Laguna weather in September

In September, Laguna sees average daytime highs of 87°F and overnight lows near 59°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 90°F in the first days to 84°F by the end. The sky is clear or mostly clear about 86% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Laguna's 3rd-clearest and 9th-windiest month. For the whole year in context, see Laguna's year-round climate.

Daytime high
87°
4th warmest
Overnight low
59°
9th coldest
Rainfall
0.1 in
0.5 wet days
Daylight
12 h 12 min
5:53 AM – 6:07 PM
Cloud cover
14%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
5.98 kWh/m²
Travel score
6.3
out of 10

Laguna is former census-designated place in California, USA.

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 84°F by the end.

A typical September day in Laguna reaches about 87°F in the afternoon and slips back to 59°F overnight — a 28°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 96°F. Set against its neighbours, September runs about 3°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19061
29060
39060
48960
58960
68960
78960
88960
98960
108860
118859
128859
138859
148759
158759
168759
178759
188758
198758
208658
218658
228658
238658
248658
258558
268558
278557
288557
298457
308457

How September really feels in Laguna

Once humidity and wind are folded in, September averages 3 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
3
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.

Laguna 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°4.79.89.64.3
Feb62° / 44°4.39.310.55.3
Mar67° / 47°3.69.111.76.4
Apr73° / 51°1.65.4137.6
May81° / 55°0.93.714.17.7
Jun88° / 60°0.2114.65.9
Jul91° / 61°0.00.114.45.0
Aug91° / 61°0.10.113.55.2
Sep87° / 59°0.10.512.36.3
Oct78° / 53°1.23.1118.3
Nov65° / 46°2.36.59.96.6
Dec57° / 41°4.49.69.44.2

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 7% of September, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2964
3964
4964
5955
6955
7955
8955
9955
10955
11946
12937
13937
14937
15937
16928
17928
18928
19928
20928
21919
22919
23919
24919
25919
26919
279010
289010
299010
309010

Chance of precipitation in September

Any precipitation

Laguna 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 5% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
112
122
132
142
152
162
172
182
192
203
213
223
233
243
253
264
274
284
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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
170273
271263
372253
473243
573243
674233
775223
876213
976213
1078202
1178202
1278202
1378202
1479192
1580191
1680191
1780191
1880191
1980191
2081181
2181181
2282171
2383170
2484160
2584160
2685150
2786140
2886140
2986140
3087130

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 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:39 AM to 6:06 AM, and sunset from 6:32 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:396:32
212.85:406:30
312.85:416:28
412.85:426:27
512.75:436:25
612.75:446:24
712.65:456:22
812.65:456:20
912.55:466:19
1012.55:476:17
1112.55:486:16
1212.45:496:14
1312.45:506:12
1412.35:516:11
1512.35:526:09
1612.25:536:07
1712.25:546:06
1812.25:546:04
1912.15:556:02
2012.15:566:01
2112.05:575:59
2212.05:585:57
2311.95:595:56
2411.96:005:54
2511.96:015:53
2611.86:025:51
2711.86:035:49
2811.76:045:48
2911.76:055:46
3011.66:065:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.98 kWh/m².

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 8.18 kWh/m² in July across the year — September's 5.98 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.6Intense
46.6Intense
56.5Intense
66.5Intense
76.4Intense
86.4Intense
96.3Intense
106.3Intense
116.2Intense
126.2Intense
136.1Intense
146.1Intense
156.0Intense
166.0Bright
175.9Bright
185.8Bright
195.8Bright
205.7Bright
215.7Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.4Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Laguna

In seasonPeak

None of Laguna's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Laguna's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Laguna?

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

6.3
Sightseeing
6th-best month of the year
8.9
Beach & pool
1st-best month of the year

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

What to pack for Laguna in September

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

In September, Laguna sees daytime highs around 87°F and nights near 59°F. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Laguna in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Laguna peaks around June 21 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 21UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Laguna 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 Laguna is worst in August — around 27 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2126 µg/m³Jun 138 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar15Moderate
Apr12Good
May9Good
Jun8Good
Jul11Good
Aug27Moderate
Sep23Moderate
Oct17Moderate
Nov19Moderate
Dec14Moderate
Location & terrain

Where is Laguna?

Laguna sits at 38.4°N, 121.4°W, 30 ft above sea level, in United States. The nearest listed city is Elk Grove, 3.1 mi away.

Topography around Laguna

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

Within 2 miles, the terrain around Laguna has only modest variations in elevation — a maximum elevation change of 46 ft around an average of 30 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 161 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,337 ft.

The land around Laguna is covered by artificial surfaces (65%) within 2 miles, grassland (33%), cropland (30%) and artificial surfaces (23%) within 10 miles, and grassland (35%), trees (29%) and cropland (23%) within 50 miles.

2 miles
46 ft
10 miles
161 ft
50 miles
4,337 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Elk Grove 3.1 mi · Vineyard 5.0 mi · Florin 5.0 mi · Rosemont 9.3 mi · Sacramento 12 mi · West Sacramento 12 mi · Arden-Arcade 13 mi · Galt 13 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 Laguna (38.421°, -121.4238°, elevation 30 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).