Murrieta weather in September

In September, Murrieta sees average daytime highs of 84°F and overnight lows near 64°F, with 0.2 in of rain across 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 86°F in the first days to 82°F by the end. The sky is clear or mostly clear about 86% of the time in September, and the air most often feels comfortable.

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 Murrieta's 2nd-clearest and 12th-windiest month. For the whole year in context, see Murrieta's year-round climate.

Daytime high
84°
3rd warmest
Overnight low
64°
10th coldest
Rainfall
0.2 in
1 wet days
Daylight
12 h 12 min
5:37 AM – 5:49 PM
Cloud cover
17%
2nd clearest
Wind
4 mph
12th windiest
Solar energy
6.18 kWh/m²
Travel score
7.5
out of 10

Murrieta is city in Riverside County, California, United States.

Density
1,261/km²
people per km²
Founded
1991

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 86°F in the first days to 82°F by the end.

A typical September day in Murrieta reaches about 84°F in the afternoon and slips back to 64°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 93°F. Set against its neighbours, September runs about 3°F cooler than August and about 6°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18667
28667
38667
48667
58666
68566
78566
88566
98566
108565
118465
128465
138465
148464
158464
168364
178364
188364
198364
208363
218363
228363
238363
248363
258263
268262
278262
288262
298262
308162

Murrieta 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° / 45°2.75.8106.5
Feb64° / 46°3.4710.86.2
Mar66° / 49°2.0611.76.9
Apr69° / 52°1.03.512.87.8
May73° / 56°0.42.113.78.5
Jun79° / 60°0.10.614.28.9
Jul85° / 65°0.20.8147.2
Aug86° / 67°0.10.613.26.6
Sep84° / 64°0.2112.27.5
Oct77° / 58°0.72.711.28.6
Nov70° / 50°1.03.110.38.0
Dec63° / 45°2.04.99.86.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% 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 8%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1946
2946
3946
4946
5946
6946
7946
8946
9946
10946
11946
12946
13937
14937
15937
16937
17928
18928
19928
20919
21919
22919
23919
24919
259010
269010
278911
288911
298911
308911

Chance of precipitation in September

Any precipitation

Murrieta gets around 0.2 in of rain over 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 3% and peaks near 5% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
53
63
73
83
93
103
113
123
133
143
153
163
173
183
194
204
214
224
234
244
254
264
274
284
294
305

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
111373714
212373614
313383514
414383414
514393314
615393214
717393113
818403012
919403011
1020412910
112142289
122243278
132343267
142444256
152545246
162745245
172845234
182944224
193044224
203243223
213343213
223442213
233542203
243741193
253841192
263940182
274140172
284339162
294539152
304738142

Wind in September

Winds average 4 mph in September, the calmest month.

Across September, daily wind ranges from about 4 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
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 6:10 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:276:10
212.75:276:09
312.75:286:08
412.65:296:06
512.65:296:05
612.65:306:04
712.55:316:02
812.55:316:01
912.55:325:59
1012.45:335:58
1112.45:345:57
1212.35:345:55
1312.35:355:54
1412.35:365:52
1512.25:365:51
1612.25:375:49
1712.25:385:48
1812.15:385:46
1912.15:395:45
2012.15:405:44
2112.05:415:42
2212.05:415:41
2312.05:425:39
2411.95:435:38
2511.95:435:36
2611.85:445:35
2711.85:455:34
2811.85:465:32
2911.75:465:31
3011.75:475:29

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 3.06 kWh/m² to a high of 8.04 kWh/m² in June across the year — September's 6.18 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.6Intense
46.6Intense
56.6Intense
66.5Intense
76.5Intense
86.5Intense
96.4Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.3Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.0Intense
216.0Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
Planning a trip in September

Is September a good time to visit Murrieta?

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

7.5
Sightseeing
6th-best month of the year
9.1
Beach & pool
3rd-best month of the year

September is one of the better times to visit Murrieta for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Murrieta in September

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

In September, Murrieta sees daytime highs around 84°F and nights near 64°F. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Murrieta in September

The nearest coast averages about 70°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 27 mi away) is warmest in August at about 70°F and coldest in January near 59°F.

It's comfortable for a long swim from Jul 6 to Oct 6 — about 3.1 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar60Cool
Apr61Cool
May63Cool
Jun66Cool
Jul69Refreshing
Aug70Refreshing
Sep70Refreshing
Oct67Cool
Nov64Cool
Dec61Cool

UV index in Murrieta 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 Murrieta peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highHighModerateJul 12UV 11Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Murrieta 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 Murrieta 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 Murrieta?

Murrieta sits at 33.6°N, 117.2°W, 1,096 ft above sea level, in United States. The nearest listed city is Wildomar, 5.0 mi away.

Topography around Murrieta

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

Within 2 miles, the terrain around Murrieta has significant variations in elevation — a maximum elevation change of 951 ft around an average of 1,211 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,212 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,381 ft.

The land around Murrieta is covered by artificial surfaces (41%), trees (25%) and grassland (21%) within 2 miles, trees (27%), grassland (25%) and artificial surfaces (21%) within 10 miles, and shrubs (27%) within 50 miles.

2 miles
951 ft
10 miles
3,212 ft
50 miles
11,381 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Wildomar 5.0 mi · Temecula 5.6 mi · Lake Elsinore 9.9 mi · Sun City 11 mi · Fallbrook 12 mi · Menifee 12 mi · Perris 16 mi · Hemet 19 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 Murrieta (33.5539°, -117.2139°, elevation 1,096 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).