Pocatello weather in September

In September, Pocatello sees average daytime highs of 74°F and overnight lows near 48°F, with 1.2 in of precipitation across 5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 68°F by the end. The sky is clear or mostly clear about 58% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Pocatello's 3rd-clearest and 10th-windiest month. For the whole year in context, see Pocatello's year-round climate.

Daytime high
74°
4th warmest
Overnight low
48°
9th coldest
Precipitation
1.2 in
5 wet days
Daylight
12 h 18 min
6:15 AM – 6:33 PM
Cloud cover
35%
3rd clearest
Wind
5 mph
10th windiest
Solar energy
5.44 kWh/m²
Travel score
7.9
out of 10

Pocatello is city in Bannock and Power counties in Idaho, United States, that is the county seat of Bannock County.

Density
649/km²
people per km²
Founded
1889

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 79°F in the first days to 68°F by the end.

A typical September day in Pocatello reaches about 74°F in the afternoon and slips back to 48°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 84°F. Set against its neighbours, September runs about 11°F cooler than August and about 15°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18053
28053
37952
47952
57851
67851
77751
87750
97650
107649
117549
127549
137448
147448
157448
167347
177347
187247
197246
207246
217146
227146
237045
247045
257045
266944
276944
286844
296843
306743

How September really feels in Pocatello

Once humidity and wind are folded in, September 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

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

Pocatello weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan30° / 17°2.010.911.19.20.0
Feb35° / 21°1.69.38.510.20.0
Mar45° / 28°1.910.66.911.61.1
Apr55° / 34°2.111.43.413.13.3
May65° / 42°2.310.20.814.45.8
Jun75° / 49°1.26.30.215.17.5
Jul86° / 58°0.64.2014.86.2
Aug84° / 56°0.84.4013.86.6
Sep74° / 48°1.250.112.37.9
Oct59° / 37°1.46.61.610.85.0
Nov43° / 26°1.68.25.89.50.8
Dec31° / 17°2.010.510.98.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18020
27921
37822
47822
57723
67723
77723
87624
97525
107525
117525
127426
137327
147228
157228
167129
177129
187129
197129
207129
217129
227129
237129
247129
257228
267129
277129
287129
297129
307030

Chance of precipitation in September

Any precipitationSnow

Pocatello gets around 1.2 in of rain and snow over 5 wet days in September. 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 19% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202530
Rain chance (%)Snow chance (%)
1150
2150
3150
4150
5150
6160
7160
8160
9170
10170
11170
12180
13180
14180
15180
16180
17170
18170
19170
20170
21170
22171
23171
24171
25171
26171
27182
28182
29182
30192

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 5 mph in September.

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

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:59 AM to 6:31 AM, and sunset from 7:00 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:597:00
213.06:006:58
312.96:016:57
412.96:026:55
512.86:036:53
612.86:046:51
712.76:056:49
812.76:076:48
912.66:086:46
1012.66:096:44
1112.56:106:42
1212.56:116:40
1312.46:126:38
1412.46:136:36
1512.36:146:35
1612.36:156:33
1712.26:176:31
1812.26:186:29
1912.16:196:27
2012.16:206:25
2112.06:216:23
2212.06:226:22
2311.96:236:20
2411.96:256:18
2511.86:266:16
2611.86:276:14
2711.76:286:12
2811.76:296:10
2911.66:306:09
3011.66:316:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.44 kWh/m².

For context, solar energy here swings from a low near 1.86 kWh/m² to a high of 7.91 kWh/m² in July across the year — September's 5.44 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Bright
75.9Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.4Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
254.9Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Pocatello?

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

7.9
Sightseeing
1st-best month of the year
5.9
Beach & pool
4th-best month of the year

September is one of the better times to visit Pocatello for general sightseeing.

What to pack for Pocatello in September

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

In September, Pocatello sees daytime highs around 74°F and nights near 48°F. Worth packing: light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Pocatello in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pocatello peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateLowJul 10UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr5Moderate
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Pocatello in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Pocatello is worst in August — around 22 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1721 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar12Good
Apr11Good
May10Good
Jun10Good
Jul13Moderate
Aug22Moderate
Sep13Moderate
Oct9Good
Nov9Good
Dec8Good
Location & terrain

Where is Pocatello?

Pocatello sits at 42.9°N, 112.4°W, 4,462 ft above sea level, in United States. The nearest listed city is Idaho Falls, 46 mi away.

Topography around Pocatello

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

Within 2 miles, the terrain around Pocatello has significant variations in elevation — a maximum elevation change of 833 ft around an average of 4,596 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,923 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,033 ft.

The land around Pocatello is covered by artificial surfaces (42%) and grassland (31%) within 2 miles, grassland (51%) within 10 miles, and grassland (62%) within 50 miles.

2 miles
833 ft
10 miles
2,923 ft
50 miles
5,033 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Idaho Falls 46 mi · Conda 47 mi · Rexburg 74 mi · Logan 85 mi · Brigham City 96 mi · Twin Falls 104 mi · North Ogden 111 mi · Ogden 116 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 Pocatello (42.8713°, -112.4455°, elevation 4,462 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).