Hilo weather in April: Hilo, Hawaii: normal highs, lows, rain and records for April
Hilo in April has a normal high of 79°F and a normal low of 66°F, a daily mean of 73°F, holding near 79°F all month. Measurable precipitation falls on 25 days in a normal April, 9.40 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 19°C, 239 mm of precipitation in April.
- NOAA stationHilo International Airport 87
- Station IDUSW00021504
- Location19.72°N 155.05°W
- Elevation38 ft (12 m)
- Population (census place)48,223
- Jan 79° 64°
- Feb 78° 64°
- Mar 79° 65°
- Apr 79° 66°
- May 81° 67°
- Jun 82° 69°
- Jul 83° 70°
- Aug 83° 70°
- Sep 83° 70°
- Oct 82° 69°
- Nov 80° 68°
- Dec 79° 66°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hilo in April?
The normal high is 79°F and the normal low 66°F, for a daily mean of 72.5°F. April is 0.6°F warmer than March and 1.5°F cooler than May. April is the 8th warmest month of the year in Hilo and the 7th wettest. Across the month the normal high rises 1°F, from 79°F on April 1 to 80°F on April 30. From one year to the next April's mean temperature typically moves about 1.1°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 71°F and 74°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 81%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 79°F | 66°F | 78% | 56% |
| April 8 | 79°F | 66°F | 80% | 57% |
| April 15 | 79°F | 66°F | 81% | 57% |
| April 22 | 79°F | 66°F | 81% | 55% |
| April 30 | 80°F | 67°F | 79% | 51% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 79°F | 66°F | 78% | 56% | 12 h 20 min |
| April 2 | 79°F | 66°F | 78% | 56% | 12 h 20 min |
| April 3 | 79°F | 66°F | 78% | 56% | 12 h 20 min |
| April 4 | 79°F | 66°F | 79% | 57% | 12 h 20 min |
| April 5 | 79°F | 66°F | 79% | 57% | 12 h 20 min |
| April 6 | 79°F | 66°F | 79% | 57% | 12 h 20 min |
| April 7 | 79°F | 66°F | 80% | 57% | 12 h 30 min |
| April 8 | 79°F | 66°F | 80% | 57% | 12 h 30 min |
| April 9 | 79°F | 66°F | 80% | 57% | 12 h 30 min |
| April 10 | 79°F | 66°F | 80% | 57% | 12 h 30 min |
| April 11 | 79°F | 66°F | 81% | 57% | 12 h 30 min |
| April 12 | 79°F | 66°F | 81% | 57% | 12 h 30 min |
| April 13 | 79°F | 66°F | 81% | 57% | 12 h 30 min |
| April 14 | 79°F | 66°F | 81% | 57% | 12 h 30 min |
| April 15 | 79°F | 66°F | 81% | 57% | 12 h 30 min |
| April 16 | 79°F | 66°F | 81% | 57% | 12 h 40 min |
| April 17 | 79°F | 66°F | 81% | 56% | 12 h 40 min |
| April 18 | 79°F | 66°F | 81% | 56% | 12 h 40 min |
| April 19 | 79°F | 66°F | 81% | 56% | 12 h 40 min |
| April 20 | 79°F | 66°F | 81% | 55% | 12 h 40 min |
| April 21 | 79°F | 66°F | 81% | 55% | 12 h 40 min |
| April 22 | 79°F | 66°F | 81% | 55% | 12 h 40 min |
| April 23 | 79°F | 66°F | 80% | 54% | 12 h 40 min |
| April 24 | 79°F | 66°F | 80% | 54% | 12 h 40 min |
| April 25 | 79°F | 66°F | 80% | 53% | 12 h 50 min |
| April 26 | 80°F | 66°F | 80% | 53% | 12 h 50 min |
| April 27 | 80°F | 66°F | 80% | 52% | 12 h 50 min |
| April 28 | 80°F | 67°F | 79% | 52% | 12 h 50 min |
| April 29 | 80°F | 67°F | 79% | 51% | 12 h 50 min |
| April 30 | 80°F | 67°F | 79% | 51% | 12 h 50 min |
- Normal high
- 79°FApril average
- Normal low
- 66°FApril average
- Precipitation
- 9.40 inmonth total
- Days with precipitation
- 250.01 inch or more
- Daylight
- 12 h 20 min to 12 h 50 minApril 1 to April 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 19
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00021504; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hilo in April?
On a given April day the chance of 0.01 inch or more is 80% on average, highest around April 14 (81%). In all, 9.40 in falls on 25 days of a normal April, 2 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00021504.
How humid and windy is Hilo in April?
At 3 p.m. the normal temperature is 78°F with 66% relative humidity and a dew point of 66°F; at 6 a.m. it is 68°F with 85% humidity. The wind averages 6.7 mph, most often from the east-northeast in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 68°F | 63°F | 85% | 5.6 mph | 16% |
| 9 a.m. | 75°F | 66°F | 72% | 5.8 mph | 18% |
| noon | 78°F | 66°F | 66% | 10.1 mph | 21% |
| 3 p.m. | 78°F | 66°F | 66% | 10.5 mph | 20% |
| 6 p.m. | 75°F | 66°F | 74% | 7.1 mph | 17% |
| 9 p.m. | 72°F | 66°F | 83% | 4.7 mph | 13% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00021504. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for April in Hilo?
The warmest April temperature on Hilo's official record (since 1949) is 89°F, on April 2, 1963; the coldest is 58°F, on April 5, 2008. The wettest April brought 43.24 in (1986).
The April mean against the 1991-2020 normal of 72.5°F: 2021 74.4°F (+1.9), 2022 73.9°F (+1.4), 2023 73.7°F (+1.2), 2025 75.6°F (+3.1), 2026 74.2°F (+1.7). 5 of 5 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.4°F | +1.9°F | 7.80 in |
| 2022 | 73.9°F | +1.4°F | 15.67 in |
| 2023 | 73.7°F | +1.2°F | 9.10 in |
| 2025 | 75.6°F | +3.1°F | 3.34 in |
| 2026 | 74.2°F | +1.7°F | 7.22 in |
Source: records: ACIS, NWS threaded record ITOthr; recent months: ACIS, station USW00021504. Records and recent months use complete months only.
How does April in Hilo compare across Hawaii?
Across the 18 places PlainClimate covers in Hawaii, April normal highs run from 70°F in Kula to 85°F in Kahului; Hilo's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.