Helena weather in July

In July, Helena sees average daytime highs of 78°F and overnight lows near 50°F, with 1.7 in of rain across 8.8 wet days and about 15.2 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 75°F in the first days to 81°F by the end. The sky is clear or mostly clear about 54% of the time in July, and the air most often feels dry.

Daylight stretches from about 15 h 36 min at the start of July to 14 h 48 min by month's end. Set against the rest of the year, July is Helena's 1st-clearest and 11th-windiest month. For the whole year in context, see Helena's year-round climate.

Daytime high
78°
1st warmest
Overnight low
50°
12th coldest
Rainfall
1.7 in
8.8 wet days
Daylight
15 h 18 min
4:55 AM – 8:12 PM
Cloud cover
40%
1st clearest
Wind
4 mph
11th windiest
Solar energy
7.45 kWh/m²
Travel score
7.2
out of 10

Helena is capital city of the U.S. state of Montana and seat of Lewis and Clark County.

Density
749/km²
people per km²
Founded
1864

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 75°F in the first days to 81°F by the end.

A typical July day in Helena reaches about 78°F in the afternoon and slips back to 50°F overnight — a 29°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 88°F. Set against its neighbours, July runs about 11°F warmer than June and on par with August.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17447
27448
37548
47548
57648
67649
77649
87749
97749
107749
117849
127849
137850
147950
157950
167950
177950
188050
198051
208051
218051
228051
238051
248051
258151
268151
278151
288151
298151
308151
318151

How July really feels in Helena

Once humidity and wind are folded in, July 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

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

Helena weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 12°0.977.68.80.0
Feb31° / 13°0.977.6100.0
Mar39° / 20°1.49.77.711.60.1
Apr48° / 28°2.411.97.213.31.7
May59° / 37°3.213.82.714.84.0
Jun67° / 44°3.813.50.615.65.7
Jul78° / 50°1.78.8015.27.2
Aug78° / 49°1.57.50.1147.4
Sep67° / 42°1.66.80.912.46.7
Oct52° / 32°1.58.33.810.72.9
Nov37° / 21°1.27.76.29.20.1
Dec27° / 12°1.17.37.88.40.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26832
36832
46931
56931
67030
77129
87129
97228
107327
117426
127525
137525
147624
157624
167723
177822
187822
197822
207921
217921
228020
238020
248020
258020
268020
278020
287921
297921
307921
317921

Chance of precipitation in July

Any precipitation

Helena gets around 1.7 in of rain over 8.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
237
337
437
536
636
735
834
933
1032
1131
1230
1329
1428
1527
1626
1725
1825
1924
2024
2124
2223
2323
2423
2523
2623
2723
2823
2923
3023
3124

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1991
2991
3991
4982
5982
6982
7973
8973
9973
10973
11964
12964
13964
14964
15964
16964
17973
18973
19973
20973
21973
22973
23982
24982
25982
26982
27982
28982
29982
30982
31982

Wind in July

Winds average 4 mph in July.

Across July, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 36 min at the start of July to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over July. Sunrise moves from 4:44 AM to 5:11 AM, and sunset from 8:19 PM to 7:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.64:448:19
215.64:448:19
315.64:458:19
415.64:458:19
515.54:468:18
615.54:478:18
715.54:478:18
815.54:488:17
915.54:498:17
1015.44:508:16
1115.44:518:16
1215.44:518:15
1315.44:528:15
1415.34:538:14
1515.34:548:13
1615.34:558:12
1715.34:568:12
1815.24:578:11
1915.24:588:10
2015.24:598:09
2115.15:008:08
2215.15:018:07
2315.15:028:06
2415.05:038:05
2515.05:048:04
2615.05:068:03
2714.95:078:02
2814.95:088:01
2914.85:098:00
3014.85:107:58
3114.85:117:57

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 7.45 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 7.45 kWh/m² in July across the year — July's 7.45 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.4Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.5Intense
97.5Intense
107.5Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.5Intense
197.5Intense
207.4Intense
217.4Intense
227.4Intense
237.4Intense
247.3Intense
257.3Intense
267.3Intense
277.3Intense
287.2Intense
297.2Intense
307.2Intense
317.1Intense
Planning a trip in July

Hazard calendar for Helena

In seasonPeak

None of Helena's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Helena's rainy season runs April–June, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Helena?

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

7.2
Sightseeing
2nd-best month of the year
6.8
Beach & pool
2nd-best month of the year

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

What to pack for Helena in July

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

In July, Helena sees daytime highs around 78°F and nights near 50°F. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

UV index in Helena 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 Helena peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 15UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar5Moderate
Apr5Moderate
May7High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Helena 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 Helena is worst in August — around 25 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1225 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar11Good
Apr11Good
May11Good
Jun9Good
Jul23Moderate
Aug25Moderate
Sep17Moderate
Oct8Good
Nov9Good
Dec8Good
Location & terrain

Where is Helena?

Helena sits at 46.6°N, 112.0°W, 4,058 ft above sea level, in United States. The nearest listed city is Butte, 47 mi away.

Topography around Helena

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

Within 2 miles, the terrain around Helena has significant variations in elevation — a maximum elevation change of 1,588 ft around an average of 4,219 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,481 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,729 ft.

The land around Helena is covered by artificial surfaces (45%), trees (28%) and grassland (25%) within 2 miles, grassland (53%) and trees (31%) within 10 miles, and grassland (53%) and trees (42%) within 50 miles.

2 miles
1,588 ft
10 miles
3,481 ft
50 miles
6,729 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Butte 47 mi · Great Falls 71 mi · Bozeman 79 mi · Missoula 94 mi · Kalispell 153 mi · Whitefish 165 mi · Billings 178 mi · Rexburg 191 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 Helena (46.5927°, -112.0361°, elevation 4,058 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).