Rexburg weather in August

In August, Rexburg sees average daytime highs of 84°F and overnight lows near 54°F, with 0.6 in of rain across 3.4 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 81°F by the end. The sky is clear or mostly clear about 64% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Rexburg's 2nd-clearest and 7th-windiest month. For the whole year in context, see Rexburg's year-round climate.

Daytime high
84°
2nd warmest
Overnight low
54°
11th coldest
Rainfall
0.6 in
3.4 wet days
Daylight
13 h 48 min
5:36 AM – 7:26 PM
Cloud cover
32%
2nd clearest
Wind
6 mph
7th windiest
Solar energy
6.95 kWh/m²
Travel score
6.9
out of 10

Rexburg is city in and county seat of Madison County, Idaho, United States.

Density
1,092/km²
people per km²
Founded
1883

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 86°F in the first days to 81°F by the end.

A typical August day in Rexburg reaches about 84°F in the afternoon and slips back to 54°F overnight — a 30°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 91°F. Set against its neighbours, August runs about 1°F cooler than July and about 11°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18756
28656
38656
48656
58656
68656
78656
88656
98556
108555
118555
128555
138555
148555
158555
168455
178455
188454
198454
208354
218354
228354
238353
248253
258253
268253
278253
288152
298152
308052
318051

How August really feels in Rexburg

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.

Rexburg weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan30° / 15°1.710.711.79.10.0
Feb35° / 19°1.38.78.210.20.0
Mar45° / 27°1.69.74.911.61.1
Apr55° / 33°2.111.93.113.23.4
May65° / 41°2.410.30.614.55.8
Jun75° / 48°1.56.70.115.27.4
Jul85° / 55°0.53014.96.4
Aug84° / 54°0.63.4013.86.9
Sep73° / 46°1.14.30.112.37.9
Oct58° / 36°1.57.11.210.84.7
Nov42° / 24°1.48.76.59.50.6
Dec31° / 15°1.810.3118.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 17%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18218
28218
38218
48218
58218
68218
78317
88317
98317
108317
118416
128416
138515
148515
158515
168515
178515
188515
198515
208515
218515
228416
238416
248317
258218
268218
278119
288119
298119
308020
318020

Chance of precipitation in August

Any precipitation

Rexburg gets around 0.6 in of rain over 3.4 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 11% and peaks near 13% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
111
211
311
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
1610
1710
1810
1911
2011
2111
2211
2312
2412
2512
2612
2712
2812
2912
3013
3113

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in August

Winds average 6 mph in August.

Across August, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
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
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 30 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over August. Sunrise moves from 5:20 AM to 5:54 AM, and sunset from 7:47 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:207:47
214.45:217:46
314.45:227:44
414.35:237:43
514.35:247:42
614.35:257:41
714.25:267:39
814.25:277:38
914.15:287:36
1014.15:307:35
1114.05:317:34
1214.05:327:32
1314.05:337:31
1413.95:347:29
1513.95:357:28
1613.85:367:26
1713.85:387:24
1813.75:397:23
1913.75:407:21
2013.65:417:20
2113.65:427:18
2213.55:437:16
2313.55:457:15
2413.55:467:13
2513.45:477:11
2613.45:487:09
2713.35:497:08
2813.35:507:06
2913.25:527:04
3013.25:537:02
3113.15:547:00

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.95 kWh/m².

For context, solar energy here swings from a low near 1.65 kWh/m² to a high of 7.95 kWh/m² in July across the year — August's 6.95 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.4Intense
47.4Intense
57.4Intense
67.3Intense
77.3Intense
87.3Intense
97.2Intense
107.2Intense
117.2Intense
127.1Intense
137.1Intense
147.1Intense
157.0Intense
167.0Intense
177.0Intense
186.9Intense
196.9Intense
206.8Intense
216.8Intense
226.7Intense
236.7Intense
246.6Intense
256.6Intense
266.5Intense
276.5Intense
286.4Intense
296.3Intense
306.3Intense
316.2Intense
Planning a trip in August

Is August a good time to visit Rexburg?

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

6.9
Sightseeing
3rd-best month of the year
8.3
Beach & pool
2nd-best month of the year

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

What to pack for Rexburg in August

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

In August, Rexburg sees daytime highs around 84°F and nights near 54°F. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Rexburg 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 Rexburg peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 13UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr5Moderate
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec2Low

Air quality in Rexburg 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 Rexburg is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1420 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May10Good
Jun9Good
Jul17Moderate
Aug20Moderate
Sep14Moderate
Oct9Good
Nov9Good
Dec7Good
Location & terrain

Where is Rexburg?

Rexburg sits at 43.8°N, 111.8°W, 4,865 ft above sea level, in United States. The nearest listed city is Idaho Falls, 28 mi away.

Topography around Rexburg

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

Within 2 miles, the terrain around Rexburg has only modest variations in elevation — a maximum elevation change of 394 ft around an average of 4,911 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 955 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,753 ft.

The land around Rexburg is covered by cropland (33%), artificial surfaces (27%) and grassland (24%) within 2 miles, cropland (63%) and grassland (25%) within 10 miles, and grassland (46%) and trees (29%) within 50 miles.

2 miles
394 ft
10 miles
955 ft
50 miles
8,753 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Idaho Falls 28 mi · Pocatello 74 mi · Conda 77 mi · Bozeman 133 mi · Logan 144 mi · Butte 155 mi · Twin Falls 160 mi · Brigham City 160 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 Rexburg (43.826°, -111.7897°, elevation 4,865 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).