Hilo weather in July

In July, Hilo sees average daytime highs of 76°F and overnight lows near 71°F, with 5.7 in of rain across 25.8 wet days and about 13.1 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 76°F through the month. The sky is clear or mostly clear about 28% of the time in July, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of July to 12 h 54 min by month's end. Set against the rest of the year, July is Hilo's 5th-clearest and 11th-windiest month. For the whole year in context, see Hilo's year-round climate.

Daytime high
76°
4th warmest
Overnight low
71°
9th coldest
Rainfall
5.7 in
25.8 wet days
Daylight
13 h 06 min
5:53 AM – 6:59 PM
Cloud cover
54%
5th clearest
Wind
6 mph
11th windiest
Solar energy
6.59 kWh/m²
Travel score
4.6
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 76°F through the month.

A typical July day in Hilo reaches about 76°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 74°F and 78°F. Set against its neighbours, July runs on par with June and on par with August.

65°70°75°80°85°151015202531
Avg high (°F)Avg low (°F)
17671
27671
37671
47671
57671
67671
77671
87671
97671
107671
117671
127671
137671
147671
157671
167671
177671
187671
197671
207671
217671
227671
237771
247771
257772
267772
277772
287772
297772
307772
317772

Hilo weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 9th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 37% of July, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46535
56634
66634
76733
86733
96733
106634
116634
126634
136634
146634
156634
166634
176634
186634
196634
206535
216535
226535
236436
246436
256535
266535
276436
286436
296436
306436
316535

Chance of precipitation in July

Any precipitation

Hilo gets around 5.7 in of rain over 25.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 83% and peaks near 86% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
179
279
380
480
580
680
781
881
981
1082
1183
1283
1384
1484
1585
1685
1785
1885
1985
2085
2185
2285
2385
2485
2585
2685
2785
2885
2985
3085
3186

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 78% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
114833
213834
313834
413825
512835
612826
711836
811827
910828
1010828
1110819
1298110
1398011
1488012
1587913
1677914
1777815
1877716
1967717
2067618
2167519
2257520
2357520
2457421
2557421
2657322
2757322
2857322
2957322
3057223
3147323

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 5 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
95calm
105calm
115calm
125calm
135calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 12 min at the start of July to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:48 AM to 5:59 AM, and sunset from 6:59 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:486:59
213.25:496:59
313.25:496:59
413.25:496:59
513.25:506:59
613.25:506:59
713.25:506:59
813.15:516:59
913.15:516:59
1013.15:516:59
1113.15:526:59
1213.15:526:59
1313.15:526:59
1413.15:536:59
1513.15:536:59
1613.15:536:59
1713.15:546:58
1813.15:546:58
1913.15:556:58
2013.05:556:58
2113.05:556:57
2213.05:566:57
2313.05:566:57
2413.05:566:57
2513.05:576:56
2613.05:576:56
2713.05:576:56
2813.05:586:55
2912.95:586:55
3012.95:596:54
3112.95:596:54

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.59 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 — July's 6.59 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in July

Hazard calendar for Hilo

In seasonPeak

In July, 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 July a good time to visit Hilo?

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

4.6
Sightseeing
10th-best month of the year
4.1
Beach & pool
6th-best month of the year

July is a reasonable time to visit Hilo for sightseeing.

What to pack for Hilo in July

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

In July, Hilo sees daytime highs around 76°F and nights near 71°F. Pack rain gear and sun protection. Worth having: light clothes. About 26 days see rain.

rain gearsun protectionlight clothes

Sea temperature near Hilo in July

The nearest coast averages about 79°F in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 13 (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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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
July 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).