Escondido weather in September

In September, Escondido sees average daytime highs of 82°F and overnight lows near 63°F, with 0.2 in of rain across 1 wet days and about 12.2 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 80°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 Escondido's 2nd-clearest and 12th-windiest month. For the whole year in context, see Escondido's year-round climate.

Daytime high
82°
2nd warmest
Overnight low
63°
10th coldest
Rainfall
0.2 in
1 wet days
Daylight
12 h 12 min
5:37 AM – 5:49 PM
Cloud cover
16%
2nd clearest
Wind
4 mph
12th windiest
Solar energy
6.27 kWh/m²
Travel score
8.3
out of 10

Escondido is city in San Diego County, United States.

Density
1,566/km²
people per km²
Founded
1888

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 84°F in the first days to 80°F by the end.

A typical September day in Escondido reaches about 82°F in the afternoon and slips back to 63°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 90°F. Set against its neighbours, September runs on par with August and about 5°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18465
28465
38465
48365
58365
68365
78365
88364
98364
108264
118264
128264
138263
148263
158263
168263
178263
188162
198162
208162
218162
228162
238162
248162
258161
268161
278161
288061
298061
308060

Escondido weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 44°2.96.210.16.7
Feb64° / 46°3.87.410.86.3
Mar66° / 48°2.56.411.76.8
Apr69° / 51°1.24.412.87.6
May72° / 55°0.62.613.78.3
Jun77° / 59°0.10.614.19.2
Jul81° / 64°0.11148.6
Aug83° / 65°0.10.513.27.9
Sep82° / 63°0.2112.28.3
Oct77° / 57°0.82.811.28.6
Nov70° / 50°1.33.710.37.9
Dec64° / 44°2.35.49.96.7

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 (%)
1955
2955
3955
4946
5946
6946
7946
8946
9946
10946
11946
12946
13937
14937
15928
16928
17928
18919
19919
209010
219010
228911
238911
248911
258812
268812
278713
288713
298713
308713

Chance of precipitation in September

Any precipitation

Escondido 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 (%)
12
22
32
42
52
62
72
82
92
102
112
123
133
143
153
163
174
184
194
204
214
224
234
245
255
265
275
285
295
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 46% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16374315
26384115
36394015
47403815
58413715
68423514
79433414
810443313
911453212
1012463111
1113463110
121447309
131548298
141648297
151749286
161949276
172049265
182149264
192249264
202348254
212448253
222548243
232648233
242847223
252947212
263047202
273247192
283446182
293646162
303845152

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 5:26 AM to 5:46 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)
112.75:266:10
212.75:276:08
312.75:286:07
412.65:296:06
512.65:296:04
612.55:306:03
712.55:316:01
812.55:316:00
912.45:325:59
1012.45:335:57
1112.45:335:56
1212.35:345:54
1312.35:355:53
1412.35:355:52
1512.25:365:50
1612.25:375:49
1712.25:375:47
1812.15:385:46
1912.15:395:44
2012.15:395:43
2112.05:405:42
2212.05:415:40
2312.05:415:39
2411.95:425:37
2511.95:435:36
2611.95:435:35
2711.85:445:33
2811.85:455:32
2911.75:465:30
3011.75:465:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.27 kWh/m².

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 8.17 kWh/m² in June across the year — September's 6.27 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.7Intense
46.7Intense
56.7Intense
66.6Intense
76.6Intense
86.6Intense
96.5Intense
106.5Intense
116.5Intense
126.4Intense
136.4Intense
146.4Intense
156.3Intense
166.3Intense
176.3Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.0Intense
236.0Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Escondido?

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

8.3
Sightseeing
4th-best month of the year
8.9
Beach & pool
2nd-best month of the year

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

What to pack for Escondido in September

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

In September, Escondido sees daytime highs around 82°F and nights near 63°F. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Escondido 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 17 mi away) is warmest in August at about 71°F and coldest in January near 59°F.

It's comfortable for a long swim from Jul 5 to Oct 7 — 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
May64Cool
Jun66Cool
Jul69Refreshing
Aug71Refreshing
Sep70Refreshing
Oct67Cool
Nov64Cool
Dec61Cool

UV index in Escondido 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 Escondido peaks around July 11 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJul 11UV 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 Escondido 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 Escondido is worst in September — around 26 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (May, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1625 µg/m³May 168 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar12Moderate
Apr11Good
May8Good
Jun11Good
Jul11Good
Aug15Moderate
Sep26Moderate
Oct14Moderate
Nov12Moderate
Dec16Moderate
Location & terrain

Where is Escondido?

Escondido sits at 33.1°N, 117.1°W, 646 ft above sea level, in United States. The nearest listed city is San Marcos, 5.0 mi away.

Topography around Escondido

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

Within 2 miles, the terrain around Escondido has only modest variations in elevation — a maximum elevation change of 354 ft around an average of 696 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,799 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,724 ft.

The land around Escondido is covered by artificial surfaces (80%) within 2 miles, trees (34%), shrubs (24%) and artificial surfaces (23%) within 10 miles, and shrubs (29%) and water (22%) within 50 miles.

2 miles
354 ft
10 miles
2,799 ft
50 miles
8,724 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San Marcos 5.0 mi · Vista 11 mi · Rancho Penasquitos 11 mi · Poway 11 mi · Encinitas 13 mi · Ramona 14 mi · Mira Mesa 14 mi · Carlsbad 16 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 Escondido (33.1192°, -117.0864°, elevation 646 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).