Hilo weather in October

In October, Hilo sees average daytime highs of 77°F and overnight lows near 71°F, with 5.4 in of rain across 23 wet days and about 11.5 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 77°F through the month. The sky is clear or mostly clear about 24% of the time in October, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of October to 11 h 18 min by month's end. Set against the rest of the year, October is Hilo's 9th-clearest and 8th-windiest month. For the whole year in context, see Hilo's year-round climate.

Daytime high
77°
3rd warmest
Overnight low
71°
10th coldest
Rainfall
5.4 in
23 wet days
Daylight
11 h 30 min
6:19 AM – 5:52 PM
Cloud cover
59%
9th clearest
Wind
6 mph
8th windiest
Solar energy
5.24 kWh/m²
Travel score
5.0
out of 10

Hilo is human settlement and census-designated place in Hawaii, United States.

Density
287/km²
people per km²

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 77°F through the month.

A typical October day in Hilo reaches about 77°F in the afternoon and slips back to 71°F overnight — a 5°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 79°F. Set against its neighbours, October runs on par with September and about 2°F warmer than November.

65°70°75°80°85°151015202531
Avg high (°F)Avg low (°F)
17772
27772
37772
47772
57772
67772
77772
87772
97772
107772
117772
127772
137772
147772
157771
167771
177771
187771
197671
207671
217671
227671
237671
247671
257671
267671
277671
287671
297671
307671
317671

Hilo weather by month

How October compares with the rest of the year at a glance. October is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan73° / 67°5.816.810.96.0
Feb72° / 67°6.617.211.35.5
Mar72° / 67°9.123.511.94.7
Apr73° / 68°7.124.812.44.5
May74° / 69°5.723.712.94.9
Jun75° / 70°4.724.113.24.8
Jul76° / 71°5.725.813.14.6
Aug77° / 72°6.725.612.74.6
Sep77° / 72°4.52212.15.1
Oct77° / 71°5.42311.55.0
Nov75° / 70°7.523.211.14.8
Dec73° / 68°7.922.210.85.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 32% of October, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26139
36139
46139
56040
65941
75941
85941
95941
105743
115743
125644
135545
145545
155446
165446
175347
185248
195248
205149
215149
225149
235149
245248
255248
265248
275248
285347
295347
305248
315347

Chance of precipitation in October

Any precipitation

Hilo gets around 5.4 in of rain over 23 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 74% and peaks near 80% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
169
269
369
469
570
670
770
871
971
1072
1172
1272
1373
1473
1574
1674
1774
1875
1975
2076
2176
2277
2377
2478
2578
2678
2779
2879
2979
3079
3180

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the muggy band about 76% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
157520
257520
357520
457619
557619
667519
767618
867618
967618
1077518
1177617
1277617
1387517
1487517
1587517
1687517
1797516
1897516
1997516
2097516
2197615
2297615
2397615
2497615
2597615
26107515
27107614
28107614
29107614
30107713
31107713

Wind in October

Winds average 6 mph in October.

Across October, 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.

0246810151015202531
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
316calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 48 min at the start of October to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over October. Sunrise moves from 6:15 AM to 6:25 AM, and sunset from 6:04 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:156:04
211.86:156:03
311.86:156:02
411.86:156:01
511.76:166:00
611.76:166:00
711.76:165:59
811.76:175:58
911.76:175:57
1011.76:175:56
1111.66:175:55
1211.66:185:55
1311.66:185:54
1411.66:185:53
1511.66:195:52
1611.56:195:52
1711.56:205:51
1811.56:205:50
1911.56:205:49
2011.56:215:49
2111.56:215:48
2211.46:215:47
2311.46:225:47
2411.46:225:46
2511.46:235:46
2611.46:235:45
2711.36:245:44
2811.36:245:44
2911.36:245:43
3011.36:255:43
3111.36:255:42

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.24 kWh/m².

For context, solar energy here swings from a low near 4.17 kWh/m² to a high of 6.68 kWh/m² in June across the year — October's 5.24 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in October

Hazard calendar for Hilo

In seasonPeak

In October, Hilo sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

Hilo sits in the eastern Pacific hurricane zone; the season peaks August–September.

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

Is October a good time to visit Hilo?

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

5.0
Sightseeing
5th-best month of the year
4.4
Beach & pool
3rd-best month of the year

October is a reasonable time to visit Hilo for sightseeing.

What to pack for Hilo in October

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

In October, Hilo sees daytime highs around 77°F and nights near 71°F. Pack rain gear. Worth having: light clothes and sun protection. About 23 days see rain.

rain gearlight clothessun protection

Sea temperature near Hilo in October

The nearest coast averages about 80°F in October — 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 September at about 80°F and coldest in March near 75°F.

The water stays above 68°F all year — warm enough for a swim any month.

74°76°78°80°82°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan76Warm
Feb75Warm
Mar75Warm
Apr76Warm
May77Warm
Jun78Warm
Jul79Warm
Aug79Warm
Sep80Warm
Oct80Warm
Nov78Warm
Dec77Warm

UV index in Hilo in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hilo peaks around August 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 15UV 14Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr14Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Hilo in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Hilo is worst in January — around 28 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 2128 µg/m³Jul 1917 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb27Moderate
Mar26Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul16Moderate
Aug18Moderate
Sep21Moderate
Oct25Moderate
Nov22Moderate
Dec24Moderate
Location & terrain

Where is Hilo?

Hilo sits at 19.7°N, 155.1°W, 59 ft above sea level, in United States. The nearest listed city is Kīhei, 113 mi away.

Topography around Hilo

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

Within 2 miles, the terrain around Hilo has only modest variations in elevation — a maximum elevation change of 774 ft around an average of 197 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,606 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 13,750 ft.

The land around Hilo is covered by trees (34%), water (29%) and grassland (22%) within 2 miles, trees (42%) and water (29%) within 10 miles, and water (49%) and grassland (20%) within 50 miles.

2 miles
774 ft
10 miles
3,606 ft
50 miles
13,750 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
October weather nearby: Kīhei 113 mi · Kahului 120 mi · Wailuku 122 mi · Lahaina 130 mi · Hawai‘i Kai 201 mi · East Honolulu 201 mi · Niu Valley 202 mi · Kuliouou - Kalani Iki 203 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 Hilo (19.7299°, -155.0907°, elevation 59 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).