Pasadena weather in August

In August, Pasadena sees average daytime highs of 82°F and overnight lows near 72°F, with 4.0 in of rain across 10.2 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°F through the month. The sky is clear or mostly clear about 36% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 14 h 06 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Pasadena's 4th-clearest and 11th-windiest month. For the whole year in context, see Pasadena's year-round climate.

Daytime high
82°
2nd warmest
Overnight low
72°
11th coldest
Rainfall
4.0 in
10.2 wet days
Daylight
13 h 30 min
5:24 AM – 6:57 PM
Cloud cover
55%
4th clearest
Wind
7 mph
11th windiest
Solar energy
5.32 kWh/m²
Travel score
6.1
out of 10

Pasadena is census-designated place in the U.S. state of Maryland.

Density
582/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 82°F through the month.

A typical August day in Pasadena reaches about 82°F in the afternoon and slips back to 72°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18473
28473
38473
48373
58373
68373
78373
88373
98373
108373
118373
128373
138373
148372
158372
168372
178272
188272
198272
208272
218272
228272
238271
248271
258271
268171
278171
288171
298171
308170
318170

How August really feels in Pasadena

Once humidity and wind are folded in, August averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Pasadena weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 31°3.592.79.60.1
Feb43° / 32°3.392.810.50.6
Mar51° / 38°4.410.91.611.72.4
Apr61° / 49°3.710.20.1135.1
May70° / 58°3.810.8014.16.4
Jun79° / 68°3.610.8014.76.4
Jul84° / 73°4.211.7014.55.4
Aug82° / 72°4.010.2013.56.1
Sep76° / 66°4.69.2012.37.0
Oct66° / 55°3.98.20116.3
Nov55° / 44°3.38.10.19.93.7
Dec46° / 36°4.19.51.39.31.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25545
35545
45644
55644
65644
75644
85545
95545
105545
115545
125644
135545
145545
155545
165644
175644
185644
195644
205644
215743
225743
235644
245743
255644
265644
275644
285644
295644
305644
315644

Chance of precipitation in August

Any precipitation

Pasadena gets around 4.0 in of rain over 10.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 37% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
336
435
535
635
735
835
936
1036
1136
1236
1336
1436
1536
1636
1735
1835
1934
2033
2133
2232
2331
2430
2530
2629
2729
2828
2928
3028
3129

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1271631403
2281731403
3281731393
4291731393
5291730393
6391730383
7391730383
8391730373
93101730373
103101730364
113101731364
123101831354
133101831354
144101831343
154101931333
164101932333
174101932323
184102032323
194102033312
204102033312
214112133302
224112133302
234112233301
244112232291
254122331291
265122331281
275122430281
286132429281
296132429271
307132528271
317132527261

Wind in August

Winds average 7 mph in August.

Across August, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:10 AM to 5:38 AM, and sunset from 7:14 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:107:14
214.05:117:13
314.05:127:12
414.05:137:11
513.95:147:10
613.95:157:09
713.95:167:08
813.85:177:07
913.85:187:06
1013.85:187:04
1113.75:197:03
1213.75:207:02
1313.75:217:01
1413.65:226:59
1513.65:236:58
1613.55:246:57
1713.55:256:55
1813.55:266:54
1913.45:276:53
2013.45:286:51
2113.35:296:50
2213.35:306:48
2313.35:316:47
2413.25:326:45
2513.25:336:44
2613.15:336:42
2713.15:346:41
2813.15:356:39
2913.05:366:38
3013.05:376:36
3112.95:386:34

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.32 kWh/m².

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 6.1 kWh/m² in June across the year — August's 5.32 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for Pasadena

In seasonPeak

In August, Pasadena sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Pasadena sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Pasadena?

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

6.1
Sightseeing
5th-best month of the year
6.8
Beach & pool
1st-best month of the year

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

What to pack for Pasadena in August

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

In August, Pasadena sees daytime highs around 82°F and nights near 72°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Pasadena in August

The nearest coast averages about 78°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 11 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Pasadena in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Pasadena peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Pasadena in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Pasadena is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Pasadena?

Pasadena sits at 39.1°N, 76.6°W, 82 ft above sea level, in United States. The nearest listed city is Green Haven, 1.9 mi away.

Topography around Pasadena

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

Within 2 miles, the terrain around Pasadena has only modest variations in elevation — a maximum elevation change of 210 ft around an average of 95 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 394 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,316 ft.

The land around Pasadena is covered by trees (75%) within 2 miles, trees (53%) and water (24%) within 10 miles, and trees (53%) within 50 miles.

2 miles
210 ft
10 miles
394 ft
50 miles
1,316 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Green Haven 1.9 mi · South Gate 3.1 mi · Severna Park 3.7 mi · Glen Burnie 4.3 mi · Lake Shore 5.0 mi · Ferndale 5.6 mi · Severn 6.8 mi · Arnold 6.8 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 Pasadena (39.119°, -76.5711°, elevation 82 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).