Turlock weather in September

In September, Turlock sees average daytime highs of 88°F and overnight lows near 62°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 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 Turlock's 3rd-clearest and 6th-windiest month. For the whole year in context, see Turlock's year-round climate.

Daytime high
88°
4th warmest
Overnight low
62°
9th coldest
Rainfall
0.1 in
0.5 wet days
Daylight
12 h 12 min
5:51 AM – 6:05 PM
Cloud cover
12%
3rd clearest
Wind
5 mph
6th windiest
Solar energy
6.12 kWh/m²
Travel score
5.9
out of 10

Turlock is city in Stanislaus County, California, United States.

Density
1,649/km²
people per km²
Founded
1908

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 Turlock reaches about 88°F in the afternoon and slips back to 62°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 96°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)
19265
29265
39264
49164
59164
69164
79164
89064
99063
109063
118963
128963
138962
148962
158862
168862
178862
188861
198761
208761
218761
228761
238760
248660
258660
268660
278560
288559
298559
308459

How September really feels in Turlock

Once humidity and wind are folded in, September averages 10 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
10
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.

Turlock 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
Jan58° / 42°3.58.29.74.7
Feb62° / 44°3.18.410.65.6
Mar68° / 48°2.77.911.76.8
Apr74° / 51°1.34.612.97.9
May83° / 57°0.82.8147.3
Jun91° / 63°0.10.814.54.9
Jul95° / 67°0.00.214.33.4
Aug94° / 66°0.00.113.44.0
Sep88° / 62°0.10.512.35.9
Oct79° / 55°0.82.4118.4
Nov66° / 46°1.55107.1
Dec58° / 41°3.07.69.54.7

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 5% of September, with mostly cloudy or overcast conditions the remaining 6%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1973
2973
3973
4964
5964
6964
7964
8964
9964
10955
11955
12955
13955
14955
15946
16946
17946
18937
19928
20928
21928
22928
23928
24928
25919
269010
279010
289010
299010
309010

Chance of precipitation in September

Any precipitation

Turlock 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 4% 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
152
162
172
182
192
202
212
222
232
242
253
263
273
283
293
304

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1771931
2781831
3781831
4791731
5791731
6801631
7811621
8811621
9821521
10821521
11821521
12821521
13831520
14831520
15841510
16831610
17831610
18831610
19831610
20831610
21841510
22841510
23841510
24841510
25851500
26851500
27861400
28861400
29861400
30871300

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 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 5:38 AM to 6:03 AM, and sunset from 6:28 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:386:28
212.85:396:27
312.85:396:25
412.75:406:24
512.75:416:22
612.65:426:21
712.65:436:19
812.65:446:18
912.55:456:16
1012.55:456:14
1112.45:466:13
1212.45:476:11
1312.45:486:10
1412.35:496:08
1512.35:506:06
1612.25:516:05
1712.25:516:03
1812.25:526:02
1912.15:536:00
2012.15:545:58
2112.05:555:57
2212.05:565:55
2311.95:575:54
2411.95:585:52
2511.95:585:50
2611.85:595:49
2711.86:005:47
2811.76:015:46
2911.76:025:44
3011.76:035:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.12 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 8.25 kWh/m² in June across the year — September's 6.12 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
86.5Intense
96.5Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.1Intense
176.0Intense
186.0Intense
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.6Bright
265.6Bright
275.5Bright
285.5Bright
295.4Bright
305.3Bright
Planning a trip in September

Is September a good time to visit Turlock?

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

5.9
Sightseeing
6th-best month of the year
8.8
Beach & pool
1st-best month of the year

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

What to pack for Turlock in September

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

In September, Turlock sees daytime highs around 88°F and nights near 62°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Turlock 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 Turlock peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 14UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Moderate

Air quality in Turlock 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 Turlock is worst in August — around 29 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1928 µg/m³Jun 118 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar14Moderate
Apr11Good
May9Good
Jun8Good
Jul15Moderate
Aug29Moderate
Sep22Moderate
Oct17Moderate
Nov15Moderate
Dec12Moderate
Location & terrain

Where is Turlock?

Turlock sits at 37.5°N, 120.8°W, 102 ft above sea level, in United States. The nearest listed city is Ceres, 9.3 mi away.

Topography around Turlock

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

Within 2 miles, the terrain around Turlock has only modest variations in elevation — a maximum elevation change of 66 ft around an average of 105 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 226 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,820 ft.

The land around Turlock is covered by artificial surfaces (61%) within 2 miles, cropland (38%) and trees (34%) within 10 miles, and grassland (47%) and trees (29%) within 50 miles.

2 miles
66 ft
10 miles
226 ft
50 miles
4,820 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ceres 9.3 mi · Modesto 13 mi · Patterson 16 mi · Atwater 17 mi · Riverbank 17 mi · Oakdale 19 mi · Ripon 23 mi · Merced 24 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 Turlock (37.4947°, -120.8466°, elevation 102 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).