Kahului weather in December: Kahului, Hawaii: normal highs, lows, rain and records for December
Kahului in December has a normal high of 83°F and a normal low of 66°F, a daily mean of 75°F, falling from 84°F on the 1st to 83°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 2.80 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 19°C, 71 mm of precipitation in December.
- NOAA stationKahului Airport
- Station IDUSW00022516
- Location20.90°N 156.43°W
- Elevation51 ft (16 m)
- From the center3 miles
- Population (census place)27,068
- Jan 82° 64°
- Feb 82° 64°
- Mar 83° 65°
- Apr 85° 67°
- May 87° 68°
- Jun 88° 70°
- Jul 89° 72°
- Aug 90° 72°
- Sep 90° 71°
- Oct 89° 70°
- Nov 86° 68°
- Dec 83° 66°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Kahului in December?
The normal high is 83°F and the normal low 66°F, for a daily mean of 74.6°F. December is 2.5°F cooler than November and 1.7°F warmer than January. December is the 9th warmest month of the year in Kahului and the wettest. Across the month the normal high falls 1°F, from 84°F on December 1 to 83°F on December 31. From one year to the next December's mean temperature typically moves about 1.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 74°F and 76°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 84°F | 67°F | 32% | 12% |
| December 8 | 84°F | 67°F | 33% | 13% |
| December 15 | 83°F | 66°F | 32% | 13% |
| December 22 | 83°F | 65°F | 31% | 13% |
| December 31 | 83°F | 64°F | 30% | 13% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 84°F | 67°F | 32% | 12% | 11 h |
| December 2 | 84°F | 67°F | 32% | 12% | 11 h |
| December 3 | 84°F | 67°F | 32% | 12% | 11 h |
| December 4 | 84°F | 67°F | 33% | 12% | 11 h |
| December 5 | 84°F | 67°F | 33% | 13% | 11 h |
| December 6 | 84°F | 67°F | 33% | 13% | 11 h |
| December 7 | 84°F | 67°F | 33% | 13% | 10 h 50 min |
| December 8 | 84°F | 67°F | 33% | 13% | 10 h 50 min |
| December 9 | 84°F | 67°F | 33% | 13% | 10 h 50 min |
| December 10 | 84°F | 67°F | 33% | 13% | 10 h 50 min |
| December 11 | 84°F | 67°F | 33% | 13% | 10 h 50 min |
| December 12 | 84°F | 66°F | 32% | 13% | 10 h 50 min |
| December 13 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 14 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 15 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 16 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 17 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 18 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 19 | 83°F | 66°F | 32% | 13% | 10 h 50 min |
| December 20 | 83°F | 66°F | 31% | 13% | 10 h 50 min |
| December 21 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 22 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 23 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 24 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 25 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 26 | 83°F | 65°F | 31% | 13% | 10 h 50 min |
| December 27 | 83°F | 65°F | 30% | 13% | 10 h 50 min |
| December 28 | 83°F | 65°F | 30% | 13% | 10 h 50 min |
| December 29 | 83°F | 65°F | 30% | 13% | 10 h 50 min |
| December 30 | 83°F | 64°F | 30% | 13% | 10 h 50 min |
| December 31 | 83°F | 64°F | 30% | 13% | 10 h 50 min |
- Normal high
- 83°FDecember average
- Normal low
- 66°FDecember average
- Precipitation
- 2.80 inmonth total
- Days with precipitation
- 100.01 inch or more
- Daylight
- 11 h to 10 h 50 minDecember 1 to December 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 26
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00022516; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Kahului in December?
On a given December day the chance of 0.01 inch or more is 32% on average, highest around December 7 (33%). In all, 2.80 in falls on 10 days of a normal December, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00022516.
How humid and windy is Kahului in December?
At 3 p.m. the normal temperature is 79°F with 61% relative humidity and a dew point of 64°F; at 6 a.m. it is 67°F with 83% humidity. The wind averages 10.4 mph, most often from the northeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 67°F | 62°F | 83% | 8.0 mph | 65% |
| 9 a.m. | 73°F | 64°F | 72% | 8.7 mph | 56% |
| noon | 79°F | 64°F | 60% | 14.3 mph | 50% |
| 3 p.m. | 79°F | 64°F | 61% | 14.9 mph | 44% |
| 6 p.m. | 74°F | 64°F | 71% | 11.4 mph | 45% |
| 9 p.m. | 71°F | 64°F | 78% | 9.1 mph | 62% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00022516. 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 December in Kahului?
The warmest December temperature on Kahului's official record (since 1954) is 90°F, on December 7, 1956; the coldest is 52°F, on December 18, 1983. The wettest December brought 10.21 in (1996).
The December mean against the 1991-2020 normal of 74.6°F: 2021 74.5°F (−0.1), 2022 74.5°F (−0.1), 2023 74.5°F (−0.1), 2024 74.9°F (+0.3), 2025 75.5°F (+0.9). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.5°F | −0.1°F | 7.45 in |
| 2022 | 74.5°F | −0.1°F | 3.90 in |
| 2023 | 74.5°F | −0.1°F | 1.00 in |
| 2024 | 74.9°F | +0.3°F | 0.27 in |
| 2025 | 75.5°F | +0.9°F | 0.19 in |
Source: records: ACIS, NWS threaded record OGGthr; recent months: ACIS, station USW00022516. Records and recent months use complete months only.
How does December in Kahului compare across Hawaii?
Across the 18 places PlainClimate covers in Hawaii, December normal highs run from 70°F in Kula to 83°F in Kahului; Kahului's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.