Fullerton weather in March

In March, Fullerton sees average daytime highs of 66°F and overnight lows near 53°F, with 1.8 in of rain across 5.1 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 66°F through the month. The sky is clear or mostly clear about 45% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Fullerton's 10th-clearest and 5th-windiest month. For the whole year in context, see Fullerton's year-round climate.

Daytime high
66°
9th warmest
Overnight low
53°
4th coldest
Rainfall
1.8 in
5.1 wet days
Daylight
11 h 42 min
6:09 AM – 5:54 PM
Cloud cover
46%
10th clearest
Wind
5 mph
5th windiest
Solar energy
5.34 kWh/m²
Travel score
7.0
out of 10

Fullerton is city in Orange County, California, United States.

Density
2,423/km²
people per km²
Founded
1887

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 66°F through the month.

A typical March day in Fullerton reaches about 66°F in the afternoon and slips back to 53°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 59°F and 75°F. Set against its neighbours, March runs about 2°F warmer than February and about 3°F cooler than April.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16551
26551
36551
46551
56552
66652
76652
86652
96652
106652
116652
126653
136653
146653
156753
166753
176753
186753
196653
206653
216653
226653
236653
246653
256653
266753
276753
286753
296753
306753
316753

Fullerton weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 49°2.85.2106.8
Feb65° / 50°3.16.110.76.7
Mar66° / 53°1.85.111.77.0
Apr69° / 55°0.72.612.87.9
May71° / 58°0.31.513.78.3
Jun74° / 61°0.10.314.29.1
Jul79° / 64°0.10.4149.0
Aug81° / 65°0.00.113.38.9
Sep80° / 64°0.10.512.28.8
Oct76° / 60°0.61.911.18.8
Nov70° / 54°0.72.410.28.1
Dec65° / 49°1.94.99.86.9

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 18% of March, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35743
45743
55842
65941
76040
86139
96238
106337
116436
126436
136535
146634
156634
166634
176634
186634
196535
206535
216535
226535
236535
246436
256436
266535
276535
286535
296535
306634
316634

Chance of precipitation in March

Any precipitation

Fullerton gets around 1.8 in of rain over 5.1 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 23% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
123
223
322
422
521
621
720
820
919
1018
1118
1217
1317
1416
1516
1616
1716
1815
1915
2015
2115
2215
2315
2414
2514
2614
2713
2813
2912
3012
3112

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1946
2937
3937
4928
5928
6919
79010
88911
98812
108713
118614
128515
138416
148317
158317
168317
178317
188317
198416
208416
218515
228614
238614
248713
258812
268911
278911
289010
299010
30919
31919

Wind in March

Winds average 5 mph in March.

Across March, 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.

0246810151015202531
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
315calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 12 min at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over March. Sunrise moves from 6:29 AM to 5:48 AM, and sunset from 5:41 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:295:41
211.26:275:42
311.36:265:43
411.36:255:44
511.36:245:45
611.46:225:45
711.46:215:46
811.56:205:47
911.56:195:48
1011.56:175:49
1111.66:165:50
1211.66:155:50
1311.66:135:51
1411.76:125:52
1511.76:115:53
1611.76:095:54
1711.86:085:54
1811.86:065:55
1911.86:055:56
2011.96:045:57
2111.96:025:57
2212.06:015:58
2312.06:005:59
2412.05:586:00
2512.15:576:00
2612.15:556:01
2712.15:546:02
2812.25:526:03
2912.25:516:04
3012.25:506:04
3112.35:486:05

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5.34 kWh/m².

For context, solar energy here swings from a low near 2.98 kWh/m² to a high of 7.89 kWh/m² in June across the year — March's 5.34 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.6Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.9Bright
85.0Bright
95.0Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
306.0Bright
316.0Bright
Planning a trip in March

Is March a good time to visit Fullerton?

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

7.0
Sightseeing
9th-best month of the year
3.0
Beach & pool
9th-best month of the year

March is one of the better times to visit Fullerton for general sightseeing.

What to pack for Fullerton in March

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

In March, Fullerton sees daytime highs around 66°F and nights near 53°F. Worth packing: sun protection. About 5 days see rain.

sun protection

Sea temperature near Fullerton in March

The nearest coast averages about 59°F in March — 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 69°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar59Cool
Apr60Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug69Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec60Cool

UV index in Fullerton in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fullerton peaks around July 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Fullerton in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Fullerton is worst in September — around 49 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (May, 12 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateSep 1447 µg/m³May 1713 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar19Moderate
Apr17Moderate
May12Moderate
Jun17Moderate
Jul19Moderate
Aug32Moderate
Sep49Poor
Oct21Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Fullerton?

Fullerton sits at 33.9°N, 117.9°W, 164 ft above sea level, in United States. The nearest listed city is Anaheim, 2.5 mi away.

Topography around Fullerton

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

Within 2 miles, the terrain around Fullerton has only modest variations in elevation — a maximum elevation change of 384 ft around an average of 197 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,654 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,010 ft.

The land around Fullerton is covered by artificial surfaces (83%) within 2 miles, artificial surfaces (76%) within 10 miles, and water (29%) and artificial surfaces (25%) within 50 miles.

2 miles
384 ft
10 miles
1,654 ft
50 miles
10,010 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
March weather nearby: Anaheim 2.5 mi · Placentia 3.1 mi · Brea 3.7 mi · Buena Park 4.3 mi · La Habra 4.3 mi · La Mirada 6.2 mi · Stanton 6.2 mi · Yorba Linda 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 Fullerton (33.8703°, -117.9253°, elevation 164 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).