Kalispell weather in August

In August, Kalispell sees average daytime highs of 78°F and overnight lows near 50°F, with 1.2 in of precipitation across 5 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 80°F in the first days to 74°F by the end. The sky is clear or mostly clear about 54% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Kalispell's 2nd-clearest and 9th-windiest month. For the whole year in context, see Kalispell's year-round climate.

Daytime high
78°
1st warmest
Overnight low
50°
12th coldest
Precipitation
1.2 in
5 wet days
Daylight
14 h 06 min
5:37 AM – 7:45 PM
Cloud cover
39%
2nd clearest
Wind
3 mph
9th windiest
Solar energy
6.23 kWh/m²
Travel score
7.9
out of 10

Kalispell is seat of Flathead County, Montana, United States.

Density
726/km²
people per km²

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 80°F in the first days to 74°F by the end.

A typical August day in Kalispell reaches about 78°F in the afternoon and slips back to 50°F overnight — a 28°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 88°F. Set against its neighbours, August runs on par with July and about 11°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18051
28051
38051
48051
58051
68051
78051
88051
97951
107951
117951
127951
137951
147851
157850
167850
177850
187750
197750
207749
217649
227649
237649
247649
257549
267548
277548
287448
297448
307447
317347

How August really feels in Kalispell

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.

Kalispell weather by month

How August compares with the rest of the year at a glance. August 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
Jan29° / 17°2.71414.38.60.0
Feb33° / 18°2.111.211.49.90.0
Mar40° / 23°2.614.210.111.60.2
Apr50° / 30°2.714.15.313.42.1
May60° / 38°3.013.71.214.94.5
Jun67° / 45°3.512.10.415.85.9
Jul77° / 50°1.25.7015.57.8
Aug78° / 50°1.250.114.17.9
Sep66° / 43°1.87.10.112.46.6
Oct51° / 34°2.611.92.810.62.6
Nov38° / 26°3.014.110.690.0
Dec30° / 19°2.713.414.18.20.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18020
27921
37822
47822
57723
67723
77624
87525
97525
107426
117426
127426
137327
147327
157327
167228
177228
187228
197129
207030
217030
227030
236931
246832
256832
266733
276733
286634
296634
306535
316535

Chance of precipitation in August

Any precipitation

Kalispell gets around 1.2 in of rain and snow over 5 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 17% and peaks near 18% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
115
216
316
416
517
617
717
818
918
1018
1118
1218
1318
1418
1518
1617
1717
1817
1916
2016
2116
2215
2315
2415
2515
2615
2715
2816
2916
3017
3118

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

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1946
2946
3955
4955
5955
6955
7964
8964
9964
10964
11973
12973
13973
14982
15982
16982
17982
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in August

Winds average 3 mph in August.

Across August, daily wind ranges from about 3 mph on the calmest days to 3 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 54 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over August. Sunrise moves from 5:17 AM to 5:58 AM, and sunset from 8:10 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.95:178:10
214.85:188:08
314.85:198:07
414.75:218:05
514.75:228:04
614.65:248:02
714.65:258:01
814.55:267:59
914.55:287:58
1014.45:297:56
1114.45:307:54
1214.35:327:52
1314.35:337:51
1414.25:347:49
1514.25:367:47
1614.15:377:45
1714.15:397:44
1814.05:407:42
1914.05:417:40
2013.95:437:38
2113.95:447:36
2213.85:467:34
2313.85:477:32
2413.75:497:30
2513.65:507:28
2613.65:517:26
2713.55:537:24
2813.55:547:22
2913.45:567:20
3013.45:577:18
3113.35:587:16

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.23 kWh/m².

For context, solar energy here swings from a low near 1.01 kWh/m² to a high of 7.27 kWh/m² in July across the year — August's 6.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
17.0Intense
26.9Intense
36.9Intense
46.8Intense
56.8Intense
66.7Intense
76.7Intense
86.6Intense
96.6Intense
106.5Intense
116.5Intense
126.4Intense
136.4Intense
146.3Intense
156.3Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.0Intense
216.0Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.7Bright
275.6Bright
285.6Bright
295.5Bright
305.5Bright
315.4Bright
Planning a trip in August

Is August a good time to visit Kalispell?

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

7.9
Sightseeing
1st-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Kalispell in August

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

In August, Kalispell sees daytime highs around 78°F and nights near 50°F. Pack sun protection. Worth having: light clothes. About 5 days see rain.

sun protectionlight clothes

UV index in Kalispell in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kalispell peaks around July 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 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 18UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Kalispell 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 Kalispell is worst in August — around 44 µg/m³ PM2.5 (poor), about 10.8× the cleanest month (December, 4 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodAug 1942 µg/m³Dec 204 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb6Good
Mar8Good
Apr10Good
May10Good
Jun9Good
Jul15Moderate
Aug44Poor
Sep31Moderate
Oct12Good
Nov7Good
Dec4Good
Location & terrain

Where is Kalispell?

Kalispell sits at 48.2°N, 114.3°W, 2,956 ft above sea level, in United States. The nearest listed city is Whitefish, 15 mi away.

Topography around Kalispell

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

Within 2 miles, the terrain around Kalispell has only modest variations in elevation — a maximum elevation change of 804 ft around an average of 2,969 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,900 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,871 ft.

The land around Kalispell is covered by grassland (36%), trees (30%) and artificial surfaces (29%) within 2 miles, trees (38%), grassland (35%) and cropland (21%) within 10 miles, and trees (73%) within 50 miles.

2 miles
804 ft
10 miles
2,900 ft
50 miles
7,871 ft
treesgrasslandcroplandartificial surfacesbare terrainwatermoss and lichen
August weather nearby: Whitefish 15 mi · Missoula 93 mi · Cranbrook 112 mi · Coeur d'Alene 120 mi · Lethbridge 124 mi · Post Falls 127 mi · Spokane Valley 140 mi · Opportunity 140 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 Kalispell (48.1958°, -114.3129°, elevation 2,956 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).