Clovis weather in September

In September, Clovis sees average daytime highs of 89°F and overnight lows near 64°F, with 0.1 in of rain across 0.5 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 Clovis's 3rd-clearest and 7th-windiest month. For the whole year in context, see Clovis's year-round climate.

Daytime high
89°
4th warmest
Overnight low
64°
9th coldest
Rainfall
0.1 in
0.5 wet days
Daylight
12 h 12 min
5:46 AM – 6:00 PM
Cloud cover
12%
3rd clearest
Wind
4 mph
7th windiest
Solar energy
6.18 kWh/m²
Travel score
5.5
out of 10

Clovis is city in Fresno County, California, United States.

Density
1,662/km²
people per km²
Founded
1890

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 Clovis reaches about 89°F in the afternoon and slips back to 64°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 11°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19467
29367
39367
49367
59266
69266
79266
89265
99165
109165
119165
129064
139064
149064
158964
168964
178963
188963
198863
208863
218862
228862
238762
248762
258761
268661
278661
288661
298560
308560

How September really feels in Clovis

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.

Clovis 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° / 41°3.57.59.84.8
Feb62° / 44°2.9810.65.7
Mar68° / 47°2.97.311.76.8
Apr74° / 51°1.44.412.97.9
May82° / 58°0.72.713.97.5
Jun91° / 64°0.20.614.54.9
Jul96° / 70°0.10.214.32.9
Aug95° / 69°0.00.213.43.3
Sep89° / 64°0.10.512.25.5
Oct79° / 55°0.82.1118.4
Nov66° / 46°1.44.3107.2
Dec58° / 41°2.86.99.54.8

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%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1973
2964
3964
4964
5964
6964
7964
8964
9955
10955
11946
12946
13946
14946
15946
16946
17937
18937
19937
20937
21937
22937
23928
24919
25919
26919
27919
28919
299010
309010

Chance of precipitation in September

Any precipitation

Clovis 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
151
161
171
181
191
202
212
222
232
242
253
263
273
283
294
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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1771751
2771751
3781651
4781651
5781651
6791551
7801541
8801541
9801541
10801541
11811531
12811531
13821530
14831520
15831520
16821620
17821620
18831610
19831610
20831610
21831610
22831610
23831610
24831610
25831610
26831610
27831610
28831610
29841510
30841510

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
145calm
155calm
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 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 5:34 AM to 5:58 AM, and sunset from 6:23 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:346:23
212.85:356:22
312.75:356:20
412.75:366:19
512.75:376:17
612.65:386:16
712.65:396:14
812.65:406:13
912.55:406:11
1012.55:416:10
1112.45:426:08
1212.45:436:06
1312.45:446:05
1412.35:456:03
1512.35:456:02
1612.25:466:00
1712.25:475:58
1812.25:485:57
1912.15:495:55
2012.15:505:54
2112.05:505:52
2212.05:515:51
2311.95:525:49
2411.95:535:47
2511.95:545:46
2611.85:555:44
2711.85:555:43
2811.75:565:41
2911.75:575:40
3011.75:585:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.18 kWh/m².

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 8.26 kWh/m² in June across the year — September's 6.18 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.9Intense
26.8Intense
36.8Intense
46.7Intense
56.7Intense
66.6Intense
76.6Intense
86.5Intense
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 Clovis?

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 Clovis for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Clovis in September

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

In September, Clovis sees daytime highs around 89°F and nights near 64°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Clovis 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 Clovis 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 highExtremeVery highHighModerateJun 20UV 10Dec 17UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Very high
Aug10Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Moderate

Air quality in Clovis 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 Clovis 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 Clovis?

Clovis sits at 36.8°N, 119.7°W, 361 ft above sea level, in United States. The nearest listed city is Fresno, 6.8 mi away.

Topography around Clovis

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

Within 2 miles, the terrain around Clovis has only modest variations in elevation — a maximum elevation change of 66 ft around an average of 364 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,394 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,479 ft.

The land around Clovis is covered by artificial surfaces (78%) within 2 miles, artificial surfaces (36%) and grassland (34%) within 10 miles, and trees (38%), grassland (32%) and cropland (23%) within 50 miles.

2 miles
66 ft
10 miles
1,394 ft
50 miles
10,479 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Fresno 6.8 mi · Sanger 11 mi · Parlier 17 mi · Selma 18 mi · Reedley 21 mi · Madera 22 mi · Dinuba 26 mi · Hanford 35 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 Clovis (36.8252°, -119.7029°, elevation 361 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).