Eureka weather in March

In March, Eureka sees average daytime highs of 53°F and overnight lows near 47°F, with 7.0 in of rain across 14.7 wet days and about 11.7 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 53°F through the month. The sky is clear or mostly clear about 25% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Eureka's 9th-clearest and 2nd-windiest month. For the whole year in context, see Eureka's year-round climate.

Daytime high: 53°; 11th warmest
Overnight low: 47°; 3rd coldest
Rainfall: 7.0 in; 14.7 wet days
Daylight: 11 h 42 min; 6:36 AM – 6:16 PM
Cloud cover: 64%; 9th clearest
Wind: 10 mph; 2nd windiest
Solar energy: 3.97 kWh/m²
Travel score: 2.6; out of 10

Eureka is city in and county seat of Humboldt County, California, United States.

Density: 722/km²; people per km²
Founded: 1850

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

← February Eureka year-round climate April →Best places to visit in March

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 53°F through the month.

A typical March day in Eureka reaches about 53°F in the afternoon and slips back to 47°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 48°F and 57°F. Set against its neighbours, March runs on par with February and on par with April.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53
Avg low (°F)	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47

	Avg high (°F)	Avg low (°F)
1	52	46
2	52	46
3	52	46
4	52	46
5	52	46
6	52	46
7	52	46
8	52	46
9	53	46
10	53	47
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47
31	53	47

Eureka weather by month

How March compares with the rest of the year at a glance. March is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	53° / 46°	8.0	15.3	9.4	2.6
Feb	53° / 46°	6.7	13.4	10.4	2.6
Mar	53° / 47°	7.0	14.7	11.7	2.6
Apr	53° / 48°	4.1	11.8	13.1	3.0
May	55° / 50°	2.1	7	14.2	3.9
Jun	57° / 52°	0.9	3.7	14.9	4.9
Jul	60° / 53°	0.1	0.8	14.6	6.0
Aug	61° / 54°	0.2	0.9	13.6	6.3
Sep	61° / 54°	0.6	2.3	12.3	6.3
Oct	59° / 52°	2.9	6.3	10.9	5.1
Nov	55° / 49°	5.7	12.5	9.7	3.3
Dec	53° / 47°	9.6	15.6	9.1	2.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 61%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	40	40	40	40	40	41	41	41	40	40	40	40	40	40	39	39	39	38	38	38	39	39	39	38	38	38	39	39	39	39	39
Cloudier (%)	60	60	60	60	60	59	59	59	60	60	60	60	60	60	61	61	61	62	62	62	61	61	61	62	62	62	61	61	61	61	61

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	41	59
7	41	59
8	41	59
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	39	61
16	39	61
17	39	61
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	39	61
24	38	62
25	38	62
26	38	62
27	39	61
28	39	61
29	39	61
30	39	61
31	39	61

Chance of precipitation in March

Any precipitation

Eureka gets around 7.0 in of rain over 14.7 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 46% and peaks near 50% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	50	50	49	49	48	48	47	47	46	46	45	45	45	45	45	46	46	46	47	47	47	47	47	46	46	46	45	45	45	44	44

	Rain chance (%)
1	50
2	50
3	49
4	49
5	48
6	48
7	47
8	47
9	46
10	46
11	45
12	45
13	45
14	45
15	45
16	46
17	46
18	46
19	47
20	47
21	47
22	47
23	47
24	46
25	46
26	46
27	45
28	45
29	45
30	44
31	44

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in March

Winds average 10 mph in March.

Across March, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	10	10	10	10	10	10	10	10	9	9	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	10	light breeze
2	10	light breeze
3	10	light breeze
4	10	light breeze
5	10	light breeze
6	10	light breeze
7	10	light breeze
8	10	light breeze
9	9	light breeze
10	9	light breeze
11	9	light breeze
12	9	light breeze
13	9	light breeze
14	10	light breeze
15	10	light breeze
16	10	light breeze
17	10	light breeze
18	10	light breeze
19	10	light breeze
20	10	light breeze
21	10	light breeze
22	10	light breeze
23	10	light breeze
24	10	light breeze
25	10	light breeze
26	10	light breeze
27	10	light breeze
28	10	light breeze
29	10	light breeze
30	10	light breeze
31	10	light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 hours at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over March. Sunrise moves from 7:00 AM to 6:11 AM, and sunset from 5:59 PM to 6:32 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	11.0	11.0	11.1	11.1	11.2	11.2	11.3	11.3	11.3	11.4	11.4	11.5	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.3	12.3	12.4
Sunrise (AM)	7:00	6:59	6:57	6:56	6:54	6:53	6:51	6:50	6:48	6:46	6:45	6:43	6:41	6:40	6:38	6:36	6:35	6:33	6:31	6:30	6:28	6:26	6:25	6:23	6:21	6:19	6:18	6:16	6:14	6:13	6:11
Sunset (PM)	5:59	6:00	6:02	6:03	6:04	6:05	6:06	6:07	6:08	6:10	6:11	6:12	6:13	6:14	6:15	6:16	6:17	6:18	6:20	6:21	6:22	6:23	6:24	6:25	6:26	6:27	6:28	6:29	6:30	6:31	6:32

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.0	7:00	5:59
2	11.0	6:59	6:00
3	11.1	6:57	6:02
4	11.1	6:56	6:03
5	11.2	6:54	6:04
6	11.2	6:53	6:05
7	11.3	6:51	6:06
8	11.3	6:50	6:07
9	11.3	6:48	6:08
10	11.4	6:46	6:10
11	11.4	6:45	6:11
12	11.5	6:43	6:12
13	11.5	6:41	6:13
14	11.6	6:40	6:14
15	11.6	6:38	6:15
16	11.7	6:36	6:16
17	11.7	6:35	6:17
18	11.8	6:33	6:18
19	11.8	6:31	6:20
20	11.8	6:30	6:21
21	11.9	6:28	6:22
22	11.9	6:26	6:23
23	12.0	6:25	6:24
24	12.0	6:23	6:25
25	12.1	6:21	6:26
26	12.1	6:19	6:27
27	12.2	6:18	6:28
28	12.2	6:16	6:29
29	12.3	6:14	6:30
30	12.3	6:13	6:31
31	12.4	6:11	6:32

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 3.97 kWh/m².

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 7.66 kWh/m² in July across the year — March's 3.97 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.3	3.3	3.4	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.8	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.5	4.5	4.5	4.6	4.7	4.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.3	Moderate
2	3.3	Moderate
3	3.4	Moderate
4	3.4	Moderate
5	3.5	Moderate
6	3.5	Moderate
7	3.5	Moderate
8	3.6	Moderate
9	3.6	Moderate
10	3.7	Moderate
11	3.8	Moderate
12	3.8	Moderate
13	3.8	Moderate
14	3.9	Moderate
15	3.9	Moderate
16	4.0	Moderate
17	4.0	Bright
18	4.1	Bright
19	4.1	Bright
20	4.2	Bright
21	4.2	Bright
22	4.3	Bright
23	4.3	Bright
24	4.3	Bright
25	4.4	Bright
26	4.5	Bright
27	4.5	Bright
28	4.5	Bright
29	4.6	Bright
30	4.7	Bright
31	4.7	Bright

Planning a trip in March

Hazard calendar for Eureka

In seasonPeak

In March, Eureka sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Eureka'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 March a good time to visit Eureka?

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

2.6

Sightseeing

9th-best month of the year

—

Beach & pool

never really warm enough

March is a weaker month for outdoor sightseeing in Eureka.

What to pack for Eureka in March

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

In March, Eureka sees daytime highs around 53°F and nights near 47°F. Pack a warm layer and rain gear. About 15 days see rain.

a warm layerrain gear

Sea temperature near Eureka in March

The nearest coast averages about 51°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 55°F and coldest in March near 51°F.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	52	52	51	52	52	53	54	55	55	54	53	53
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	52	Bracing
Feb	52	Bracing
Mar	51	Bracing
Apr	52	Bracing
May	52	Bracing
Jun	53	Bracing
Jul	54	Bracing
Aug	55	Bracing
Sep	55	Bracing
Oct	54	Bracing
Nov	53	Bracing
Dec	53	Bracing

UV index in Eureka 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 Eureka peaks around June 21 at about 9 (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 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	5	6	9	10	9	8	5	5	2	2
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	5	Moderate
Apr	6	High
May	9	Very high
Jun	10	Very high
Jul	9	Very high
Aug	8	Very high
Sep	5	High
Oct	5	Moderate
Nov	2	Low
Dec	2	Low

Air quality in Eureka 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 Eureka is worst in September — around 35 µg/m³ PM2.5 (poor), about 6.3× the cleanest month (December, 6 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	6	7	8	9	8	9	11	28	35	8	7	6
Level	Good	Good	Good	Good	Good	Good	Good	Moderate	Poor	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	6	Good
Feb	7	Good
Mar	8	Good
Apr	9	Good
May	8	Good
Jun	9	Good
Jul	11	Good
Aug	28	Moderate
Sep	35	Poor
Oct	8	Good
Nov	7	Good
Dec	6	Good

Location & terrain

Where is Eureka?

Eureka sits at 40.8°N, 124.2°W, 39 ft above sea level, in United States. The nearest listed city is Bayside, 6.2 mi away.

Topography around Eureka

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

Within 2 miles, the terrain around Eureka has only modest variations in elevation — a maximum elevation change of 302 ft around an average of 39 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,293 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,415 ft.

The land around Eureka is covered by water (35%) and artificial surfaces (32%) within 2 miles, water (46%) and trees (39%) within 10 miles, and trees (64%) and water (30%) within 50 miles.

2 miles

302 ft

water 35%

10 miles

2,293 ft

water 46%

50 miles

7,415 ft

trees 64%

treesgrasslandartificial surfacesbare terrainwaterwetland

← February Eureka year-round climate April →Best places to visit in March

March weather nearby: Bayside 6.2 mi · Arcata 6.2 mi · McKinleyville 11 mi · Redding 94 mi · Grants Pass 121 mi · Ashland 122 mi · Medford 125 mi · Ukiah 125 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

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 Eureka (40.8021°, -124.1637°, elevation 39 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).

	Avg high (°F)	Avg low (°F)
1	52	46
2	52	46
3	52	46
4	52	46
5	52	46
6	52	46
7	52	46
8	52	46
9	53	46
10	53	47
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47
31	53	47

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	41	59
7	41	59
8	41	59
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	39	61
16	39	61
17	39	61
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	39	61
24	38	62
25	38	62
26	38	62
27	39	61
28	39	61
29	39	61
30	39	61
31	39	61

	Rain chance (%)
1	50
2	50
3	49
4	49
5	48
6	48
7	47
8	47
9	46
10	46
11	45
12	45
13	45
14	45
15	45
16	46
17	46
18	46
19	47
20	47
21	47
22	47
23	47
24	46
25	46
26	46
27	45
28	45
29	45
30	44
31	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	52	46
2	52	46
3	52	46
4	52	46
5	52	46
6	52	46
7	52	46
8	52	46
9	53	46
10	53	47
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47
31	53	47

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	41	59
7	41	59
8	41	59
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	39	61
16	39	61
17	39	61
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	39	61
24	38	62
25	38	62
26	38	62
27	39	61
28	39	61
29	39	61
30	39	61
31	39	61

	Rain chance (%)
1	50
2	50
3	49
4	49
5	48
6	48
7	47
8	47
9	46
10	46
11	45
12	45
13	45
14	45
15	45
16	46
17	46
18	46
19	47
20	47
21	47
22	47
23	47
24	46
25	46
26	46
27	45
28	45
29	45
30	44
31	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	52	46
2	52	46
3	52	46
4	52	46
5	52	46
6	52	46
7	52	46
8	52	46
9	53	46
10	53	47
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47
31	53	47

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	41	59
7	41	59
8	41	59
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	39	61
16	39	61
17	39	61
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	39	61
24	38	62
25	38	62
26	38	62
27	39	61
28	39	61
29	39	61
30	39	61
31	39	61

	Rain chance (%)
1	50
2	50
3	49
4	49
5	48
6	48
7	47
8	47
9	46
10	46
11	45
12	45
13	45
14	45
15	45
16	46
17	46
18	46
19	47
20	47
21	47
22	47
23	47
24	46
25	46
26	46
27	45
28	45
29	45
30	44
31	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100