Newton weather in August

In August, Newton sees average daytime highs of 81°F and overnight lows near 63°F, with 4.0 in of rain across 9.4 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 43% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Newton's 2nd-clearest and 12th-windiest month. For the whole year in context, see Newton's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
4.0 in
9.4 wet days
Daylight
13 h 42 min
5:25 AM – 7:07 PM
Cloud cover
49%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.64 kWh/m²
Travel score
6.7
out of 10

Newton is city in and the county seat of Jasper County, Iowa, United States.

Density
519/km²
people per km²
Founded
1850

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 81°F through the month.

A typical August day in Newton reaches about 81°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 89°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18264
28264
38264
48264
58264
68264
78264
88264
98163
108163
118163
128163
138163
148163
158163
168163
178163
188163
198162
208162
218162
228162
238162
248162
258162
268162
278162
288061
298061
308061
318061

How August really feels in Newton

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.

Newton weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 13°1.36.64.89.30.0
Feb34° / 17°1.66.64.710.30.0
Mar47° / 29°2.78.82.711.71.6
Apr60° / 40°4.411.2113.14.7
May71° / 52°5.413.50.114.36.0
Jun80° / 62°5.211.60156.3
Jul83° / 65°3.910014.76.0
Aug81° / 63°4.09.4013.76.7
Sep75° / 55°3.88.3012.37.2
Oct62° / 42°2.98.30.410.95.5
Nov47° / 30°2.26.91.69.61.7
Dec34° / 19°1.66.44.390.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36139
46040
56040
66040
76040
85941
95941
105941
115842
125842
135842
145941
155941
165941
175941
185941
195941
206040
216040
226139
236139
246238
256238
266337
276436
286436
296436
306634
316634

Chance of precipitation in August

Any precipitation

Newton gets around 4.0 in of rain over 9.4 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
331
431
531
631
731
831
932
1032
1132
1232
1332
1432
1532
1632
1731
1831
1931
2031
2130
2230
2329
2428
2528
2627
2726
2826
2925
3025
3125

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16183025191
27183026181
37183026181
47183026181
57182927171
68182927171
78182927161
89182928161
99182828161
1010182828151
1110182828151
1210182829141
1311182729141
1411182729141
1511182730131
1612192630131
1712192630121
1812192631121
1912192631121
2012192632111
2112192532110
2213192532110
2313202531110
2413202531110
2514202431100
2615212430100
2716212429100
2817212329100
291822232890
302022232790
312123222680

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, 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.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 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 78 minutes over August. Sunrise moves from 5:10 AM to 5:41 AM, and sunset from 7:26 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:107:26
214.25:117:25
314.25:127:24
414.25:137:23
514.15:147:22
614.15:157:21
714.15:167:19
814.05:177:18
914.05:187:17
1013.95:197:15
1113.95:207:14
1213.95:217:13
1313.85:227:11
1413.85:237:10
1513.75:247:09
1613.75:257:07
1713.75:277:06
1813.65:287:04
1913.65:297:03
2013.55:307:01
2113.55:316:59
2213.45:326:58
2313.45:336:56
2413.35:346:55
2513.35:356:53
2613.35:366:51
2713.25:376:50
2813.25:386:48
2913.15:396:46
3013.15:406:45
3113.05:416:43

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 1.78 kWh/m² to a high of 6.45 kWh/m² in July across the year — August's 5.64 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Bright
65.9Bright
75.9Bright
85.9Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in August

Is August a good time to visit Newton?

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

6.7
Sightseeing
2nd-best month of the year
6.9
Beach & pool
2nd-best month of the year

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

What to pack for Newton in August

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

In August, Newton sees daytime highs around 81°F and nights near 63°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Newton 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 Newton 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 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 19UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Newton 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 Newton is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 1916 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar14Moderate
Apr11Good
May12Good
Jun13Moderate
Jul16Moderate
Aug15Moderate
Sep12Good
Oct7Good
Nov9Good
Dec10Good
Location & terrain

Where is Newton?

Newton sits at 41.7°N, 93.0°W, 951 ft above sea level, in United States. The nearest listed city is Altoona, 22 mi away.

Topography around Newton

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

Within 2 miles, the terrain around Newton has only modest variations in elevation — a maximum elevation change of 200 ft around an average of 922 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 282 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 587 ft.

The land around Newton is covered by grassland (28%), cropland (26%) and trees (25%) within 2 miles, cropland (73%) within 10 miles, and cropland (68%) within 50 miles.

2 miles
200 ft
10 miles
282 ft
50 miles
587 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Altoona 22 mi · Marshalltown 25 mi · Ankeny 29 mi · Des Moines 30 mi · Johnston 34 mi · Urbandale 35 mi · West Des Moines 35 mi · Indianola 35 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 Newton (41.6997°, -93.048°, elevation 951 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).