Eureka weather in April

In April, Eureka sees average daytime highs of 53°F and overnight lows near 48°F, with 4.1 in of rain across 11.8 wet days and about 13.1 hours of daylight. It is the 8th-warmest and 6th-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 30% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 42 min by month's end. Set against the rest of the year, April is Eureka's 7th-clearest and 5th-windiest month. For the whole year in context, see Eureka's year-round climate.

Daytime high
53°
8th warmest
Overnight low
48°
5th coldest
Rainfall
4.1 in
11.8 wet days
Daylight
13 h 06 min
5:44 AM – 6:49 PM
Cloud cover
60%
7th clearest
Wind
9 mph
5th windiest
Solar energy
5.4 kWh/m²
Travel score
3.0
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.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

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

A typical April day in Eureka reaches about 53°F in the afternoon and slips back to 48°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 58°F. Set against its neighbours, April runs on par with March and about 2°F cooler than May.

40°45°50°55°60°151015202530
Avg high (°F)Avg low (°F)
15347
25347
35347
45347
55347
65347
75347
85347
95347
105347
115347
125347
135347
145347
155348
165348
175348
185448
195448
205448
215448
225448
235448
245448
255448
265448
275449
285449
295449
305549

Eureka weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan53° / 46°8.015.39.42.6
Feb53° / 46°6.713.410.42.6
Mar53° / 47°7.014.711.72.6
Apr53° / 48°4.111.813.13.0
May55° / 50°2.1714.23.9
Jun57° / 52°0.93.714.94.9
Jul60° / 53°0.10.814.66.0
Aug61° / 54°0.20.913.66.3
Sep61° / 54°0.62.312.36.3
Oct59° / 52°2.96.310.95.1
Nov55° / 49°5.712.59.73.3
Dec53° / 47°9.615.69.12.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
24060
34060
44060
54060
64159
74258
84258
94159
104258
114258
124357
134357
144456
154555
164555
174555
184654
194753
204753
214753
224753
234951
244951
254951
265050
275149
285248
295347
305347

Chance of precipitation in April

Any precipitation

Eureka gets around 4.1 in of rain over 11.8 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 40% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
144
244
344
444
545
645
745
846
946
1046
1146
1246
1346
1445
1544
1643
1742
1841
1940
2038
2137
2235
2334
2433
2532
2630
2729
2828
2927
3026

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 100% 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
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
28991
29991
30991

Wind in April

Winds average 9 mph in April.

Across April, 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.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over April. Sunrise moves from 6:09 AM to 5:24 AM, and sunset from 6:33 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:096:33
212.56:076:35
312.56:066:36
412.56:046:37
512.66:026:38
612.66:016:39
712.75:596:40
812.75:576:41
912.85:566:42
1012.85:546:43
1112.95:526:44
1212.95:516:45
1313.05:496:46
1413.05:476:47
1513.05:466:48
1613.15:446:49
1713.15:436:51
1813.25:416:52
1913.25:406:53
2013.35:386:54
2113.35:376:55
2213.35:356:56
2313.45:346:57
2413.45:326:58
2513.55:316:59
2613.55:297:00
2713.65:287:01
2813.65:267:02
2913.65:257:03
3013.75:247:04

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.4 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 — April's 5.4 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.6Bright
215.6Bright
225.7Bright
235.8Bright
245.8Bright
255.9Bright
266.0Bright
276.0Intense
286.1Intense
296.1Intense
306.2Intense
Planning a trip in April

Hazard calendar for Eureka

In seasonPeak

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

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 April a good time to visit Eureka?

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

3.0
Sightseeing
8th-best month of the year
Beach & pool
never really warm enough

April is a weaker month for outdoor sightseeing in Eureka.

What to pack for Eureka in April

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

In April, Eureka sees daytime highs around 53°F and nights near 48°F. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Eureka in April

The nearest coast averages about 52°F in April — 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.

50°52°54°56°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan52Bracing
Feb52Bracing
Mar51Bracing
Apr52Bracing
May52Bracing
Jun53Bracing
Jul54Bracing
Aug55Bracing
Sep55Bracing
Oct54Bracing
Nov53Bracing
Dec53Bracing

UV index in Eureka in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 21UV 9Dec 15UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May9Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep5High
Oct5Moderate
Nov2Low
Dec2Low

Air quality in Eureka 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 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).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1234 µg/m³Dec 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar8Good
Apr9Good
May8Good
Jun9Good
Jul11Good
Aug28Moderate
Sep35Poor
Oct8Good
Nov7Good
Dec6Good
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
10 miles
2,293 ft
50 miles
7,415 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
April 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
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 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).