Hilo, HI weather in July
Hilo is warm and humid in July, with rain on most days: highs average 83°F and nights drop to about 70°F. Rain falls on about 27 days. Keep rain gear handy.
- Normal high
- 83°F
- Normal low
- 70°F
- Wet days
- 27
- 9.2 in total
- Muggy days
- 28
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 82°F | 83°F |
| Normal low | 69°F | 70°F |
| Chance of a wet day | 85% | 87% |
| Sunrise / sunset | 5:45 am / 7:03 pm | 5:55 am / 6:57 pm |
| Daylight | 13.3 h | 13.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Hawaii time (no daylight saving)).
A typical July day
- 6 am71°Fdew point 66°F
- 9 am78°Fdew point 69°F
- Noon81°Fdew point 69°F
- 3 pm82°Fdew point 69°F
- 6 pm78°Fdew point 69°F
- 9 pm75°Fdew point 69°F
NOAA hourly normals (local standard time) from Hilo Intl Airport (2 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph9 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more28 of 31
- Wet daysat least 0.01 in of rain or melted snow27 of 31
- Notable rainat least 0.10 in19 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 9.2 in; a dry July brings about 6.3 in and a wet one about 11.4 in (25th and 75th percentiles). About 5 days bring half an inch or more, and about 2 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202015: average high 87°F
- Coolest July1998: average high 81°F
- Wettest July1997: 19.4 in
- Driest July1999: 3.5 in
- Highest reading93°F (July 26, 2020)
- Lowest reading63°F (July 28, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 82°F | 83°F | 83°F |
| Normal low | 69°F | 70°F | 70°F |
| Wet days | 25 | 27 | 27 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 13.3 h | 13.2 h | 12.8 h |
Highs change by +1°F from June and 0°F into August.
Nearby alternatives in July
- Warmer: Kihei, HI114 mi · high 89°F · 8 wet days
- Drier: Kailua-Kona, HI59 mi · high 86°F · 5 wet days
How Hilo ranks in July
- Normal high284th warmest of 378 cities; 7th of 7 in Hawaii
- Wet days378th driest of 378
- Comfortable days289th most of 340
What to pack for Hilo in July
- A rain jacket or umbrella – rain on about 27 days
Heating and cooling
July has 0 heating degree days and 352 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How hot is Hilo in July?
The normal high is 83°F and the normal low is 70°F. From 1991 to 2020 the hottest July reading was 93°F (July 26, 2020).
Does it rain a lot in Hilo in July?
About 27 days in July have at least 0.01 in of precipitation, and the normal total is 9.2 in. The wettest July in 1991-2020 was in 1997 (19.4 in); the driest was in 1999 (3.5 in).
Is July a good time to visit Hilo?
July ranks 7th of 12 months on our comfort score for Hilo (40 out of 100). It has almost no comfortable days. The best months are January and February.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: Hilo Intl Airport (USW00021504), 2.2 mi E of the city center, 38 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Kapoho Beach 93.11 (USC00513368), 23 mi SE of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Hilo International Airport (912850-21504), 2.5 mi E of the city center, 29 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).