield in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Westfield peaks around June 22 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 highHighModerateJun 22UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Westfield in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Westfield is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1416 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Moderate
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Westfield?

Westfield sits at 40.0°N, 86.1°W, 886 ft above sea level, in United States. The nearest listed city is Carmel, 4.3 mi away.

Topography around Westfield

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

Within 2 miles, the terrain around Westfield has only modest variations in elevation — a maximum elevation change of 157 ft around an average of 886 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 394 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 814 ft.

The land around Westfield is covered by grassland (35%), artificial surfaces (23%) and trees (22%) within 2 miles, cropland (34%), trees (29%) and grassland (23%) within 10 miles, and cropland (67%) and trees (20%) within 50 miles.

2 miles
157 ft
10 miles
394 ft
50 miles
814 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Carmel 4.3 mi · Noblesville 6.2 mi · Fishers 8.7 mi · Zionsville 9.3 mi · Broad Ripple 12 mi · Lawrence 15 mi · Lebanon 18 mi · Indianapolis 19 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 Westfield (40.0428°, -86.1275°, elevation 886 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).