Holladay weather in September

In September, Holladay sees average daytime highs of 72°F and overnight lows near 47°F, with 1.8 in of precipitation across 6.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 77°F in the first days to 66°F by the end. The sky is clear or mostly clear about 62% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Holladay's 1st-clearest and 5th-windiest month. For the whole year in context, see Holladay's year-round climate.

Daytime high
72°
4th warmest
Overnight low
47°
9th coldest
Precipitation
1.8 in
6.5 wet days
Daylight
12 h 18 min
6:14 AM – 6:30 PM
Cloud cover
32%
1st clearest
Wind
4 mph
5th windiest
Solar energy
5.71 kWh/m²
Travel score
7.6
out of 10

Holladay is city in Salt Lake County, Utah, United States.

Density
1,404/km²
people per km²
Founded
1847

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 77°F in the first days to 66°F by the end.

A typical September day in Holladay reaches about 72°F in the afternoon and slips back to 47°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 82°F. Set against its neighbours, September runs about 10°F cooler than August and about 15°F warmer than October.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
17853
27852
37752
47752
57651
67651
77650
87550
97449
107449
117449
127348
137348
147247
157247
167146
177146
187146
197045
207045
216944
226944
236944
246843
256843
266743
276742
286642
296642
306541

How September really feels in Holladay

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.

Holladay weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 17°2.811.511.89.40.0
Feb36° / 21°2.310.310.410.40.0
Mar45° / 27°2.511.210.111.70.9
Apr51° / 31°3.112.79.313.12.4
May62° / 39°2.811.83.514.25.1
Jun74° / 48°1.56.50.414.97.6
Jul84° / 57°0.94.7014.66.7
Aug82° / 56°0.95.1013.67.2
Sep72° / 47°1.86.50.612.37.6
Oct57° / 35°2.28.33.810.94.6
Nov42° / 23°2.39.58.59.70.6
Dec32° / 16°2.610.110.39.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 21%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38218
48218
58218
68119
78119
88119
98119
108119
118020
127921
137921
147921
157921
167822
177822
187822
197822
207822
217822
227822
237723
247723
257624
267624
277624
287624
297525
307525

Chance of precipitation in September

Any precipitationSnow

Holladay gets around 1.8 in of rain and snow over 6.5 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 22% and peaks near 24% on the wettest days, and about 1 day brings snow.

0%10%20%30%151015202530
Rain chance (%)Snow chance (%)
1190
2190
3190
4200
5200
6210
7210
8210
9221
10221
11231
12231
13231
14232
15232
16232
17233
18233
19233
20223
21223
22224
23224
24224
25224
26234
27235
28235
29245
30246

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1982
2982
3982
4982
5991
6991
7991
8991
9991
10991
11991
12991
13991
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 4 mph in September.

Across September, 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.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min 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 78 minutes over September. Sunrise moves from 5:59 AM to 6:28 AM, and sunset from 6:55 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:596:55
212.96:006:54
312.96:016:52
412.86:026:50
512.86:036:49
612.76:046:47
712.76:056:45
812.66:066:44
912.66:076:42
1012.56:086:40
1112.56:096:38
1212.46:106:37
1312.46:116:35
1412.46:126:33
1512.36:136:31
1612.36:146:30
1712.26:156:28
1812.26:166:26
1912.16:176:24
2012.16:186:23
2112.06:196:21
2212.06:206:19
2311.96:216:17
2411.96:226:16
2511.86:236:14
2611.86:246:12
2711.86:256:10
2811.76:266:09
2911.76:276:07
3011.66:286:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.71 kWh/m².

For context, solar energy here swings from a low near 2.12 kWh/m² to a high of 8.11 kWh/m² in June across the year — September's 5.71 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.3Intense
46.3Intense
56.2Intense
66.2Intense
76.1Intense
86.1Intense
96.0Intense
106.0Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.2Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Holladay?

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

7.6
Sightseeing
1st-best month of the year
5.2
Beach & pool
4th-best month of the year

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

What to pack for Holladay in September

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

In September, Holladay sees daytime highs around 72°F and nights near 47°F. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Holladay in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Holladay peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 10Dec 21UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr5Moderate
May7Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Moderate

Air quality in Holladay 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 Holladay is worst in September — around 22 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodSep 1521 µg/m³Jun 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar12Moderate
Apr10Good
May10Good
Jun9Good
Jul11Good
Aug14Moderate
Sep22Moderate
Oct12Good
Nov9Good
Dec9Good
Location & terrain

Where is Holladay?

Holladay sits at 40.7°N, 111.8°W, 4,465 ft above sea level, in United States. The nearest listed city is East Millcreek, 2.5 mi away.

Topography around Holladay

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

Within 2 miles, the terrain around Holladay has large variations in elevation — a maximum elevation change of 2,785 ft around an average of 4,652 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 7,051 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,635 ft.

The land around Holladay is covered by trees (53%) and artificial surfaces (36%) within 2 miles, trees (44%) and artificial surfaces (35%) within 10 miles, and grassland (39%) and trees (30%) within 50 miles.

2 miles
2,785 ft
10 miles
7,051 ft
50 miles
7,635 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: East Millcreek 2.5 mi · Millcreek 3.1 mi · Murray 3.1 mi · Cottonwood Heights 3.7 mi · South Salt Lake 5.0 mi · Midvale 5.6 mi · Taylorsville 6.2 mi · Sandy 6.2 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 Holladay (40.6688°, -111.8247°, elevation 4,465 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).