Yuma weather in September

In September, Yuma sees average daytime highs of 101°F and overnight lows near 78°F, with 0.5 in of rain across 2.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 104°F in the first days to 98°F by the end. The sky is clear or mostly clear about 86% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Yuma's 2nd-clearest and 12th-windiest month. For the whole year in context, see Yuma's year-round climate.

Daytime high
101°
4th warmest
Overnight low
78°
10th coldest
Rainfall
0.5 in
2.1 wet days
Daylight
12 h 12 min
6:27 AM – 6:39 PM
Cloud cover
16%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
6.23 kWh/m²
Travel score
1.0
out of 10

Yuma is city in and county seat of Yuma County, Arizona, United States.

Density
306/km²
people per km²
Founded
1888

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 104°F in the first days to 98°F by the end.

A typical September day in Yuma reaches about 101°F in the afternoon and slips back to 78°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 94°F and 108°F. Set against its neighbours, September runs about 5°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
110582
210482
310482
410481
510481
610381
710380
810380
910380
1010380
1110279
1210279
1310279
1410278
1510178
1610178
1710177
1810177
1910176
2010076
2110076
2210076
2310075
249975
259974
269974
279874
289873
299873
309772

How September really feels in Yuma

Once humidity and wind are folded in, September averages 30 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
30
12 feel dangerously hot (≥ 102°F)
Days feeling ≤ 32°F
0
wind chill below the day's low

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

Yuma weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan71° / 49°0.41.810.18.3
Feb74° / 51°0.62.310.88.6
Mar81° / 56°0.41.411.88.1
Apr87° / 61°0.10.512.86.2
May95° / 68°0.00.213.73.4
Jun103° / 75°0.00.214.10.6
Jul107° / 83°0.21.613.90.0
Aug106° / 83°0.43.213.20.0
Sep101° / 78°0.52.112.21.0
Oct91° / 66°0.20.711.24.9
Nov78° / 55°0.3110.38.6
Dec69° / 48°0.41.79.98.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6937
7937
8946
9946
10946
11955
12955
13955
14946
15946
16955
17955
18955
19955
20946
21946
22946
23946
24946
25946
26937
27937
28937
29928
30928

Chance of precipitation in September

Any precipitation

Yuma gets around 0.5 in of rain over 2.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 7% and peaks near 13% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
113
213
313
413
512
612
711
811
910
1010
119
128
138
147
156
166
175
185
194
204
214
223
233
243
253
263
273
283
293
302

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
123162125141
224162025141
325162025141
427161924131
528161924131
630161823121
731161822120
833171721110
935171620110
1038171619100
1140171518100
124217151790
134418141690
144718141480
154918131370
165117131270
175417121160
185417121160
195816111050
205816111050
21611511940
22621510940
23631410940
24651310930
25661310830
26671210830
27681210730
28691110730
2971119630
3073109620

Wind in September

Winds average 6 mph in September, the calmest month.

Across September, 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.

0246810151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 6:17 AM to 6:36 AM, and sunset from 6:59 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:176:59
212.76:186:58
312.66:186:57
412.66:196:55
512.66:206:54
612.56:206:53
712.56:216:51
812.56:226:50
912.46:226:49
1012.46:236:47
1112.46:246:46
1212.36:246:44
1312.36:256:43
1412.36:266:42
1512.26:266:40
1612.26:276:39
1712.26:286:37
1812.16:286:36
1912.16:296:35
2012.16:306:33
2112.06:306:32
2212.06:316:30
2312.06:326:29
2411.96:326:28
2511.96:336:26
2611.96:346:25
2711.86:346:23
2811.86:356:22
2911.76:366:21
3011.76:366:19

Solar energy in September

Daily solar energy (kWh/m²)

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

For context, solar energy here swings from a low near 3.34 kWh/m² to a high of 8.47 kWh/m² in June across the year — September's 6.23 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.6Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.0Intense
246.0Intense
256.0Bright
265.9Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
Planning a trip in September

Is September a good time to visit Yuma?

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

1.0
Sightseeing
9th-best month of the year
4.4
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Yuma.

What to pack for Yuma in September

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

In September, Yuma sees daytime highs around 101°F and nights near 78°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Yuma in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Yuma peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJun 22UV 11Dec 18UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate
Location & terrain

Where is Yuma?

Yuma sits at 32.7°N, 114.6°W, 141 ft above sea level, in United States. The nearest listed city is Somerton, 9.9 mi away.

Topography around Yuma

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

Within 2 miles, the terrain around Yuma has only modest variations in elevation — a maximum elevation change of 131 ft around an average of 141 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,135 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,428 ft.

The land around Yuma is covered by artificial surfaces (37%) and cropland (29%) within 2 miles, bare terrain (44%) and cropland (36%) within 10 miles, and bare terrain (73%) within 50 miles.

2 miles
131 ft
10 miles
1,135 ft
50 miles
3,428 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Somerton 9.9 mi · Fortuna Foothills 13 mi · San Luis 19 mi · San Luis Río Colorado 21 mi · Ciudad Guadalupe Victoria 41 mi · Puebla 44 mi · Mexicali 48 mi · Calexico 51 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 Yuma (32.7253°, -114.6244°, elevation 141 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).