Delano weather in September

In September, Delano sees average daytime highs of 89°F and overnight lows near 66°F, with 0.0 in of rain across 0.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 93°F in the first days to 86°F by the end. The sky is clear or mostly clear about 88% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Delano's 2nd-clearest and 6th-windiest month. For the whole year in context, see Delano's year-round climate.

Daytime high
89°
4th warmest
Overnight low
66°
10th coldest
Rainfall
0.0 in
0.4 wet days
Daylight
12 h 12 min
5:45 AM – 5:58 PM
Cloud cover
12%
2nd clearest
Wind
3 mph
6th windiest
Solar energy
6.21 kWh/m²
Travel score
5.5
out of 10

Delano is city in California, United States.

Density
1,418/km²
people per km²
Founded
1869

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 93°F in the first days to 86°F by the end.

A typical September day in Delano reaches about 89°F in the afternoon and slips back to 66°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 97°F. Set against its neighbours, September runs about 6°F cooler than August and about 11°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19470
29369
39369
49369
59369
69269
79268
89268
99168
109167
119167
129067
139067
149067
158966
168966
178966
188965
198865
208865
218865
228865
238764
248764
258764
268664
278663
288663
298563
308562

How September really feels in Delano

Once humidity and wind are folded in, September averages 14 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
14
heat index over the day's high
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.

Delano 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 daysDaylight (hours)Travel score
Jan59° / 43°2.16.99.95.1
Feb63° / 46°2.17.910.65.8
Mar68° / 49°2.16.811.76.9
Apr74° / 53°1.0412.98.1
May82° / 60°0.42.313.97.7
Jun91° / 66°0.10.514.45.1
Jul96° / 72°0.00.214.22.9
Aug96° / 71°0.00.213.43.2
Sep89° / 66°0.00.412.25.5
Oct79° / 57°0.52.111.18.5
Nov66° / 48°1.0410.17.3
Dec59° / 42°1.86.29.65.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 88% of the time in September.

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

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2964
3964
4964
5964
6964
7955
8955
9955
10955
11955
12955
13955
14946
15946
16946
17946
18937
19937
20937
21937
22937
23937
24937
25928
26928
27928
28928
29928
30928

Chance of precipitation in September

Any precipitation

Delano gets around 0.0 in of rain over 0.4 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 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
222
232
242
252
262
273
283
293
303

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1722152
2722152
3732142
4732142
5732142
6732142
7742132
8752032
9752032
10752032
11772021
12772021
13772021
14772021
15782020
16782020
17782020
18791920
19791920
20791920
21801820
22801820
23801820
24801820
25801820
26801820
27801820
28811720
29811720
30821620

Wind in September

Winds average 3 mph in September.

Across September, daily wind ranges from about 3 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 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 66 minutes over September. Sunrise moves from 5:33 AM to 5:56 AM, and sunset from 6:21 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:336:21
212.85:346:19
312.75:346:18
412.75:356:16
512.65:366:15
612.65:376:13
712.65:386:12
812.55:386:10
912.55:396:09
1012.55:406:07
1112.45:416:06
1212.45:416:04
1312.35:426:03
1412.35:436:01
1512.35:446:00
1612.25:455:58
1712.25:455:56
1812.15:465:55
1912.15:475:53
2012.15:485:52
2112.05:495:50
2212.05:495:49
2312.05:505:47
2411.95:515:46
2511.95:525:44
2611.85:535:43
2711.85:535:41
2811.85:545:40
2911.75:555:38
3011.75:565:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.21 kWh/m².

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 8.25 kWh/m² in June across the year — September's 6.21 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.7Intense
56.7Intense
66.6Intense
76.6Intense
86.6Intense
96.5Intense
106.5Intense
116.4Intense
126.4Intense
136.3Intense
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
275.7Bright
285.6Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Delano?

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

5.5
Sightseeing
7th-best month of the year
8.6
Beach & pool
1st-best month of the year

September is a reasonable time to visit Delano for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Delano in September

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

In September, Delano sees daytime highs around 89°F and nights near 66°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Delano 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 Delano peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 highVery highHighModerateJun 20UV 10Dec 16UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Very high
Aug10Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Delano 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 Delano is worst in September — around 69 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (May, 10 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateUnhealthyModerateSep 1665 µg/m³May 2410 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar15Moderate
Apr12Good
May10Good
Jun10Good
Jul17Moderate
Aug33Moderate
Sep69Unhealthy
Oct36Poor
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Delano?

Delano sits at 35.8°N, 119.2°W, 315 ft above sea level, in United States. The nearest listed city is Wasco, 13 mi away.

Topography around Delano

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

Within 2 miles, the terrain around Delano has only modest variations in elevation — a maximum elevation change of 105 ft around an average of 312 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 525 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,957 ft.

The land around Delano is covered by artificial surfaces (42%) and grassland (23%) within 2 miles, cropland (40%), trees (27%) and grassland (20%) within 10 miles, and grassland (45%), trees (22%) and cropland (21%) within 50 miles.

2 miles
105 ft
10 miles
525 ft
50 miles
9,957 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Wasco 13 mi · Shafter 19 mi · Porterville 24 mi · Oildale 27 mi · Corcoran 29 mi · Bakersfield 30 mi · Tulare 31 mi · Visalia 39 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 Delano (35.7688°, -119.2471°, elevation 315 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).