Boise weather in July

In July, Boise sees average daytime highs of 92°F and overnight lows near 63°F, with 0.1 in of rain across 0.9 wet days and about 14.9 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 89°F in the first days to 94°F by the end. The sky is clear or mostly clear about 75% of the time in July, and the air most often feels dry.

Daylight stretches from about 15 h 12 min at the start of July to 14 h 30 min by month's end. Set against the rest of the year, July is Boise's 1st-clearest and 10th-windiest month. For the whole year in context, see Boise's year-round climate.

Daytime high
92°
1st warmest
Overnight low
63°
12th coldest
Rainfall
0.1 in
0.9 wet days
Daylight
14 h 54 min
5:22 AM – 8:19 PM
Cloud cover
23%
1st clearest
Wind
6 mph
10th windiest
Solar energy
8.03 kWh/m²
Travel score
4.4
out of 10

Boise is capital city of the U.S. state of Idaho and seat of Ada County.

Density
1/km²
people per km²
Founded
1863

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 89°F in the first days to 94°F by the end.

A typical July day in Boise reaches about 92°F in the afternoon and slips back to 63°F overnight — a 29°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 101°F. Set against its neighbours, July runs about 11°F warmer than June and about 1°F warmer than August.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
18860
28860
38960
48961
58961
69061
79061
89162
99162
109162
119162
129262
139263
149263
159263
169263
179363
189364
199364
209364
219364
229364
239464
249464
259464
269464
279465
289465
299465
309465
319464

How July really feels in Boise

Once humidity and wind are folded in, July averages 26 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
26
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Boise weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 27°1.89.54.89.10.0
Feb46° / 30°1.27.7310.21.2
Mar55° / 36°1.48.91.111.63.7
Apr63° / 41°1.27.20.313.25.8
May72° / 48°1.25.90.114.57.5
Jun81° / 55°0.63.2015.27.4
Jul92° / 63°0.10.9014.94.4
Aug91° / 62°0.10.7013.84.9
Sep80° / 54°0.42.2012.38.1
Oct65° / 43°0.94.30.110.86.8
Nov49° / 33°1.47.929.52.2
Dec39° / 27°2.010.15.28.80.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 12%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18515
28614
38713
48713
58713
68812
78812
88812
98812
108812
118812
128812
138812
148812
158812
168812
178812
188812
198812
208812
218812
228812
238812
248812
258812
268812
278812
288812
298812
308812
318812

Chance of precipitation in July

Any precipitation

Boise gets around 0.1 in of rain over 0.9 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
54
63
73
83
93
103
113
123
133
143
153
163
173
183
193
203
213
223
233
243
253
263
273
283
293
303
313

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July 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 (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
11991
12991
13991
14991
15991
16991
17991
18991
19982
20982
21982
22982
23982
24982
25982
26982
27982
28991
29991
30991
31991

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 6 mph on the calmest days to 6 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
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 12 min at the start of July to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 5:12 AM to 5:37 AM, and sunset from 8:24 PM to 8:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.25:128:24
215.25:128:24
315.25:138:24
415.25:138:24
515.25:148:24
615.15:158:24
715.15:158:23
815.15:168:23
915.15:178:23
1015.15:178:22
1115.15:188:22
1215.05:198:21
1315.05:208:21
1415.05:208:20
1515.05:218:19
1614.95:228:19
1714.95:238:18
1814.95:248:17
1914.95:258:17
2014.85:268:16
2114.85:278:15
2214.85:278:14
2314.75:288:13
2414.75:298:12
2514.75:308:12
2614.75:318:11
2714.65:328:10
2814.65:338:08
2914.55:358:07
3014.55:368:06
3114.55:378:05

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 8.03 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.66 kWh/m² to a high of 8.03 kWh/m² in July across the year — July's 8.03 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.1Intense
28.1Intense
38.1Intense
48.2Intense
58.2Intense
68.2Intense
78.2Intense
88.1Intense
98.1Intense
108.1Intense
118.1Intense
128.1Intense
138.1Intense
148.1Intense
158.1Intense
168.1Intense
178.0Intense
188.0Intense
198.0Intense
208.0Intense
217.9Intense
227.9Intense
237.9Intense
247.8Intense
257.8Intense
267.8Intense
277.8Intense
287.7Intense
297.7Intense
307.7Intense
317.6Intense
Planning a trip in July

Is July a good time to visit Boise?

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

4.4
Sightseeing
7th-best month of the year
8.0
Beach & pool
3rd-best month of the year

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

What to pack for Boise in July

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

In July, Boise sees daytime highs around 92°F and nights near 63°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Boise in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Boise peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 highHighModerateLowJul 13UV 9Dec 14UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May8Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Boise in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Boise is worst in August — around 45 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (December, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodAug 1742 µg/m³Dec 208 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May10Good
Jun8Good
Jul20Moderate
Aug45Poor
Sep21Moderate
Oct15Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Boise?

Boise sits at 43.6°N, 116.2°W, 2,700 ft above sea level, in United States. The nearest listed city is Meridian, 9.3 mi away.

Topography around Boise

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

Within 2 miles, the terrain around Boise has only modest variations in elevation — a maximum elevation change of 535 ft around an average of 2,756 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,003 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,516 ft.

The land around Boise is covered by trees (42%) and artificial surfaces (39%) within 2 miles, grassland (55%) and trees (21%) within 10 miles, and grassland (61%) and trees (20%) within 50 miles.

2 miles
535 ft
10 miles
4,003 ft
50 miles
7,516 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Meridian 9.3 mi · Eagle 9.3 mi · Kuna 14 mi · Nampa 19 mi · Caldwell 24 mi · Twin Falls 114 mi · Pendleton 191 mi · Elko 193 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 Boise (43.6135°, -116.2035°, elevation 2,700 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).