Atascadero weather in April

In April, Atascadero sees average daytime highs of 67°F and overnight lows near 48°F, with 0.9 in of rain across 3.5 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 64°F in the first days to 69°F by the end. The sky is clear or mostly clear about 58% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Atascadero's 7th-clearest and 1st-windiest month. For the whole year in context, see Atascadero's year-round climate.

Daytime high
67°
7th warmest
Overnight low
48°
6th coldest
Rainfall
0.9 in
3.5 wet days
Daylight
12 h 54 min
5:36 AM – 6:30 PM
Cloud cover
36%
7th clearest
Wind
6 mph
1st windiest
Solar energy
6.75 kWh/m²
Travel score
7.5
out of 10

Atascadero is city in San Luis Obispo County, California, United States.

Density
441/km²
people per km²
Founded
1979

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 64°F in the first days to 69°F by the end.

A typical April day in Atascadero reaches about 67°F in the afternoon and slips back to 48°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 57°F and 76°F. Set against its neighbours, April runs about 4°F warmer than March and about 5°F cooler than May.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
16446
26446
36446
46446
56546
66546
76546
86547
96547
106547
116547
126547
136647
146647
156647
166647
176747
186748
196748
206748
216848
226848
236849
246849
256949
266949
276949
286949
297050
307050

Atascadero weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 43°3.37.19.95.0
Feb60° / 44°3.37.710.75.2
Mar63° / 46°2.56.411.76.3
Apr67° / 48°0.93.512.97.5
May71° / 51°0.41.713.88.5
Jun76° / 55°0.10.414.49.4
Jul79° / 59°0.00.114.29.2
Aug80° / 59°0.00.213.39.1
Sep78° / 57°0.10.412.29.2
Oct73° / 53°0.7211.18.8
Nov65° / 47°1.13.610.17.1
Dec59° / 42°2.56.29.65.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27228
37228
47228
57228
67228
77228
87129
97228
107228
117228
127228
137129
147228
157228
167228
177327
187327
197327
207525
217525
227525
237525
247624
257624
267723
277723
287723
297723
307723

Chance of precipitation in April

Any precipitation

Atascadero gets around 0.9 in of rain over 3.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 12% and peaks near 17% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
117
216
316
415
515
615
715
815
915
1014
1114
1214
1313
1413
1512
1612
1711
1811
1911
2010
2110
229
239
249
258
268
278
288
298
307

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30982

Wind in April

Winds average 6 mph in April, the windiest month of the year.

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

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 5:57 AM to 5:19 AM, and sunset from 6:17 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:576:17
212.45:566:18
312.45:546:19
412.45:536:20
512.55:516:21
612.55:506:22
712.65:496:22
812.65:476:23
912.65:466:24
1012.75:446:25
1112.75:436:26
1212.75:426:26
1312.85:406:27
1412.85:396:28
1512.95:376:29
1612.95:366:30
1712.95:356:31
1813.05:336:31
1913.05:326:32
2013.05:316:33
2113.15:296:34
2213.15:286:35
2313.15:276:36
2413.25:266:36
2513.25:246:37
2613.25:236:38
2713.35:226:39
2813.35:216:40
2913.45:206:41
3013.45:196:42

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.75 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 8.26 kWh/m² in June across the year — April's 6.75 kWh/m² falls in the middle.

02468151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.4Intense
86.4Intense
96.5Intense
106.5Intense
116.6Intense
126.6Intense
136.7Intense
146.7Intense
156.7Intense
166.8Intense
176.8Intense
186.9Intense
196.9Intense
206.9Intense
217.0Intense
227.0Intense
237.1Intense
247.1Intense
257.1Intense
267.2Intense
277.2Intense
287.3Intense
297.3Intense
307.3Intense
Planning a trip in April

Is April a good time to visit Atascadero?

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

7.5
Sightseeing
7th-best month of the year
3.4
Beach & pool
7th-best month of the year

April is one of the better times to visit Atascadero for general sightseeing.

What to pack for Atascadero in April

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

In April, Atascadero sees daytime highs around 67°F and nights near 48°F. Pack sun protection. About 4 days see rain.

sun protection

Sea temperature near Atascadero in April

The nearest coast averages about 54°F in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 mi away) is warmest in September at about 60°F and coldest in April near 54°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°62°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan56Bracing
Feb56Bracing
Mar55Bracing
Apr54Bracing
May54Bracing
Jun56Bracing
Jul58Bracing
Aug59Cool
Sep60Cool
Oct60Cool
Nov58Bracing
Dec57Bracing

UV index in Atascadero in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Atascadero peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 11Dec 14UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep7Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Atascadero in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Atascadero is worst in August — around 19 µg/m³ PM2.5 (moderate), about 4.5× the cleanest month (June, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 2218 µg/m³Jun 124 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb6Good
Mar7Good
Apr6Good
May5Good
Jun4Good
Jul7Good
Aug19Moderate
Sep17Moderate
Oct7Good
Nov6Good
Dec5Good
Location & terrain

Where is Atascadero?

Atascadero sits at 35.5°N, 120.7°W, 879 ft above sea level, in United States. The nearest listed city is Paso Robles, 9.3 mi away.

Topography around Atascadero

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

Within 2 miles, the terrain around Atascadero has only modest variations in elevation — a maximum elevation change of 600 ft around an average of 948 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,549 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,698 ft.

The land around Atascadero is covered by trees (39%), grassland (35%) and artificial surfaces (23%) within 2 miles, grassland (56%) and trees (33%) within 10 miles, and grassland (54%) and water (22%) within 50 miles.

2 miles
600 ft
10 miles
2,549 ft
50 miles
4,698 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Paso Robles 9.3 mi · San Luis Obispo 14 mi · Arroyo Grande 26 mi · Nipomo 33 mi · Santa Maria 39 mi · Orcutt 45 mi · Coalinga 48 mi · Lompoc 60 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 Atascadero (35.4894°, -120.6707°, elevation 879 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).