Mead Valley weather in September

In September, Mead Valley sees average daytime highs of 87°F and overnight lows near 64°F, with 0.2 in of rain across 1.1 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 85°F by the end. The sky is clear or mostly clear about 87% 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 Mead Valley's 2nd-clearest and 12th-windiest month. For the whole year in context, see Mead Valley's year-round climate.

Daytime high
87°
3rd warmest
Overnight low
64°
10th coldest
Rainfall
0.2 in
1.1 wet days
Daylight
12 h 12 min
5:37 AM – 5:50 PM
Cloud cover
15%
2nd clearest
Wind
3 mph
12th windiest
Solar energy
6.23 kWh/m²
Travel score
6.1
out of 10

Mead Valley is CDP in Riverside County, California, United States.

Density
373/km²
people per km²

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 90°F in the first days to 85°F by the end.

A typical September day in Mead Valley reaches about 87°F in the afternoon and slips back to 64°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 97°F. Set against its neighbours, September runs about 3°F cooler than August and about 8°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19167
29167
39067
49067
59066
68966
78966
88965
98965
108965
118865
128864
138864
148764
158764
168763
178763
188763
198763
208762
218662
228662
238662
248662
258661
268561
278561
288561
298560
308460

How September really feels in Mead Valley

Once humidity and wind are folded in, September averages 5 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
5
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.

Mead Valley weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 42°3.26.4106.5
Feb64° / 44°4.17.110.76.4
Mar67° / 47°2.56.311.77.0
Apr71° / 50°1.24.412.87.9
May76° / 55°0.62.513.78.7
Jun83° / 60°0.10.714.27.8
Jul89° / 66°0.10.9145.5
Aug91° / 67°0.10.613.35.0
Sep87° / 64°0.21.112.26.1
Oct80° / 56°0.82.811.18.3
Nov70° / 47°1.23.310.28.0
Dec63° / 42°2.45.29.86.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 87% 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 8%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6937
7937
8937
9937
10946
11946
12937
13937
14937
15937
16937
17928
18928
19928
20919
21919
22919
23919
249010
259010
268911
278911
288911
298911
308911

Chance of precipitation in September

Any precipitation

Mead Valley gets around 0.2 in of rain over 1.1 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 4% and peaks near 5% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
54
64
74
84
94
103
113
123
133
143
153
163
174
184
194
204
214
224
234
244
254
264
275
285
295
305

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 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12937285
23037286
33137276
43236266
53336256
63436245
73536235
83637225
93737215
103838204
113938194
124039173
134239163
144340152
154440142
164640132
174739121
184839121
194939111
205038111
215138101
225237101
23543691
24553591
25563491
26573391
27593281
28603181
29632971
30642871

Wind in September

Winds average 3 mph in September, the calmest month.

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
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:27 AM to 5:47 AM, and sunset from 6:11 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:276:11
212.75:276:10
312.75:286:08
412.65:296:07
512.65:306:05
612.65:306:04
712.55:316:03
812.55:326:01
912.55:326:00
1012.45:335:58
1112.45:345:57
1212.45:345:56
1312.35:355:54
1412.35:365:53
1512.25:375:51
1612.25:375:50
1712.25:385:48
1812.15:395:47
1912.15:395:45
2012.15:405:44
2112.05:415:42
2212.05:425:41
2312.05:425:40
2411.95:435:38
2511.95:445:37
2611.85:445:35
2711.85:455:34
2811.85:465:32
2911.75:475:31
3011.75:475:30

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 3.03 kWh/m² to a high of 8.18 kWh/m² in June across the year — September's 6.23 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.7Intense
36.7Intense
46.7Intense
56.6Intense
66.6Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.4Intense
126.4Intense
136.4Intense
146.3Intense
156.3Intense
166.3Intense
176.2Intense
186.2Intense
196.1Intense
206.1Intense
216.0Intense
226.0Intense
236.0Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.6Bright
Planning a trip in September

Is September a good time to visit Mead Valley?

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

6.1
Sightseeing
10th-best month of the year
8.8
Beach & pool
2nd-best month of the year

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

What to pack for Mead Valley in September

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

In September, Mead Valley sees daytime highs around 87°F and nights near 64°F. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Mead Valley in September

The nearest coast averages about 69°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 mi away) is warmest in August at about 69°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar59Cool
Apr60Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug69Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec60Cool

UV index in Mead Valley in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mead Valley peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Mead Valley 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 Mead Valley is worst in September — around 40 µg/m³ PM2.5 (poor), about 5.4× the cleanest month (December, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1437 µg/m³Dec 207 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar11Good
Apr10Good
May8Good
Jun19Moderate
Jul12Moderate
Aug20Moderate
Sep40Poor
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Mead Valley?

Mead Valley sits at 33.8°N, 117.3°W, 1,657 ft above sea level, in United States. The nearest listed city is Perris, 5.0 mi away.

Topography around Mead Valley

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

Within 2 miles, the terrain around Mead Valley has only modest variations in elevation — a maximum elevation change of 702 ft around an average of 1,729 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,251 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,424 ft.

The land around Mead Valley is covered by grassland (42%) and artificial surfaces (22%) within 2 miles, grassland (38%) and artificial surfaces (27%) within 10 miles, and shrubs (28%) and artificial surfaces (20%) within 50 miles.

2 miles
702 ft
10 miles
2,251 ft
50 miles
11,424 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Perris 5.0 mi · Moreno Valley 8.1 mi · Riverside 9.9 mi · Sun City 11 mi · Menifee 11 mi · Lake Elsinore 12 mi · Rubidoux 13 mi · Loma Linda 15 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 Mead Valley (33.8334°, -117.2961°, elevation 1,657 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).