Chowchilla weather in September

In September, Chowchilla sees average daytime highs of 89°F and overnight lows near 63°F, with 0.1 in of rain across 0.5 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 92°F in the first days to 85°F by the end. The sky is clear or mostly clear about 89% 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 Chowchilla's 3rd-clearest and 6th-windiest month. For the whole year in context, see Chowchilla's year-round climate.

Daytime high
89°
4th warmest
Overnight low
63°
9th coldest
Rainfall
0.1 in
0.5 wet days
Daylight
12 h 12 min
5:48 AM – 6:02 PM
Cloud cover
12%
3rd clearest
Wind
5 mph
6th windiest
Solar energy
6.19 kWh/m²
Travel score
5.7
out of 10

Chowchilla is city in Madera County, California, United States.

Density
642/km²
people per km²
Founded
1923

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 92°F in the first days to 85°F by the end.

A typical September day in Chowchilla reaches about 89°F in the afternoon and slips back to 63°F overnight — a 26°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 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19366
29366
39266
49265
59265
69265
79165
89165
99164
109164
119064
129064
139063
148963
158963
168963
178962
188862
198862
208862
218862
228761
238761
248761
258761
268660
278660
288560
298560
308559

How September really feels in Chowchilla

Once humidity and wind are folded in, September averages 13 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
13
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.

Chowchilla 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° / 41°3.37.79.74.8
Feb63° / 44°2.87.910.65.8
Mar68° / 48°2.67.111.77.0
Apr75° / 52°1.14.312.98.0
May83° / 58°0.62.5147.2
Jun91° / 64°0.10.514.54.8
Jul96° / 68°0.00.114.33.0
Aug95° / 68°0.00.113.43.5
Sep89° / 63°0.10.512.35.7
Oct79° / 55°0.72.1118.4
Nov67° / 46°1.34.4107.2
Dec58° / 40°2.76.99.54.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 4% of September, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2964
3964
4955
5955
6955
7955
8955
9955
10955
11955
12955
13946
14946
15946
16946
17937
18937
19937
20928
21928
22928
23928
24919
25919
26919
27919
289010
299010
309010

Chance of precipitation in September

Any precipitation

Chowchilla gets around 0.1 in of rain over 0.5 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 2% 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
182
192
202
212
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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1751951
2751951
3761851
4761851
5771841
6771841
7781741
8781741
9781741
10781741
11791731
12781831
13791830
14801820
15801820
16791920
17791920
18791920
19801820
20801820
21801820
22811810
23811810
24811810
25811810
26821710
27821710
28821710
29831610
30841510

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 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
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 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 5:36 AM to 6:00 AM, and sunset from 6:26 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:366:26
212.85:376:24
312.85:376:23
412.75:386:21
512.75:396:20
612.65:406:18
712.65:416:17
812.65:426:15
912.55:426:13
1012.55:436:12
1112.45:446:10
1212.45:456:09
1312.45:466:07
1412.35:476:06
1512.35:486:04
1612.25:486:02
1712.25:496:01
1812.25:505:59
1912.15:515:58
2012.15:525:56
2112.05:535:54
2212.05:535:53
2311.95:545:51
2411.95:555:50
2511.95:565:48
2611.85:575:47
2711.85:585:45
2811.75:595:43
2911.76:005:42
3011.76:005:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.19 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 8.32 kWh/m² in June across the year — September's 6.19 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.9Intense
26.8Intense
36.8Intense
46.8Intense
56.7Intense
66.7Intense
76.6Intense
86.6Intense
96.5Intense
106.5Intense
116.4Intense
126.4Intense
136.3Intense
146.3Intense
156.2Intense
166.2Intense
176.1Intense
186.1Intense
196.0Intense
206.0Bright
215.9Bright
225.9Bright
235.8Bright
245.8Bright
255.7Bright
265.7Bright
275.6Bright
285.5Bright
295.5Bright
305.4Bright
Planning a trip in September

Is September a good time to visit Chowchilla?

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

5.7
Sightseeing
7th-best month of the year
8.7
Beach & pool
1st-best month of the year

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

What to pack for Chowchilla in September

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

In September, Chowchilla sees daytime highs around 89°F and nights near 63°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Chowchilla 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 Chowchilla peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 17UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Moderate

Air quality in Chowchilla 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 Chowchilla is worst in September — around 28 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (June, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1828 µg/m³Jun 108 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar17Moderate
Apr12Good
May9Good
Jun7Good
Jul23Moderate
Aug22Moderate
Sep28Moderate
Oct24Moderate
Nov16Moderate
Dec13Moderate
Location & terrain

Where is Chowchilla?

Chowchilla sits at 37.1°N, 120.3°W, 240 ft above sea level, in United States. The nearest listed city is Madera, 16 mi away.

Topography around Chowchilla

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

Within 2 miles, the terrain around Chowchilla has only modest variations in elevation — a maximum elevation change of 62 ft around an average of 236 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 233 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,072 ft.

The land around Chowchilla is covered by cropland (29%), trees (25%) and grassland (22%) within 2 miles, trees (39%), cropland (30%) and grassland (26%) within 10 miles, and grassland (42%), trees (30%) and cropland (20%) within 50 miles.

2 miles
62 ft
10 miles
233 ft
50 miles
9,072 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Madera 16 mi · Merced 17 mi · Atwater 25 mi · Los Banos 33 mi · Clovis 37 mi · Fresno 37 mi · Turlock 41 mi · Sanger 48 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 Chowchilla (37.123°, -120.2602°, elevation 240 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).